Help getting stable 4Ghz Q9650 on a P5Q Deluxe

[Michaeljcox24]

Ok....

I have this board, and just got this chip (E0) to replace my Q6600. VID for the chip is 1.28V. Cooler is H50 push pull

I have the FSB set at 447, ram speed at 893, 2.1V (ram is 800MHZ HyperX DDR2)

Vcore is 1.35V. On a blend test, prime 95 BSOD crashes out after an hour or so.

I looked at the specs for the chip, and on the intel site max VID is 1.3625, which means I am very close to what intel call the safe maximum voltage for the chip. Prime hits around 63 before crashing.

Reading various forums, there's several other settings, namely PLL, FSB termination, North Bridge, that people have adjusted to get theirs stable.

Do I just increase VCore till I get it stable on small FFT's, if so, can I go higher than 1.3625, or do I change these other settings and if so, by how much, because I can't find a single guide anywhere that explains them.

 

[PCTwin]

I would increase the vcore, but it all depends on your cooler.

if your cooler can handle it , try it.

the other thing to check is your memory timings.

I've had overclocks run for hours and then crash because the timings were wrong.

 

[Michaeljcox24]

Cooler is H50. Wasn't sure if I could go above 1.3625 even if temps were ok.

Memory timings are 5-5-5-15.

 

[tinytomlogan]

Youll probably find the ram will start to limit you but youll deffo need to up the volts. But the H50 will probably start letting you down.

 

[Michaeljcox24]

with my older Q6600 I could run the memory at 1071, so i didnt think it would be a prolem because thats a possible divider the bios gives me with a 4GHZ. I guess biggest problem will be temps. H50 has to stay though, it was bday present off the missis last year

 

[marsey99]

temps dont look too bad tbh but i dont think the h50 will take much more than 1.4vcore

google a bios template for your board and edit it so it has your settings in it and then we can see what options are available.

p45 should hit 450 fsb without any more voltage.

pll you wont need much more than stock tbh, i only need 1.65 to hit 4.6ghz

term should be set just under vcore.

with you being so close i would guess its a ref that needs tweaking (maybe term) tbh but you might need more vcore as i dont know your chip.

post a template then we can go from there.

 

[Michaeljcox24]

Thanks, will do this when I get home later.

 

[Michaeljcox24]

Ok here are settings. The majority are left on auto because I never had to touch them on my old cpu and hence don't know what they do.

AI Overclock tuner: Manual

CPU Ratio Setting: 9

FSB Strap to North Bridge: Auto

FSB Frequency: 446

PCI-E Frequency: 100

DRAM Frequency: 893

DRAM CLK Skew on Channel A1: Auto

DRAM CLK Skew on Channel A2: Auto

DRAM CLK Skew on Channel B1: Auto

DRAM CLK Skew on Channel B2: Auto

DRAM Timing Control:

CPU Voltage: 1.35

CPU GTL Voltage Reference (0/2): AUTO

CPU GTL Voltage Reference (1/3): AUTO

CPU PLL Voltage: Auto

FSB Termination Voltage: Auto

DRAM Voltage: 2.1

NB Voltage: Auto

NB GTL Reference: Auto

SBridge Voltage: Auto

PCIE SATA Voltage: Auto

Load Line Calibration: Enabled

CPU Spread Spectrum: Auto

PCIE Spread Spectrum: Auto

CPU Clock Skew : Auto

NB Clock Skew : Auto

Advance CPU Settings

C1E Suppport: Disabled

Max CPUID Value Limit: Disabled

Intel® Virtualization Tech: Disabled

Vanderpool Technology: Disabled

CPU TM Function: Disabled

Execute Disable Bit: Disabled

 

[marsey99]

lot of autos there mate :|

does ai suite tell you what any of them are set to so you know what your running atm? i dont like auto me and try to get all volts and setting as low as i can before starting, can cause some headaches to begin with but you get to know what crashes are caused by what.

i would turn off the spectrum spread first.

CPU PLL Voltage: Auto (should be 1.5v may need 1.6v)

FSB Termination Voltage: Auto (try 1.3/1.32v over 1.4v isnt advised for 24/7 use and normally just under vcore gets best stability)

NB Voltage: Auto (try 1.2v or 1.3v i cant see you needing this much but you might need 1.4v i wouldnt go any higher 24/7 tbh)

 

[Michaeljcox24]

ok cheers will try these then report back.

 

[Michaeljcox24]

Pll @ 1.56

FSB Termination @ 1.36

North Bridge @ 1.4

V Core 1.3625

Spread Spectrum off.

With these settings, I ran a 3 hour small FFT run last night with no crashes. Still a long way to go though. Do you think spread spectrum was possibly causing the crashes before, and the vcore need not be that high afterall?

UPDATE: Blend still crashes after an hour at these settings.

Perhaps I need to loosen timings? Currently at 5-5-5-15

 

[marsey99]

getting closer

as your volts are at the level they are i would try nb strap and skews, strap at its highest setting (400 if you can) and maybe 100 or so on the nb skew. you could try the nb ref volts but without know where you are its hard to say.

so far i have been using my p45 as refference but now really you need help for people with your board as they do seem to respond different, mine needs less voltage for eg and while i was a googling i found 2 threads on other sites just about your board. this is a good little guide to ocing and this is a pretty huge thread all about the board and issues overclocking/living with it.

 

[Michaeljcox24]

Many thanks for the tips and links.

I bought some 2nd hand 1066 mem yesterday. Tried loosening the timings to 7-7-7-21 on my old 800 stuff but the blend test still wasn't having it.

Can run small fft all day and 5 passes of intel burn test otherwise.

Will report back. I had forgotten how laborious and frustrating this whole process could be!

 

[Michaeljcox24]

Done it, just a case of mega high vcore.

1.3865

NB and VTT both around 1.25 though.

 

[marsey99]

see if 1.3v term lets you drop the vcore any, might not tbh but its worth a test too see imo.

mch volts is nice, i have seen others need more with 1066 ram.

 

[Michaeljcox24]

I have mate, I set vtt at 1.36 all the way up to 1.3865 on the core. Im prime stable on the next notch down but only for around 3 hours.

Quite surprised at this result, looking around at old forum posts most lads are at around 1.3 - 1.35, I guess a 1.28 vid doesn't help.