THE Asus P5E X38 Thread

[JustMe2]

Extreme Tweaker
Ai Overclock Tuner : Manual
CPU Ratio Control : Manual
- Ratio CMOS Setting : 8
FSB Frequency : 425
FSB Strap to North Bridge : AUTO
PCI-E Frequency: 100
DRAM Frequency: DDR2- 425
DRAM Command Rate : 2t
DRAM Timing Control: Manual
CAS# Latency : 4
RAS# to CAS# Delay : 4
RAS# Precharge : 4
RAS# ActivateTime : 12
RAS# to RAS# Delay : AUTO
Row Refresh Cycle Time : AUTO
Write Recovery Time : AUTO
Read to Precharge Time : AUTO

Read to Write Delay (S/D) : AUTO
Write to Read Delay (S) : AUTO
Write to Read Delay (D) : AUTO
Read to Read Delay (S) : AUTO
Read to Read Delay (D) : AUTO
Write to Write Delay (S) : AUTO
Write to Write Delay (D) : AUTO
DRAM Static Read Control: AUTO
Ai Clock Twister : AUTO
Transaction Booster : AUTO

CPU Voltage : 1.55(highest I've tried)
CPU PLL Voltage : 1.8(highest I've tried)
North Bridge Voltage : 1.45(highest I've tried)
DRAM Voltage : 2.2v
FSB Termination Voltage : 1.5(max)
South Bridge Voltage : AUTO
Loadline Calibration : Enabled
CPU GTL Reference : .63x
North Bridge GTL Reference : .67x
SB 1.5V Voltage : AUTO

CPU Spread Spectrum : Disabled
PCIE Spread Spectrum : Disabled

[ericeod]

Try the below settings for 425 FSB x 8multi = 3.4GHz:

Extreme Tweaker
Ai Overclock Tuner : Manual
CPU Ratio Control : Manual
- Ratio CMOS Setting : 8
FSB Frequency : 425
FSB Strap to North Bridge : 400
PCI-E Frequency: 100
DRAM Frequency: 850
DRAM Command Rate : 2t
DRAM Timing Control: Manual
CAS# Latency : 4
RAS# to CAS# Delay : 4
RAS# Precharge : 4
RAS# ActivateTime : 14
RAS# to RAS# Delay : AUTO
Row Refresh Cycle Time : AUTO
Write Recovery Time : AUTO
Read to Precharge Time : AUTO

Read to Write Delay (S/D) : AUTO
Write to Read Delay (S) : AUTO
Write to Read Delay (D) : AUTO
Read to Read Delay (S) : AUTO
Read to Read Delay (D) : AUTO
Write to Write Delay (S) : AUTO
Write to Write Delay (D) : AUTO
DRAM Static Read Control: AUTO
Ai Clock Twister : Strong
Transaction Booster : Enabled
Boost Level :0
CPU Voltage : 1.55(highest I've tried)
CPU PLL Voltage : 1.58
North Bridge Voltage : 1.35
DRAM Voltage : 2.2v
FSB Termination Voltage : 1.38
South Bridge Voltage : AUTO
Loadline Calibration : Enabled
CPU GTL Reference : .63x
North Bridge GTL Reference : .67x
SB 1.5V Voltage : AUTO

CPU Spread Spectrum : Disabled
PCIE Spread Spectrum : Disabled

[JustMe2]

No-go, locks up about 20 minutes in Prime95.

[ericeod]

Originally Posted by JustMe2

No-go, locks up about 20 minutes in Prime95.

Here is a really good thread that might help you get the quad stable:
Xtreme Systems

For best stability, leave strap and RAM frequency to Auto, Disable both speed spectrum settings, Disable RAM Booster and relax to 0 (1~3 as needed for stability, when stable again), Set Ai Clock Twister to Auto or light (for now, avoid "strong", as it will add stress to memory system and become unstable, destracting OC test), Enable Static Read Control. Getting higher FSB out of a quad is gonna need some more PLL and FSB Termination V. Maybe up PLL to 1.712v and FSB Termination V to 1.504v is a good refference point.

Each core is slightly different, and as such while a voltage may allow one core to work perfectly, the other core may be too high or too low. You need to find the sweetspot using a combination of vCore, vPLL, vNB and vFSBT...

A stable OC of a Q6600 G0:

[JoBlo69]

i have my quad running at 4.0Ghz stable in my maximus formula. its pretty much the same thing as the P5E.

I can post my bios config if anyone is interested...

[hermit]

what's FSB Strap to North Bridge? at what do i set it up if my FSB is 370?

thanks

[cerealk1ll3r]

FSB Strap determines what FSBRAM dividers are available, I believe. If your FSB is set to 370, you want to set the strap so your ratio isn't 1:1, unless you like running underclocked RAM.

[JoBlo69]

i have my quad running at 4.0Ghz stable in my maximus formula. its pretty much the same thing as the P5E.

I can post my bios config if anyone is interested...

[hermit]

i thought it was sort of important to run FSB:RAM to 1:1. so right now, yes my RAM is a bit underclocked (740mhz).

so you're saying i should set the strap to 400?

[ericeod]

Originally Posted by JoBlo69

i have my quad running at 4.0Ghz stable in my maximus formula. its pretty much the same thing as the P5E.

I can post my bios config if anyone is interested...

Yes, please post your settings. The votages (all of them) are very important since the GTL voltage can make or break a quad core OC.