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GA-EP45-UD3P Rev. 1.1 F6 Q9550 4GHz

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Old 27-10-2010
Join Date: Sep 2010
Posts: 64
GA-EP45-UD3P Rev. 1.1 F6 Q9550 4GHz

I am extremely stable to 4GHz but I am not getting my work done for any more. My CPU temperature is 56C. I want to replace my Zalman fan and put a cooler on it (Titan Fenrir xmas) rpm is slower so I think another 120mm Fan might be needed. Goal is 4GHz stable overclock and I need to get 470FSB speed and currently I am having a 440FSB. any help to this would be really appreciated. Thank you in advance for your valuable suggestions.

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Old 27-10-2010
Join Date: May 2008
Posts: 657
Re: GA-EP45-UD3P Rev. 1.1 F6 Q9550 4GHz

I need to see your settings to answer this question. But if you are using 2.20B multiplier then you would need to use 2.00B and trd also need to be change. MCH voltage may also need to increase. But as I mention we need to see your full settings but you will not need to do much changes aside then few things as you are testing for stability.
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Old 27-10-2010
Join Date: Sep 2010
Posts: 64
Re: GA-EP45-UD3P Rev. 1.1 F6 Q9550 4GHz

I have the following settings.Patroit 4GB 5-5-5-18 1066 2.0v is my RAM.
RGB Turbo
Cpu ratio :8x
fine cpu ratio: 0.5
cpu frequency: 4.00GHz (471x8.5)

cpu host control: enabled
cpu host frequency(MHz): 470
pci express frequency(MHz): 100
cia2: Disabled
advanced clock control cpu clock drive 800mV
pci express clock drive 900mV
cpu clock skew 0pS mch clock skew 0pS

performance enhance Turbo
XMP disabled
system memory multiplier :2.00B
memory frequency(MHz) :1066 942
dram timing selectable :manual
cas latency time: 5
trcd :5
trp: 5
tras: 18
advanced timing control all set on auto

mch core: 1.100v 1.360v
mch reference :0.760v 0.863v
ich i/o 0.900v :auto
ich core 1.500v :auto

dram voltage 1.800v :2.100v
All other dram setting AUTO
If you have any other question to ask I will be happy to answer.
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Old 27-10-2010
Join Date: Dec 2007
Posts: 1,741
Re: GA-EP45-UD3P Rev. 1.1 F6 Q9550 4GHz

TRD 9 at 450 was fairly easy this will take a bit opf tweaking to get it at 2000 FSB.Using with a 8.5 multiplier for 4GHz and getting 1800 FSB. YOu should get away with much lower mchv probably 1.25 or less would be fine. You can try something mch below 1.5, 480-490 CPU ref with 8.5 multiplier, CPU at around 1.4 or 1.43v and memory at 2.5v or below then this, multiplier should give a realistic performance.
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Old 27-10-2010
Join Date: Dec 2007
Posts: 996
Re: GA-EP45-UD3P Rev. 1.1 F6 Q9550 4GHz

Following settings are stable enough for my Q9550 to pass 24 hours of Prime95 small and large FFT's and 18 passes of Linx with maximum memory.
Robust Graphics Booster: FAST
CPU Clock Ratio : 8
Fine Clock Ratio :0.5
CPU Host Clock Control:Enabled
CPU Host Frequency (MHz): 399 or 401
PCI Express Frequency (Mhz):100
C.I.A. 2: Disabled
System Memory Multiplier (SPD): 2.00B or D = 800MhzDRAM Timing
Selectable SPD :Manual

Advanced Clock Control
CPU Clock Drive: 800mv
PCI Express Clock Drive:900mv
CPU Clock Skew: 0ps
MCH Clock Skew: 0ps

Performance Enhance : Standard
CAS Latency Time: 5
Dram RAS# to CAS# Delay: 5
Dram RAS# Precharge Delay:5
Precharge Delay (tRAS):18

ACT to ACT Delay (tRRD): 3-4
Rank Write to READ Delay:3-6
Write to Precharge Delay: 4-8
Refresh to ACT Delay: 50-60
Read to Precharge Delay: 3-6
Static tRead Value:6-8
Static tRead Phase Adjust: Auto

Advanced Timing Control
tRRD: 3
tWR: 6
tRFC: 50
tRTP: 3
Command Rate (cmd): Auto

System Voltage Control: Manual
DDR2 OverVoltage Control:+0.300V = 2.1V
PCI-E OverVoltage Control: Auto
FSB OverVoltage Control:+0.1V
(G)MCH OverVoltage Control: +0.2-0.3V
CPU Voltage Control:1.25
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
When running Linx seems little bit warm but all the fans are running or set to silent speed.

Last edited by SUpER CoP : 27-10-2010 at 08:46 PM.
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