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i7 920 First Time OCed to 3.3ghz, check up

post #1 of 16
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Hello all, I am completely new to Overclocking and this is the first time I have done it. Just wanted to post some results and also some questions for you pros

Specs:

i7 920 3.3ghz
Rampage II gene
Mushkin 6gb RAM 1600mhz
700W PSU OCZ GameXstream

Core speed is at 3370 mhz,
multiplier is x21
bus speed 160 mhz
voltage 1.088v
DRAM bus voltage 1.64 (I read that people go 1.66, but I get a warning)

I ran prime95 for an hour+, under 100% load my temps were 65 degrees highest. I am using a Mugen Scythe 2 Rev.B cooler.

I was wondering if these temps were high, I searched around but ended up getting mixed answers. More importantly, was wondering if I can push 3.8ghz with my current cooling. Also, can I push DRAM voltage to 1.66 without issues?

Thank you all.
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post #2 of 16
WARNING!
Never push above 1.65V as it may causes problems with your CPU because of IMC(Integrated memory controller).
-----------------------------------------------------------------------------------------------
65 degrees looks fine and I guaranteed you have better headroom for overclocking to 3.8gHz.
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post #3 of 16
you shouldnt need to up the volts that high. Alot of people say they hit 3.8 with stock volts. Im at 3.3 with stock volts.
post #4 of 16
Quote:
Originally Posted by corpse fan View Post
you shouldnt need to up the volts that high. Alot of people say they hit 3.8 with stock volts. Im at 3.3 with stock volts.
Since when is 1.088 vcore high?

Assuming all of the necessary stability tests have been done, everything looks fine. One hour is not adequate though. Minimum 8 hours prime and 20 runs of Linx I would say.

I have a higher standard, though, as you can see in my sig. If it can't pass that, I don't call it stable.
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post #5 of 16
His question of 1.66 was about RAM Voltage, not Vcore...

OP, you're fine to push your chip a lot more. Just try to keep your temps somewhere around 80-85 while testing with Prime or IntelBurnTest.
    
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post #6 of 16
Quote:
Originally Posted by marcz123 View Post
WARNING!
Never push above 1.65V as it may causes problems with your CPU because of IMC(Integrated memory controller).
His question of 1.66 was about RAM Voltage, not Vcore...

OP, you're fine to push your chip a lot more. Just try to keep your temps somewhere around 80-85 while testing with Prime or IntelBurnTest.
    
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post #7 of 16
Quote:
Originally Posted by downloads_plz View Post
His question of 1.66 was about RAM Voltage, not Vcore...
Well saying "Alot of people say they hit 3.8 with stock volts. Im at 3.3 with stock volts." would seem to pertain to vcore to me, as that low of an OC wouldn't be effected by a .01v difference in the dram voltage. Perhaps I'm mistaken.

It's fine either way. 1.66v will not hurt anything, but that slight increase isn't needed whatsoever.

Some boards don't allow you to enter 1.65v for some strange reason. If I had to choose 1.64 or 1.66, I would go 1.66 for peace of mind.
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post #8 of 16
The number being missed here is VTT / QPI voltage. The issue with RAM voltage is well documented to be that it shouldn't be more than .5 volts higher than QPI voltage.

Pushing DRAM Bus voltage above 1.65 is a non-issue as long as you keep it within .5v of QPI/VTT. Most people doing OC start around 1.3v for QPI, which by this standard would make the ceiling for DRAM Bus voltage 1.8... Yes, the numbers turn red on your BIOS, yes Intel has it's little warning... no it doesn't have ill effect. With that being said, I'm not telling you to crank it up to 1.8 for no reason- just saying that you could (provided it was within .5v QPI VTT).

Also... Though this is a relatively conservative OC it still looks pretty good for a start. Not sure if you've locked in many of the variables- like your QPI link data rate, uncore frequency and so forth. This can help provide some additional stability.

Temps look good, but +1 for needing to work it a little more. With that being said, at this early juncture a quick test run will help at least give you the safety you need to continue to move up the ladder- once you get closer to the settings you want to keep I'd recommend turning up the throttle on prime and linx as mentioned above. IBT is another GREAT program!
Edited by Eno75 - 1/20/11 at 6:27am
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post #9 of 16
Quote:
Originally Posted by Eno75 View Post
The number being missed here is VTT / QPI voltage.
I'm not quite sure how that number is being missed. He has plenty of breathing room as far as that rule goes.

Pretty much everyone runs 1.3-1.4 VTT (sometimes higher with extreme overclocks), so he would have to push to 1.8v to even approach that. Odds are he's at 1.35, since that's pretty standard, which would be 1.85v.
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post #10 of 16
Thanks for the tip.

My point was that someone earlier was saying not to push past 1.65... when in fact the stipulation was the .5 volts above vtt...

Whatever he is running as VTT would set the limit... and as I mentioned that number isn't present for us to determine his max.
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