GA-EP45-UD3P + 4GB/8GB Corsair Dominator DDR2 1066 Intermittent Problems

[Plexor]

Hello everyone, I have had my UD3P for a couple months. I was running 'optimized defaults' for the first month without any problems, 100% stable. One day, many apps began segfaulting... i ran memtest86+ and many errors were springing up. I have tried since then many bios settings and have had it work for limited periods of time. Sometimes I find my system to be stable for multiple days!

I really am not sure whether or not the memory modules are bad or the motherboard is bad... or if there is some 'magical' bios setting im not aware of...

I was thinking perhaps the motherboard 'burned in' and now requires new, special settings...or perhaps the components are just 'barely' faulty... in which sometimes they work and sometimes they dont?

GA-EP45-UD3P rev 1.1
BIOS Rev: F9L
CPU: E8500 (Core2Duo 3.16GHz)
RAM: 8gb (2gbx4) Corsair Dominator 1066 DDR2 (2 packs TWIN2X4096-8500C5D G)

http://corsair.com/products/go.aspx?pn=TWIN2X4096-8500C5D

GFX Card: MSI N260GTX-T2D896-OCv3
2x 1TB WD Black
PSU: Antec TP-750 (TruePower New 750 Watt)
Sunbeamtech CCF92 CPU cooler
OS: Archlinux 64bit and Ubuntu Jaunty 9.04

Originally I was running all 4 sticks with optimized defaults which was working fine... for the last few days I have been running 2 sticks (4gb total) with the below settings which has appeared to be stable and passed memtest86+ with 0 errors for 9 hrs per run, 3 runs... and now it is giving errors!

At some point, my computer freezes. (seems to happen while I sleep) When I reboot and run memtest86+, i get many errors. All 'error-bits' are XX000000... sometimes it is always ff000000, right now as I speak I am seeing random 'error-bits' all on the first 2 hex digits.

Also, I want to note that sometimes memtest86+ reports a FSB frequency that is different than what is set in the bios! It does not occur consistently, but when it does happen, it is usually a couple MHz higher than it should be... for example, 335 when I have the FSB set to 333!

Could you guys please help me work out this problem? It is giving me a headache as this intermittent problem seems to be so irratic. Thanks in advance for any help.

BIOS SETTINGS

> MB Intelligent Tweaker(M.I.T.)
Robust Graphics Booster ...............: Auto
CPU Clock Ratio ..........................: 9x
Fine CPU Clock Ratio.....................:.+0.5
CPU Frequency ...........................: 3.16GHz( 333x9.5)


>> Clock Chip Control
>>>>> Standard Clock Control
CPU Host Clock Control.................: [Enabled]
CPU Host Frequency (Mhz) ..............: 333 Mhz
PCI Express Frequency (Mhz) ...........: 100

C.I.A.2 ...............................:[Disabled]

>>>>> Advanced Clock Control
> Advanced Clock Control [Press Enter]
CPU Clock Drive........................: 800mV
PCI Express Clock Drive................: 900mV
CPU Clock Skew (ps)....................: 0ps
MCH Clock Skew (ps)....................: 0ps


>> DRAM Performance Control
Performance Enhance....................: [STANDARD]
Extreme Memory Profile (X.M.P.)........: Disabled
(G)MCH Frequency Latch.................: [Auto]
System Memory Multiplier ..............: [3.20B]
Memory Frequency (Mhz) ................: 1066
DRAM Timing Selectable ................: [Manual]

>>>>> Standard Timing Control
CAS Latency Time.......................: 5 [ 5]
tRCD ..................................: 7 [ 5]
tRP'...................................: 7 [ 5]
tRAS...................................: 24 [ 15]

Set all Suggested below to highest Values first. Then later you can lower, one at a time, testing as you go

>>>>> Advanced Timing Control
> Advanced Timing Control [Press Enter]
tRRD...................................: 4 [ 4]
tWTR...................................: 4 [ 4]
tWR....................................: 8 [ 8]
tRFC...................................: 68 [ 68]
tRTP...................................: 4 [ 4]
Command Rate (CMD) ....................: 0 [ 2]

Channel A
Driving Strength ......................: [1066MHz]

Static tRead Value.....................: 8 [ 8]
tRD Phase0 Adjustment..................: 0 [Auto] <<< Leave for all below as well
tRD Phase1 Adjustment..................: 0 [Auto]
tRD Phase2 Adjustment ................: 0 [Auto]
tRD Phase3 Adjustment.................: 0 [Auto]
Trd2rd(Different Rank).................: 8 [Auto]
Twr2wr(Different Rank).................: 8 [Auto]
Twr2rd(Different Rank).................: 7 [Auto]
Trd2wr(Same/Diff Rank).................: 9 [Auto]
Dimm1 Clock Skew Control...............: [Auto]
Dimm2 Clock Skew Control...............: [Auto]

Channel B
Driving Strength ......................: [1066MHz]

Static tRead Value.....................: 8 [ 8]
tRD Phase0 Adjustment..................: 0 [Auto] <<< Leave for all below as well
tRD Phase1 Adjustment..................: 0 [Auto]
tRD Phase2 Adjustment ................: 0 [Auto]
tRD Phase3 Adjustment.................: 0 [Auto]
Trd2rd(Different Rank).................: 8 [Auto]
Twr2wr(Different Rank).................: 8 [Auto]
Twr2rd(Different Rank).................: 7 [Auto]
Trd2wr(Same/Diff Rank).................: 9 [Auto]
Dimm1 Clock Skew Control...............: [Auto]
Dimm2 Clock Skew Control...............: [Auto]

> Motherboard Voltage Control
>>> CPU
Load-Line Calibration..................: [Disabled]
CPU Vcore..............................: 1.18750V [1.18750V]
CPU Termination........................: 1.200V [1.200V] << If overclocking Please set to stock, Auto overvolts this way to much. Optimal range for overclock would be 1.2-1.5 depending on Vcore, try to keep at least .1 under vcore. Auto is fine if not overclocking
CPU PLL................................: 1.500V [1.500V] << If overclocking Please set to stock, Auto overvolts this way to much. Optimal range for overclock would be 1.5-1.65. Auto is fine if not overclocking

CPU Reference..........................: 0.760V [Auto] << .64% Of Vtt (Termination above) Auto Will set this correctly
>>> MCH/ICH
MCH Core...............................: 1.100V [1.240V]
MCH Reference..........................: 0.760V [Auto]
MCH/DRAM Ref...........................: 0.900V [Auto]
ICH I/O................................: 1.500V [1.500V]
ICH Core...............................: 1.100V [1.100V]

>>> DRAM
DRAM Voltage...........................: 1.800V [2.100V]
DRAM Termination.......................: 0.760V [Auto] << Leave
Channel A Reference 0.900V.............: 0.900V [Auto] << Leave
Channel B Reference 0.900V.............: 0.900V [Auto] << Leave

> Advanced Settings
Limit CPUID Max. to 3..................: [Disabled]
No-Execute Memory Protect..............: [Enabled]
CPU Enhanced Halt (C1E)................: [Disabled]
C2/C2E State Support...................: [Disabled]
x C4/C4E State Support.................: [Disabled]
CPU Thermal Monitor 2(TM2) ............: [Enabled]
CPU EIST Function......................: [Disabled]
Virtualization Technology..............: [Disabled] << Enabled if you use Vmware/Virtual PC

> Integrated Peripherals
Legacy USB Storage Detect .............: [Disabled] << *Note* Must be enabled to flash from USB

[BoombasticSloth]

Re: GA-EP45-UD3P + 4GB/8GB Corsair Dominator DDR2 1066 Intermittent Problems

Try under clocking your memory as you are using 4x2gb ram. You can try changing your System Memory Multiplier from 3.200B to to lower Multi. eg. 2.40B, 2.00D,etc. If that doesn't work you also may need to increase your Stastic tRead from 8 to 9.

[Plexor]

Re: GA-EP45-UD3P + 4GB/8GB Corsair Dominator DDR2 1066 Intermittent Problems

Try under clocking your memory as you are using 4x2gb ram. You can try changing your System Memory Multiplier from 3.200B to to lower Multi. eg. 2.40B, 2.00D,etc. If that doesn't work you also may need to increase your Stastic tRead from 8 to 9.

I am running 2x2gb at the moment. I lowered my System Memory Multiplier from 3.20B to 2.40B and 2.00B--both had the same errors... finally I set 2.00B and set memory timings to Auto and the errors went away.. then I set back the settings in my original post and no errors are showing up now... i expect errors will show up again soon... when they do I will try changing the tRead value as you suggested and see what happens.

[Plexor]

Re: GA-EP45-UD3P + 4GB/8GB Corsair Dominator DDR2 1066 Intermittent Problems

I changed the tRead to 9 with 3.20B mult.... and I still get errors... I am running memtest86+ with tRead 9 and 2.00B mult...

for whatever reason the FSB drifts to 335/336 even with 333 set in bios... it is not something that happens consistently... sometimes it shows up as 333 in memtest86+

when the system starts (333x9.5) is shown on boot

[Plexor]

Re: GA-EP45-UD3P + 4GB/8GB Corsair Dominator DDR2 1066 Intermittent Problems

I just got a few errors on Test #7, tRead 9, System Memory Multiplier 2.00B (all other settings the same as OP.

The errors show up on both installed dimms. (slots 1 & 3)

[BoombasticSloth]

Re: GA-EP45-UD3P + 4GB/8GB Corsair Dominator DDR2 1066 Intermittent Problems

That is odd, as even with your original manual settings for standard and advanced memory timings they are pretty loose. Static tRead at 9 is forgiving, your only using 2x2gb of memory, mch core is more than enough at 1.24v (you may even try lowering it), vdimm is what your default recommended amount is I am assuming, the other bios settings don't seem unreasonable, and your only running at stock cpu speeds.....and even with lower system memory multi's it is still not working out...

Try one notch higher with your vcore... probably not the answer but just try it.

What power supply are you using, and may I ask what your temperatures are like?

[Plexor]

Re: GA-EP45-UD3P + 4GB/8GB Corsair Dominator DDR2 1066 Intermittent Problems

I added the PSU to the OP, Antec TP-750 (750Watt)

Temps:
Ambient: 28C
System: ~50C
CPU: ~50C

This ram is 2.10V

I just tried 1 notch higher of vcore, still get occasional errors on Memtest86+

[BoombasticSloth]

Re: GA-EP45-UD3P + 4GB/8GB Corsair Dominator DDR2 1066 Intermittent Problems

Psu is more than adequate.
I hope cpu temp of 50c is not at idle, seeing as your using an aftermarket hs, which I assume should be better than stock.
System at 50c, that is a bit high, even with ambient at 28c.

[BoombasticSloth]

Re: GA-EP45-UD3P + 4GB/8GB Corsair Dominator DDR2 1066 Intermittent Problems

Try with 400x8=3.2ghz. Want to try different memory latch and system memory multi.

BIOS SETTINGS

> MB Intelligent Tweaker(M.I.T.)
Robust Graphics Booster ...............: Auto
CPU Clock Ratio ..........................: [COLOR=Red]8[/COLOR]x
Fine CPU Clock Ratio.....................:.+0.[COLOR=Red]0[/COLOR]
CPU Frequency ...........................: 3.[COLOR=Red]2[/COLOR]GHz( 400x[COLOR=Red]8[/COLOR].0)


>> Clock Chip Control
>>>>> Standard Clock Control
CPU Host Clock Control.................: [Enabled]
CPU Host Frequency (Mhz) ..............: [COLOR=Red]400[/COLOR] Mhz
PCI Express Frequency (Mhz) ...........: 100

C.I.A.2 ...............................:[Disabled]

>>>>> Advanced Clock Control
> Advanced Clock Control [Press Enter]
CPU Clock Drive........................: 800mV
PCI Express Clock Drive................: 900mV
CPU Clock Skew (ps)....................: 0ps
MCH Clock Skew (ps)....................: 0ps


>> DRAM Performance Control
Performance Enhance....................: [STANDARD]
Extreme Memory Profile (X.M.P.)........: Disabled
(G)MCH Frequency Latch.................: [Auto]
System Memory Multiplier ..............: [[COLOR=Red]2.00D[/COLOR]]
Memory Frequency (Mhz) ................: [COLOR=Red]800[/COLOR]
DRAM Timing Selectable ................: [Manual]

>>>>> Standard Timing Control
CAS Latency Time.......................: 5 [ 5]
tRCD ..................................: 7 [ 5]
tRP'...................................: 7 [ 5]
tRAS...................................: 24 [ 15]

Set all Suggested below to highest Values first. Then later you can lower, one at a time, testing as you go

>>>>> Advanced Timing Control
> Advanced Timing Control [Press Enter]
tRRD...................................: 4 [ [COLOR=Red]Auto[/COLOR]]
tWTR...................................: 4 [ [COLOR=Red]Auto[/COLOR]]
tWR....................................: 8 [ [COLOR=Red]Auto[/COLOR]]
tRFC...................................: 68 [ [COLOR=Red]Auto[/COLOR]]
tRTP...................................: 4 [ [COLOR=Red]Auto[/COLOR]]
Command Rate (CMD) ....................: 0 [ 2]

Channel A
Driving Strength ......................: [1066MHz]

Static tRead Value.....................: 8 [ [COLOR=Red]9[/COLOR]][COLOR=Red]10,8[/COLOR]
tRD Phase0 Adjustment..................: 0 [Auto] 
tRD Phase1 Adjustment..................: 0 [Auto]
tRD Phase2 Adjustment ................: 0 [Auto]
tRD Phase3 Adjustment.................: 0 [Auto]
Trd2rd(Different Rank).................: 8 [Auto]
Twr2wr(Different Rank).................: 8 [Auto]
Twr2rd(Different Rank).................: 7 [Auto]
Trd2wr(Same/Diff Rank).................: 9 [Auto]
Dimm1 Clock Skew Control...............: [Auto]
Dimm2 Clock Skew Control...............: [Auto]

Channel B
Driving Strength ......................: [1066MHz]

Static tRead Value.....................: 8 [ [COLOR=Red]9[/COLOR]] [COLOR=Red]10[/COLOR],[COLOR=Red] 8[/COLOR]
tRD Phase0 Adjustment..................: 0 [Auto] 
tRD Phase1 Adjustment..................: 0 [Auto]
tRD Phase2 Adjustment ................: 0 [Auto]
tRD Phase3 Adjustment.................: 0 [Auto]
Trd2rd(Different Rank).................: 8 [Auto]
Twr2wr(Different Rank).................: 8 [Auto]
Twr2rd(Different Rank).................: 7 [Auto]
Trd2wr(Same/Diff Rank).................: 9 [Auto]
Dimm1 Clock Skew Control...............: [Auto]
Dimm2 Clock Skew Control...............: [Auto]

> Motherboard Voltage Control
>>> CPU
Load-Line Calibration..................: [Disabled]
CPU Vcore..............................: [COLOR=Red]1.200 [/COLOR]
CPU Termination........................: 1.200V 
CPU PLL................................: 1.500V 
[COLOR="Red"]CPU Reference........................: 0.76[/COLOR]

CPU Reference..........................: [COLOR=Red]0.760[/COLOR]V 
MCH Core...............................: [COLOR=Red]1.200[/COLOR]V 
MCH Reference..........................: [COLOR=Red]0.760[/COLOR]V  , [COLOR="Red"] 0.74[/COLOR]
MCH/DRAM Ref...........................: [COLOR=Red]1.05[/COLOR]V, 1.00
ICH I/O................................: 1.500V 
ICH Core...............................: 1.100V 

>>> DRAM
DRAM Voltage...........................: 1.800V [2.100V]
DRAM Termination.......................: 0.760V[COLOR="Red"]?[/COLOR] [[COLOR=Red]1.05[/COLOR]] 
Channel A Reference 0.900V.............: 0.900V [[COLOR=Red]1.05[/COLOR]] 
Channel B Reference 0.900V.............: 0.900V [[COLOR=Red]1.05[/COLOR]] 

> Advanced Settings
Limit CPUID Max. to 3..................: [Disabled]
No-Execute Memory Protect..............: [Enabled]
CPU Enhanced Halt (C1E)................: [Disabled]
C2/C2E State Support...................: [Disabled]
x C4/C4E State Support.................: [Disabled]
CPU Thermal Monitor 2(TM2) ............: [Enabled]
CPU EIST Function......................: [Disabled]
Virtualization Technology..............: [Disabled] 

> Integrated Peripherals
Legacy USB Storage Detect .............: [Disabled]

[Plexor]

Re: GA-EP45-UD3P + 4GB/8GB Corsair Dominator DDR2 1066 Intermittent Problems

Try with 400x8=3.2ghz. Want to try different memory latch and system memory multi.

BIOS SETTINGS

> MB Intelligent Tweaker(M.I.T.)
Robust Graphics Booster ...............: Auto
CPU Clock Ratio ..........................: [COLOR=Red]8[/COLOR]x
Fine CPU Clock Ratio.....................:.+0.[COLOR=Red]0[/COLOR]
CPU Frequency ...........................: 3.[COLOR=Red]2[/COLOR]GHz( 400x[COLOR=Red]8[/COLOR].0)


>> Clock Chip Control
>>>>> Standard Clock Control
CPU Host Clock Control.................: [Enabled]
CPU Host Frequency (Mhz) ..............: [COLOR=Red]400[/COLOR] Mhz
PCI Express Frequency (Mhz) ...........: 100

C.I.A.2 ...............................:[Disabled]

>>>>> Advanced Clock Control
> Advanced Clock Control [Press Enter]
CPU Clock Drive........................: 800mV
PCI Express Clock Drive................: 900mV
CPU Clock Skew (ps)....................: 0ps
MCH Clock Skew (ps)....................: 0ps


>> DRAM Performance Control
Performance Enhance....................: [STANDARD]
Extreme Memory Profile (X.M.P.)........: Disabled
(G)MCH Frequency Latch.................: [Auto]
System Memory Multiplier ..............: [[COLOR=Red]2.00D[/COLOR]]
Memory Frequency (Mhz) ................: [COLOR=Red]800[/COLOR]
DRAM Timing Selectable ................: [Manual]

>>>>> Standard Timing Control
CAS Latency Time.......................: 5 [ 5]
tRCD ..................................: 7 [ 5]
tRP'...................................: 7 [ 5]
tRAS...................................: 24 [ 15]

Set all Suggested below to highest Values first. Then later you can lower, one at a time, testing as you go

>>>>> Advanced Timing Control
> Advanced Timing Control [Press Enter]
tRRD...................................: 4 [ [COLOR=Red]Auto[/COLOR]]
tWTR...................................: 4 [ [COLOR=Red]Auto[/COLOR]]
tWR....................................: 8 [ [COLOR=Red]Auto[/COLOR]]
tRFC...................................: 68 [ [COLOR=Red]Auto[/COLOR]]
tRTP...................................: 4 [ [COLOR=Red]Auto[/COLOR]]
Command Rate (CMD) ....................: 0 [ 2]

Channel A
Driving Strength ......................: [1066MHz]

Static tRead Value.....................: 8 [ [COLOR=Red]9[/COLOR]][COLOR=Red]10,8[/COLOR]
tRD Phase0 Adjustment..................: 0 [Auto] 
tRD Phase1 Adjustment..................: 0 [Auto]
tRD Phase2 Adjustment ................: 0 [Auto]
tRD Phase3 Adjustment.................: 0 [Auto]
Trd2rd(Different Rank).................: 8 [Auto]
Twr2wr(Different Rank).................: 8 [Auto]
Twr2rd(Different Rank).................: 7 [Auto]
Trd2wr(Same/Diff Rank).................: 9 [Auto]
Dimm1 Clock Skew Control...............: [Auto]
Dimm2 Clock Skew Control...............: [Auto]

Channel B
Driving Strength ......................: [1066MHz]

Static tRead Value.....................: 8 [ [COLOR=Red]9[/COLOR]] [COLOR=Red]10[/COLOR],[COLOR=Red] 8[/COLOR]
tRD Phase0 Adjustment..................: 0 [Auto] 
tRD Phase1 Adjustment..................: 0 [Auto]
tRD Phase2 Adjustment ................: 0 [Auto]
tRD Phase3 Adjustment.................: 0 [Auto]
Trd2rd(Different Rank).................: 8 [Auto]
Twr2wr(Different Rank).................: 8 [Auto]
Twr2rd(Different Rank).................: 7 [Auto]
Trd2wr(Same/Diff Rank).................: 9 [Auto]
Dimm1 Clock Skew Control...............: [Auto]
Dimm2 Clock Skew Control...............: [Auto]

> Motherboard Voltage Control
>>> CPU
Load-Line Calibration..................: [Disabled]
CPU Vcore..............................: [COLOR=Red]1.200 [/COLOR]
CPU Termination........................: 1.200V 
CPU PLL................................: 1.500V 
[COLOR=Red]CPU Reference........................: 0.76[/COLOR]

CPU Reference..........................: [COLOR=Red]0.760[/COLOR]V 
MCH Core...............................: [COLOR=Red]1.200[/COLOR]V 
MCH Reference..........................: [COLOR=Red]0.760[/COLOR]V  , [COLOR=Red] 0.74[/COLOR]
MCH/DRAM Ref...........................: [COLOR=Red]1.05[/COLOR]V, 1.00
ICH I/O................................: 1.500V 
ICH Core...............................: 1.100V 

>>> DRAM
DRAM Voltage...........................: 1.800V [2.100V]
DRAM Termination.......................: 0.760V[COLOR=Red]?[/COLOR] [[COLOR=Red]1.05[/COLOR]] 
Channel A Reference 0.900V.............: 0.900V [[COLOR=Red]1.05[/COLOR]] 
Channel B Reference 0.900V.............: 0.900V [[COLOR=Red]1.05[/COLOR]] 

> Advanced Settings
Limit CPUID Max. to 3..................: [Disabled]
No-Execute Memory Protect..............: [Enabled]
CPU Enhanced Halt (C1E)................: [Disabled]
C2/C2E State Support...................: [Disabled]
x C4/C4E State Support.................: [Disabled]
CPU Thermal Monitor 2(TM2) ............: [Enabled]
CPU EIST Function......................: [Disabled]
Virtualization Technology..............: [Disabled] 

> Integrated Peripherals
Legacy USB Storage Detect .............: [Disabled]

I just tried that and still get errors =/

[BoombasticSloth]

Re: GA-EP45-UD3P + 4GB/8GB Corsair Dominator DDR2 1066 Intermittent Problems

It is giving me a headache as this intermittent problem seems to be so irratic.

Do you have access to another computer to test your memory? Do you have access to another set of memory to test on you mobo?

Those bios settings that we tried are very relaxed and forgiving and given what you have mentioned about the nature of the intermittent problem, I am wondering if there is a short in your system somewhere. Do you recall if any hardware changes were made to your computer before all this irratic behavior started?

Another thing is to test for other faulty hardware. Can you unplug all of your non-essential hardware from your computer, ie. both hard drives, floppy, peripheral cards, optical drive , open your side panels, unplug case fans, etc. and run memtest each time after you unplug each hardware item. Do you recall which test number from memtest gave you the errors? Try going directly to that test to save time. It might help you troubleshoot if one of your hardware is causing the problem. Ie. if you pull out a hd, and then memtest runs problem free, then it may be the hd that is causing the problem. If there doesn't appear to be anything wrong with the peripheral items, then you may test if there is short between your mobo and your case. For that you have to pull the mobo out of the case and set up the computer on an open desktop. Set the mobo on the non-static bag that came with your mobo. Just plug in the essentials to get your computer to run memtest and see how that goes.

Tip: Load memtest on a usb stick, floppy, and/or cd. This way you can use memtest from a floppy or an usb stick when you unplug your optical drive. You get the idea....

Good luck.

[BoombasticSloth]

Re: GA-EP45-UD3P + 4GB/8GB Corsair Dominator DDR2 1066 Intermittent Problems

Seems like somebody else is having problems with Dominator ram as well.....

http://forums.tweaktown.com/f69/ga-ep45-ud3r-4x2gb-dominator-32687/

[Plexor]

Re: GA-EP45-UD3P + 4GB/8GB Corsair Dominator DDR2 1066 Intermittent Problems

I pulled the mobo out and set it on the antistatic bag, plugged in power and my gfx card. 2 dimms are installed (same as before)....

I set up a USB memtest86+ boot stick..

so far no errors in 2 hrs of testing with memtest86+... this doesn't really mean anything, however, as my system was resting a while and before i have had days of running memtest86+ without errors....

i will let this run a few hours and see if any errors pop up... if not, i will plug in the hdd and boot up for further tests.

[BoombasticSloth]

Re: GA-EP45-UD3P + 4GB/8GB Corsair Dominator DDR2 1066 Intermittent Problems

Hope it works out and you are able to find the beastie.
Good luck.

ps. since you have everything open, you may also test each of your voltage rails with a digital multimeter when under load, just to rule out psu.

[Plexor]

Re: GA-EP45-UD3P + 4GB/8GB Corsair Dominator DDR2 1066 Intermittent Problems

I have been running Memtest86+ for 14 hrs (24 passes)... 375 errors.

I was running same bios settings as the original post except I manually set the termination voltages to what you said on your earlier post. I don't have a DMM at the moment. I am going to buy one today.

Do you think it is even possible that the PSU could cause this?

The error rate right now is much lower than before, but it is still there.

I don't understand why my bios even shows 5-7-7-24 timing as 'auto values' right now for ram..sometimes is shows proper values of 5-5-5-15.

Here are the settings I used on my test with motheboard outside of case and just GFX, RAM, USB Keyboard and USB stick plugged in:

BIOS SETTINGS

> MB Intelligent Tweaker(M.I.T.)
Robust Graphics Booster ...............: Auto
CPU Clock Ratio ..........................: 9x
Fine CPU Clock Ratio.....................:.+0.5
CPU Frequency ...........................: 3.16GHz( 333x9.5)


>> Clock Chip Control
>>>>> Standard Clock Control
CPU Host Clock Control.................: [Enabled]
CPU Host Frequency (Mhz) ..............: 333 Mhz
PCI Express Frequency (Mhz) ...........: 100

C.I.A.2 ...............................:[Disabled]

>>>>> Advanced Clock Control
> Advanced Clock Control [Press Enter]
CPU Clock Drive........................: 800mV
PCI Express Clock Drive................: 900mV
CPU Clock Skew (ps)....................: 0ps
MCH Clock Skew (ps)....................: 0ps


>> DRAM Performance Control
Performance Enhance....................: [STANDARD]
Extreme Memory Profile (X.M.P.)........: Disabled
(G)MCH Frequency Latch.................: [Auto]
System Memory Multiplier ..............: [3.20B]
Memory Frequency (Mhz) ................: 1066
DRAM Timing Selectable ................: [Manual]

>>>>> Standard Timing Control
CAS Latency Time.......................: 5 [ 5]
tRCD ..................................: 7 [ 5]
tRP'...................................: 7 [ 5]
tRAS...................................: 24 [ 15]

Set all Suggested below to highest Values first. Then later you can lower, one at a time, testing as you go

>>>>> Advanced Timing Control
> Advanced Timing Control [Press Enter]
tRRD...................................: 4 [ 4]
tWTR...................................: 4 [ 4]
tWR....................................: 8 [ 8]
tRFC...................................: 68 [ 68]
tRTP...................................: 4 [ 4]
Command Rate (CMD) ....................: 0 [ 2]

Channel A
Driving Strength ......................: [1066MHz]

Static tRead Value.....................: 8 [ 9]
tRD Phase0 Adjustment..................: 0 [Auto] <<< Leave for all below as well
tRD Phase1 Adjustment..................: 0 [Auto]
tRD Phase2 Adjustment ................: 0 [Auto]
tRD Phase3 Adjustment.................: 0 [Auto]
Trd2rd(Different Rank).................: 8 [Auto]
Twr2wr(Different Rank).................: 8 [Auto]
Twr2rd(Different Rank).................: 7 [Auto]
Trd2wr(Same/Diff Rank).................: 9 [Auto]
Dimm1 Clock Skew Control...............: [Auto]
Dimm2 Clock Skew Control...............: [Auto]

Channel B
Driving Strength ......................: [1066MHz]

Static tRead Value.....................: 8 [ 9]
tRD Phase0 Adjustment..................: 0 [Auto] <<< Leave for all below as well
tRD Phase1 Adjustment..................: 0 [Auto]
tRD Phase2 Adjustment ................: 0 [Auto]
tRD Phase3 Adjustment.................: 0 [Auto]
Trd2rd(Different Rank).................: 8 [Auto]
Twr2wr(Different Rank).................: 8 [Auto]
Twr2rd(Different Rank).................: 7 [Auto]
Trd2wr(Same/Diff Rank).................: 9 [Auto]
Dimm1 Clock Skew Control...............: [Auto]
Dimm2 Clock Skew Control...............: [Auto]

> Motherboard Voltage Control
>>> CPU
Load-Line Calibration..................: [Disabled]
CPU Vcore..............................: 1.18750V [1.18750V]
CPU Termination........................: 1.200V [1.200V] << If overclocking Please set to stock, Auto overvolts this way to much. Optimal range for overclock would be 1.2-1.5 depending on Vcore, try to keep at least .1 under vcore. Auto is fine if not overclocking
CPU PLL................................: 1.500V [1.500V] << If overclocking Please set to stock, Auto overvolts this way to much. Optimal range for overclock would be 1.5-1.65. Auto is fine if not overclocking

CPU Reference..........................: 0.760V [0.760V] << .64% Of Vtt (Termination above) Auto Will set this correctly
>>> MCH/ICH
MCH Core...............................: 1.100V [1.100V]
MCH Reference..........................: 0.760V [0.760V]
MCH/DRAM Ref...........................: 0.900V [1.050V]
ICH I/O................................: 1.500V [1.500V]
ICH Core...............................: 1.100V [1.100V]

>>> DRAM
DRAM Voltage...........................: 1.800V [2.100V]
DRAM Termination.......................: 0.900V [1.050V] << Leave
Channel A Reference 0.900V.............: 0.900V [1.050V] << Leave
Channel B Reference 0.900V.............: 0.900V [1.050V] << Leave

> Advanced Settings
Limit CPUID Max. to 3..................: [Disabled]
No-Execute Memory Protect..............: [Enabled]
CPU Enhanced Halt (C1E)................: [Disabled]
C2/C2E State Support...................: [Disabled]
x C4/C4E State Support.................: [Disabled]
CPU Thermal Monitor 2(TM2) ............: [Enabled]
CPU EIST Function......................: [Disabled]
Virtualization Technology..............: [Disabled] << Enabled if you use Vmware/Virtual PC

> Integrated Peripherals
Legacy USB Storage Detect .............: [Disabled] << *Note* Must be enabled to flash from USB