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***The Official Core i7 Overclocking Thread***



Temps are ok ish but will need some watercooling really. Its fine in games and such but with Prime 95 it goes to about 85 eventually

Its 100% stable at 3.8Ghz with 1.27v core, 1.2v QPI with temps not exceeding about 72C

Batch # 3837b194
 
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Have my i7 920 up and running @ 3600mhz.
Just wondering does it matter that i only have 2 sticks of ram 2gigs each ?

Will my computer be held back due to not having 3 sticks of ram ?

Thanks
Mk
 
920@ 3.6 200x18.0, 1.265 core volts. Nice and stable, could get way more but I dont really need it....as it is it runs 33c on desktop with a few applications open, and 65c after 5 hours of prime running. All on air:cool:

Before I tried anything I thought I would see how lucky I was and it booted in to windows at 4Ghz no problems whats so ever. Infact I think I have a pretty good chip, the only thing was it was pushing near 80c at 100% which I am not happy with, which is why I am down to 3.6.
 
Hi,

What are considered safe voltages to run 24/7?

My current are,

Vcore 1.36
QPI 1.3
Vdimm 1.64 (Corsair Dominator 1.65v mem)
Asus P6T, 920 and Noctua hsf.

I can run at 4Gig with either 190blck + turbo or 210 with a 19 multi, temps under load are 64-67.

Cheers, Simon.
 
Helios1234 said:
Nice! How are you keeping it that cool. With my Noctua, temps go up to 80 degrees on load at 3.8ghz and a lower vcore.
Click to expand...


Pure blind luck I think :D

More realistically it may be a good chip or the bios is lying and either not supplying the selected voltage or it's not all arriving at the CPU through 'transit loss' i'm sure there is a correct term for it.

This same chip in an Asus P6T WS Pro using a 16 phase circuit would run Cinebench at 4.0gig on the stock cooler or Super pi at 4.2gig 1.336/1.352Vcore. I am thinking the 8 phase circuits used on the vanilla P6T are making the difference.


Cheers, Simon.
 
SimonB said:
Pure blind luck I think :D

More realistically it may be a good chip or the bios is lying and either not supplying the selected voltage or it's not all arriving at the CPU through 'transit loss' i'm sure there is a correct term for it.

This same chip in an Asus P6T WS Pro using a 16 phase circuit would run Cinebench at 4.0gig on the stock cooler or Super pi at 4.2gig 1.336/1.352Vcore. I am thinking the 8 phase circuits used on the vanilla P6T are making the difference.


Cheers, Simon.
Click to expand...

What program are you testing for stability though ?

Try this: http://www.fileden.com/files/2008/12/29/2243633/LinX.7z

Use all memory + run in 64 bit mode and a 64bit OS if possible. That should get you around 80- 90c.
 
I'm tempted to follow all that guide on page 1 to try for 4Ghz but some of the voltages seem quite high.

Bluesouljah would you be able to post up your settings? What kind of vdrop are you getting on the UD5? I heard the load line calibration doesn't work and mines got some drop on it.

Maybe I just have a bad chip. :(
 
hmm
getting problems with my overclock
i7 920, foxconn bloodrage, 3x2gb corsair 1600, watercooled.

at the start, I couldnt push blck past 160. started upping uncore and playing with blck, got to around 190 with uncore around 1.4v, managed to load to windows, and I could run to 3.8ghz prime stable no problem.
still thought 190 was low, could possibly have pushed it further, but by then after a few succesful posts and prime testing, id restart from a stable overclock and system would fail to post.
now, the moment i vary the blck, randomly fails to post. no amount of tweeking uncore/VTT or the multipliers works. even moving blck DOWN to 130 from stock 133 and the board fails to post.
ive tried disabling hyperthreading, fixing cpu multi to 12, varying qpi/mem/uncore multi's to their lowest settings. none of that has helped.
on the off chance that i get a half decent overclock, it'll be completely stable in windows, then i restart and it'll fail to post once again

gonna find out my debug codes and try to work out whats going on.

this crashing happened on the p03 bios version that the board shipped with and also the G13 bios I have installed now.
------------

SORTED: found spread spectrum enabled and hiding away in a tiny bios corner. disabled and primeing now!
 
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mr_x_plosion said:
I'm tempted to follow all that guide on page 1 to try for 4Ghz but some of the voltages seem quite high.

Bluesouljah would you be able to post up your settings? What kind of vdrop are you getting on the UD5? I heard the load line calibration doesn't work and mines got some drop on it.

Maybe I just have a bad chip. :(
Click to expand...

I have the UD5 also.
Im getting lots of Vdrop also when i max out all the cores & HT.
What i set in bios is not the same as i see with CPU-Z. Have it set in bios now at 1.35 "i think" and its showing as 1.328 when i get into windows. Then when i use prime to max the cores it drops to 1.28. Kind of crazy.

Just have it at 3.8Ghz now but i7 are so easy to overclock. Have benched it at 4.1Ghz but seems to bomb out when i try to bench at 4.2Ghz. Prob needs more volts but im only using a True cooler.And wont go more then 1.45 in bois but in windows drops to about 1.38.


Edit: Ok i went into bios and i have it set to 1.375 & not 1.35 as i posted above. Also went into PC health within bios and that shows my Vcore at 1.348. With all these figures im not sure which one is telling the truth.
Bios setting @ 1.375
PC health showing @ 1.348
Windows showing @ 1.328
When maxing system @ 1.28

Maybe this is normal, maybe its my powersupply. I don't know
 
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muppetkiller said:
I have the UD5 also.
Im getting lots of Vdrop also when i max out all the cores & HT.
What i set in bios is not the same as i see with CPU-Z. Have it set in bios now at 1.35 "i think" and its showing as 1.328 when i get into windows. Then when i use prime to max the cores it drops to 1.28. Kind of crazy.
Click to expand...

The vdrop is one thing, easily compensated for with a higher value. The vdroop is another, shouldn't really drop that much with the load line enabled (LLC). Maybe around 200mV on my Extreme. There is a pencil mod for the vdroop iirc.

 
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