Ok guys, I need some advice here.
I'm having a hell of a time getting my QX0650 to overclock beyond a certain speed.
At 3.6 GHz 9x400 with 1.26v it's perfect and runs Prime95 all day and all night.
But once I try to bump it up toe 4.0 it just won't do it. I bumped the vcore up to 1.44v and still no love. I think that's a pretty good bump for 400 MHz, no?
My PLL is at 1.5 and my FSBTerm is set at 1.4 in bios (shows at .1 lower in the bios voltage monitor)
Bios 1004 Temps are 64 64 59 60 load with ambient around 20-21. This is on water. Fuzion with an MCP655 and a PA120.2 with 4 Scythe 1200 RPM in push/pull on the rad.
Here are my settings for 4.0GHz. Does about an hour or two in Prime95
Extreme Tweaker
Ai Overclock Tuner : Manual
OC From CPU Level Up : AUTO
CPU Ratio Control : Manual
- Ratio CMOS Setting : 10
FSB Frequency : 400
FSB Strap to North Bridge : 333
PCI-E Frequency: 100
DRAM Frequency: DDR2-961
DRAM Command Rate : 2T
DRAM Timing Control: Manual
CAS# Latency : 5
RAS# to CAS# Delay : 5
RAS# Precharge : 5
RAS# ActivateTime : 12
RAS# to RAS# Delay : 3
Row Refresh Cycle Time : 55
Write Recovery Time : 5
Read to Precharge Time : 3
Read to Write Delay (S/D) : 8
Write to Read Delay (S) : 4
Write to Read Delay (D) : 5
Read to Read Delay (S) : 6
Read to Read Delay (D) : 6
Write to Write Delay (S) : 4
Write to Write Delay (D) : 6
DRAM Static Read Control: Enabled
Ai Clock Twister : Moderate
Transaction Booster : Disabled (1)
CPU Voltage : 1.4125 (1.4 in CPUZ)
CPU PLL Voltage : 1.5
North Bridge Voltage : 1.55
DRAM Voltage : 2.00
FSB Termination Voltage : 1.34
South Bridge Voltage : 1.1
Loadline Calibration : Enabled
CPU GTL Reference : 0.63
North Bridge GTL Reference : 0.67
DDR2 Channel A REF Voltage : DDR_REF
DDR2 Channel B REF Voltage : DDR_REF
DDR2 Controller REF Voltage : DDR_REF
SB 1.5V Voltage : 1.5
NB LED Selection : NB Volt
SB LED Selection : SB Volt
CPU LED Selection : CPU VOlt
Voltiminder LED :
CPU Spread Spectrum : Disabled
PCIE Spread Spectrum : Disabled
Advanced CPU Configuration
CPU Ratio Control : Manual
- Ratio CMOS Setting :
C1E Suppport : Disabled
CPU TM Function : Disabled
Vanderpool Technology : Disabled
Execute Disable Bit : Disabled
Max CPUID Value Limit : Disabled
USB Configuration
USB Functions: Enabled
Legacy USB Support : Disabled
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