E8500 overclock on GA-EP45-UD3P

[dvohwinkel]

I have a E8500 E0 stepping on a GA-EP45-UD3P, with Crucial Balistic DDR2-6400 (2G x 2) and a XFX Geforce 260/216...

Using Lsdmeasap MOST excellent guide to my memory.. and setting for it.. I have gotten to 500 FSB with the memory running @ 1000...

http://forums.tweaktown.com/f58/crucial-ballistix-memory-stability-testing-review-30086/

The problem I have is that I don't understand the System Memory Multiplier.. I have it set to 2.00D but I really don;t understand why.. why yes I am a "noob" My proc I think has a 1333 FSB.. so by running at 2.00D doesn't that drop it to 1000? though my memory is much faster like this..

Anyway.. I can overclock the E8500 to 3.5Ghz with these settings.. which are just for the memory.. but I seem to have issues going higher.. I really want 4-4.2Ghz

What should I try? Just bosting the Vcore doesn;t seem to help...

MB Intelligent Tweaker(M.I.T.)
Robust Graphics Booster ...............: Auto
CPU Clock Ratio ..........................: 6
Fine CPU Clock Ratio.....................:.0
CPU Frequency ...........................: 3.00Ghz


Clock Chip Control 
Standard Clock Control
CPU Host Clock Control..................: [Enabled] 
CPU Host Frequency (Mhz) ............: 500Mhz
PCI Express Frequency (Mhz) .........:Set to 100

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


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


DRAM Performance Control
Performance Enhance...................: [STANDARD]
Extreme Memory Profile (X.M.P.).....: Disabled
(G)MCH Frequency Latch...............: [Auto]
System Memory Multiplier ..............: 2.00D 

Memory Frequency (Mhz) ..............: 1000Mhz
DRAM Timing Selectable ................: [Manual]

Standard Timing Control
CAS Latency Time........................ 5
tRCD ......................................... 5
tRP'........................................... 5
tRAS.......................................... 15


Advanced Timing Control
tRRD........................................... 3
tWTR.......................................... 4
tWR............................................ 6
tRFC........................................... 54
tRTP........................................... 3
Command Rate (CMD) ....................:2

Driving Strength Profiles
Driving Strength ............................ 1066

Channel A
Static tRead Value.........................:11 [Auto]  ????????????    7/8-9 (Depending on other voltages and strap being used)

 tRD Phase0 Adjustment...................:Auto <<< Leave for all below as well
tRD Phase1 Adjustment...................:Auto
 tRD Phase2 Adjustment .................:Auto
 tRD Phase3 Adjustment..................:Auto
Trd2rd(Different Rank)....................:Auto 
Twr2wr(Different Rank)...................:Auto 
Twr2rd(Different Rank)...................:Auto 
Trd2wr(Same/Diff Rank)..................:Auto 
Dimm1 Clock Skew Control...............:Auto  ps
Dimm2 Clock Skew Control...............:Auto  ps

Channel B
Static tRead Value.........................:11 [Auto] ????????????????  7/8-9 (Depending on other voltages and strap being used)

 tRD Phase0 Adjustment...................:Auto <<< Leave for all below as well
tRD Phase1 Adjustment...................:Auto
 tRD Phase2 Adjustment .................:Auto
 tRD Phase3 Adjustment..................:Auto
Trd2rd(Different Rank)....................:Auto 
Twr2wr(Different Rank)...................:Auto 
Twr2rd(Different Rank)...................:Auto 
Trd2wr(Same/Diff Rank)..................:Auto 
Dimm1 Clock Skew Control...............:Auto  ps
Dimm2 Clock Skew Control...............:Auto  ps

Motherboard Voltage Control
Voltage Type.���... Manual
CPU
CPU Vcore�.���.........................: 1.25000V  [Normal]  
CPU Termination�..... 1.200V*.......: 1.200V  [Normal]  << 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  [Normal]   << 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 Referen.����....0.755V*.......: 0.760V  [Normal]   <<< .64% Of Vtt (Termination above) Auto Will set this correctly 


MCH/ICH
MCH Core�����.....1.100V...........: [1.220V]  << 1.2-1.26 (amount needed will depend on Strap used and tRD used)

MCH Reference�.��.0.800V...........; [0.800V] <<< May need adjusted, depends on your board and CPU being used, and all other voltages.  See my signature for how to adjust.

MCH/DRAM Ref.�......0.900V...........: 0.900V  [Normal] <<< Leave
ICH I/O������.....1.550V............: [1.500V] <<< 1.5-1.55
ICH Core����...��1.100V............: [1.200V] <<< 1.14-1.2

DRAM
DRAM Voltage ��....1.800V............: 2.04V (2.05V May be needed)
DRAM Termination .�0.900V............: <<< Leave
Channel A Reference 0.900V............: <<< Leave
Channel B Reference 0.900V............: <<< 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

[NimrodAUS]

Re: E8500 overclock on GA-EP45-UD3P

Im no expert but I think you are possibly going about it the wrong way with a low multi and high FSB. Once you get up to that 500Mhz range things start to get funky. I would drop your FSB to 400 and up your CPU Mulitiplier to the 9.5 and that will give you 3.8Ghz on Stock Voltage. Well mine does anyway. Then Change your memory multiplier to 3.3D if there is such a thing?? It should show you in that section what your Memory clock will be. Im sure LSD withh chime in with the correct answer soon.

EDIT: Hang on a second. Your memory is only 800Mhz. Mate just set FSB to 400Mhz, PCI Express Speed to 100Mhz, Memory Multi to 2.0D. Start off with maybe a CPU Mulit of just 9 and that will give you 3.6Ghz. See how that runs. Then bump to 9.5 and see. You may need to bump up some MB voltages ive got +0.01v on MHC.

[dvohwinkel]

Re: E8500 overclock on GA-EP45-UD3P

I hope I can keep part of the FSB boost.. memtest86+ showed a 76.6% boost in memory throughput with a FSB of 550.. which was pretty sweet.. of course I changed something with out writing it down... and now I am working my way back to 500 FSB... I'm very close on that. LSD you around? :))

Im no expert but I think you are possibly going about it the wrong way with a low multi and high FSB. Once you get up to that 500Mhz range things start to get funky. I would drop your FSB to 400 and up your CPU Mulitiplier to the 9.5 and that will give you 3.8Ghz on Stock Voltage. Well mine does anyway. Then Change your memory multiplier to 3.3D if there is such a thing?? It should show you in that section what your Memory clock will be. Im sure LSD withh chime in with the correct answer soon.

EDIT: Hang on a second. Your memory is only 800Mhz. Mate just set FSB to 400Mhz, PCI Express Speed to 100Mhz, Memory Multi to 2.0D. Start off with maybe a CPU Mulit of just 9 and that will give you 3.6Ghz. See how that runs. Then bump to 9.5 and see. You may need to bump up some MB voltages ive got +0.01v on MHC.

[NimrodAUS]

Re: E8500 overclock on GA-EP45-UD3P

Well If you can get it stable at that sorta FSB then go for it. Yeah the E8500 is a great chip for overclocking, mine is @ 3.8ghz with air, it idles around 36ish and max load @ 55-60c

[dvohwinkel]

Re: E8500 overclock on GA-EP45-UD3P

Is that stock settings? Can you share your tweaks?

Well If you can get it stable at that sorta FSB then go for it. Yeah the E8500 is a great chip for overclocking, mine is @ 3.8ghz with air, it idles around 36ish and max load @ 55-60c

[NimrodAUS]

[profJim]

Re: E8500 overclock on GA-EP45-UD3P

There are 2 multipliers that are used to tweak system performance:
CPU Clock Ratio and System Memory Multiplier

CPU Host Frequency is used by both of these multipliers.

CPU Host Frequency X CPU Clock Ratio = CPU Frequency
and
CPU Host Frequency X System Memory Multiplier = Memory Frequency

For example: 500 MHz X 7.5 = 3.750 GHz (3750 MHz) CPU Frequency
................. 500 MHz X 2.0D (or 2.0B) = 1000 MHz Memory Frequency

Quality DDR2-800 ram can often run at 1000 MHz and possibly higher.

Once your system is stable, you can further improve memory performance by tweaking memory sub-timings.

tRD (Static tRead Value or Performance Level) and tRFC have the most significant effect on memory performance after your primary memory timings (5-5-5-15 in your case) have been tested to be fully stable.

With my setup, tRD = 9 and tRFC = 48 provide the best performance. These values are not guaranteed, even if someone has an identical setup. With most memory timings, lower = higher performance, up to a point. If only one setting is set too tight (too low), instability and/or reboot problems will occur. All this is covered in LSDME's Bios Tweaking Guide.

[CaptainJorge]

Re: E8500 overclock on GA-EP45-UD3P

Thanks NimrodAUS! I just used the settings you provided on my setup, which is also an E8500 on the GA-EP45-UD3P. I followed all your same settings, except for my ram, which is 4-4-4-12 and I left the sub-timings on auto. I've got a nice, cool 3.8 OC now. Idles at 35C and hasn't passed 45C under load.

[NimrodAUS]

Re: E8500 overclock on GA-EP45-UD3P

Hey Buddy Nice one. Thanks for letting me know how you went. Really Glad I could help you out.