Help!

[zefyx1]

My stats as follows:

Q6600 G0
IP35 Pro
4GB Patriot 800MHz DDR2

Trying to get this Q6600 prime95 stable at 3.6GHz, shortly after doing a prime test for all 4 cores I get a reboot.

My bios settings are as follows:

400x9
1:1.00 (DDR2-800)
PCI-E: 100MHz

CPU Core: 1.5050v
DDR2: 2.200 (Recommended voltage)
CPU VTT: 1.27
MCH 1.25v: 1.41
ICH 1.05v: 1.15v
ICHIO 1.5v: 1.70v
DDR2 Reference: 0%
CPU GTLREF 0&2: 67%
CPU GTLREF 1&3: 67%

Any ideas? My temps are fine, my vDroop is pretty bad, but as it stands with vDroop I'm still below 1.50v under load. Thanks for the help!

 

[Rubycon]

You may just not be able to run at that speed. Try 8x400 and see if you can prime overnight. At 3.2 you should be able to run at 1.35V.

 

[zefyx1]

I've already gotten 3.2GHz stable, that's why I'm shooting for 3.6GHz!

 

[palladium]

I agree with Rubycon, if you can't get 3.6 stable with 1.5V you probably should back off ( unless you have water cooling). You may want to try and squeeze an additional 100-200MHz without further increasing the Vcore, though.

 

[Rubycon]

Originally posted by: zefyx
I've already gotten 3.2GHz stable, that's why I'm shooting for 3.6GHz!

Try running at 378x9 with 1.4 volts and priming over night.

What voltage are you stable at 3.2?

A Q6600 at 3.2 is no slouch either.

Not all Q6600's can do 3.6. It may be the holy grail for this CPU in fact. Probably less than 15% of them will do this stable loaded with decent air cooling.

You can also increase your VTT higher but stay below 1.45.

 

[chizow]

It could be your board, I'd say the 1.5V BIOS setting would be good indication of that. Newer boards with Load Line Calibration help a lot in delivering more stable and accurate voltages. I've also read P35 isn't nearly as stable as P45/X48 with Quad overclocking at high FSB speeds (400MHz+) due to FSB termination voltages. These two improvements going from an Nvidia 650i board to an Asus P45 seemed to have the greatest impact on my Q6600's overclocking stability. I couldn't get 3.1GHz stable on the 650i, but was able to hit 3.6GHz with the P45 with the exact same chip.

 

[Ratman6161]

Originally posted by: Rubycon

Originally posted by: zefyx
I've already gotten 3.2GHz stable, that's why I'm shooting for 3.6GHz!

Try running at 378x9 with 1.4 volts and priming over night.

What voltage are you stable at 3.2?

A Q6600 at 3.2 is no slouch either.

Not all Q6600's can do 3.6. It may be the holy grail for this CPU in fact. Probably less than 15% of them will do this stable loaded with decent air cooling.

You can also increase your VTT higher but stay below 1.45.

378x9 is a good suggestion. My q6600/IP35E does not like 400Mhz FSB. For example it is 100% stable at my usual 356x9 but not at 400x8 even though both yield about the same 3.2 GHz. 378x9 works for me but I have to crank up the voltage whereas with 356x9 I can leave it at default. I also don't really notice the extra couple of hundred Mhz for my usage so it didn't make any sense.

 

[lavaheadache]

this thread makes my q6600 seem godlike. 3.6ghz is a breeze with only 1.32volts

 

[Smartazz]

Originally posted by: lavaheadache
this thread makes my q6600 seem godlike. 3.6ghz is a breeze with only 1.32volts

That's pretty sick, what was the original VID of the chip?

 

[spinejam]

those abit ip35's have a significant vdrop and vdroop. an earlier q6600 i had needed a vcore of 1.55 (bios) to run at 3.5ghz prime stable. that cpu would register a vcore of 1.44 @ load (cpuz). :Q

try upping the vcore a bit!

 

[VirtualLarry]

Originally posted by: lavaheadache
this thread makes my q6600 seem godlike. 3.6ghz is a breeze with only 1.32volts

Mine too. DFI X48 LP LT T2R, with LLC enabled.

Temps are still an issue, with a Tuniq. Not great, but the chip will survive. (80-90C linpack)