Overclocking E8500 on EP45-DS3

[Chike]

Re: Overclocking E8500 on EP45-DS3

I make it the forst failed on 800k then the other I can't tell.
Lts try to wwork the references, begin with MCH Reference. The reverences are percent of VTT, not to get confused always change them with VTT set to 1.2v. Above or below default may work so need to experiment.
The procedure as follows:
Set VTT to 1.2v.
Set reference voltage to desired value.
Restore VTT to it's original value (note that the reference will scale with VTT).

Start with MCH Reference, 1-4 steps below default which is 0.760v, then 1-4 above default if none of those made things better.
It may be that the system will become more stable but not completely stable. In that case repeat the same with CPU Reference with MCH Reference that is most stable.

[gile]

[Chike]

Re: Overclocking E8500 on EP45-DS3

With VTT alwayts at 1.2V?
Try to run small FTT see if that work longer.

[profJim]

Re: Overclocking E8500 on EP45-DS3

Some have stability problems with FSB = 400, try setting FSB = 401 and retest.

There is nothing magical with FSB = 401, it's just that 400 sometimes causes problems.

Did you test with MCH Ref 2, 3, or 4 steps lower than the standard .760 setting as Chike suggested?

Another test option is to switch to the 2.00B memory multiplier and retest if the lower MCH Ref tests all fail.

[gile]

Re: Overclocking E8500 on EP45-DS3

Yes VTT always at 1.200V. I did test with MCH Ref 2, 3, or 4 steps lower than the standard .760 setting as Chike suggested but my current FSB is 422!

[Chike]

Re: Overclocking E8500 on EP45-DS3

Try what profJim suggested, the 2.00B multiplier.
See if forcing 800K FFT speeds the failure.
Select custom, and set min and max FFT to 800.

[gile]

Re: Overclocking E8500 on EP45-DS3

I have set the 2.00B multiplier, and set min and max FFT to 800.

[Chike]

Re: Overclocking E8500 on EP45-DS3

Ah, good no need to wait too long.
<s>Have you tried the 2,00B multiplier?</s>
LOL I must stop doing it.
Try a higher VTT.

[gile]

Re: Overclocking E8500 on EP45-DS3

Should I set back the 2.00D multiplier, because for B-multiplier the RAm fsb is 333? Higher VTT then try all the combinations with MCH reference?

[Chike]

Re: Overclocking E8500 on EP45-DS3

No, it's the bus frequency that makes the difference.
Try with VTT 1.22, then a bit more vcore just to make sure it's not it.

[gile]

Re: Overclocking E8500 on EP45-DS3

Setting the VTT to 1.22 caused boot failure, so I raised Vcore and just passed prime95 custom test with FFT 800K without errors or warnings. Is it normal for screen to flicker during boot? My current Bios settings are:
MB Intelligent Tweaker(M.I.T.)
Robust Graphics Booster ...............: Auto
CPU Clock Ratio ..........................: x9
Fine CPU Clock Ratio.....................:.0.5
CPU Frequency ...........................: 4.00GHz [422x9]

Clock Chip Control
Standard Clock Control
CPU Host Clock Control..................: [Enabled]
CPU Host Frequency (Mhz) ............:422 MHz
PCI Express Frequency (Mhz) .........: 100

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

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...............: [400MHz]
System Memory Multiplier ..............: (2.00D)
Memory Frequency (Mhz) ..............: 844
DRAM Timing Selectable ................: [Manual]

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

Advanced Timing Control
tRRD........................................... Auto
tWTR.......................................... Auto
tWR............................................ Auto
tRFC........................................... Auto
tRTP........................................... Auto
Command Rate (CMD) ....................: Auto

Driving Strength Profiles
Driving Strength ............................ Auto

Channel A default / current
Static tRead Value.........................:11 [ 9 ]
tRD Phase0 Adjustment...................:Auto
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 default / current
Static tRead Value.........................: 11 [ 9 ]
tRD Phase0 Adjustment...................:Auto
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
CPU
CPU Vcore….………......1.225V ......: [1.39375V]
CPU Termination…..... 1.200V*.......: [ 1.220V ]
CPU PLL…………………....1.500V*.......: [ 1570V ]
CPU Referen.…………....0.760V*.......: [ 0.757V ]

MCH/ICH
MCH Core…………….....1.100V...........: [ 1280V ]
MCH Reference….…….0.760V...........; [0.732V ]
MCH/DRAM Ref.…......0.900V...........: [ Auto ]
ICH I/O……………….....1.500V............: [ Auto ]


DRAM
DRAM Voltage ……....1.800V............: [2.180V ]
DRAM Termination .…0.900V............: [ Auto ]
Channel A Reference 0.900V............: [ Auto ]
Channel B Reference 0.900V............: [ Auto ]

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]

[Chike]

Re: Overclocking E8500 on EP45-DS3

Try the same the 1.2VTT. The references are tide to VTT so they may need to be changed at different VTT values.
Flicker how?

[gile]

Re: Overclocking E8500 on EP45-DS3

I will try mch reference from 1-4 below default and 1-4 above default, then the same with cpu reference. The only difference will be higher vcore? I restart , bios read ok, but when it starts showing the windows logo the screen flickers twice-once upon showing the logo, and second time just before log on. I will try to film it then upload.

[Chike]

Re: Overclocking E8500 on EP45-DS3

Try just more vcore with the same settings u had before (as you posted).
Then try the same reference procedure with 1.22v VTT and so on. Just remember to make the changes at 1.2v VTT.
also list the values of references for 1.2v VTT (eg. 0.72 @ 1.2 VTT), it's more clear and easy to understand.
For better understand of what they actually do you can read Understanding GTL Reference Voltage.

[gile]