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Q6600 - GA-EP45-UD3R Overclock (System Stops responding)

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December 31, 2009 5:19:22 PM

Hi All,

First time over-clocker here. Been reading up and found some settings that seemed to work for me:

RAM: 2 kits of OCZ: Newegg.com - OCZ Reaper HPC 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Dual Channel Kit Desktop Memory Model OCZ2RPR10664GK - Desktop Memory


MB Intelligent Tweaker(M.I.T.)
Robust Graphics Booster ...............: Auto
CPU Clock Ratio ..........................: 8x
Fine CPU Clock Ratio.....................:.0
CPU Frequency ...........................: 400


Clock Chip Control
Standard Clock Control
CPU Host Clock Control..................: [Enabled]
CPU Host Frequency (Mhz) ............: 400Mhx
PCI Express Frequency (Mhz) .........:100

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


Advanced Clock Control [Press Enter]
CPU Clock Drive...........................: <<< 700
PCI Express Clock Drive.................: <<< 700
CPU Clock Skew (ps)....................: <<< 0
MCH Clock Skew (ps)...................: <<< 0


DRAM Performance Control
Performance Enhance...................: [STANDARD]
Extreme Memory Profile (X.M.P.).....: Disabled
(G)MCH Frequency Latch...............: 400
System Memory Multiplier ..............: 2.66D
Memory Frequency (Mhz) ..............: 1066
DRAM Timing Selectable ................: [Manual]

Standard Timing Control
CAS Latency Time........................5
tRCD .........................................5
tRP'...........................................5
tRAS..........................................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
tRRD..........................................AUTO
tWTR..........................................AUTO
tWR............................................AUTO
tRFC...........................................54
tRTP...........................................AUTO
Command Rate (CMD) ....................:2

Driving Strength Profiles
Driving Strength 1066

Channel A
Static tRead Value.........................:10
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.........................:10
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

CPU
CPU Vcore….……….........................:1.31250V

CPU Termination…..... 1.200V*.......: 1.240V<< 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 1.500V

CPU Referen.…………....,,0.760V.....:AUTO

CPU Reference2………,,0.800V*.......:AUTOcorrectly

MCH/ICH
MCH Core…………….....1.100V...........: << AUTO
MCH Reference….…….0.760V...........; <<< AUTO
MCH/DRAM Ref.…......0.900V...........: <<< Leave
ICH I/O……………….....1.500V............: <<< Leave
ICH Core…………...……1.100V............: <<< Leave

DRAM
DRAM Voltage ……....1.800V............: 2.000V
DRAM Termination .…0.900V............: <<< Leave
Channel A Reference 0.900V............: <<< Leave
Channel B Reference 0.900V............: <<< Leave

I was able to run Prime 95 for about 8 hours stable when the comp stopped responding, I was recording the temps and the highest Cores (0+1) were at 59 and would max at 60. I am wondering if you have any advice.

CPU-Z reports a lower voltage. Anyone have any help for me?

a b à CPUs
a b K Overclocking
a b } Memory
January 13, 2010 4:33:08 PM

I have had limited success with multiple motherboards using a q6600. I never got past 3.0ghz on one board, got to 3.15ghz on one more, and got to 3.6ghz on a different one. When I researched my own problems, I found that some of these chips don't get past 3.0ghz. It's just bad luck. I have G0 stepping too. I can only get to 3.6ghz with vcore at 1.40, its too hot to run all the time like this, but in the winter it heats my office nicely :)  Try upping the vcore and see what happens.

Try slower RAM values, like 6-6-6-24, or slower. Also try the memory divider at 2.0, yes the RAM will run slower, but if it works, you can then work on the timings to make back up for the lost speed (small amount anyways)
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