Taking another shot OCing my Q6600.

TheVrolok

Lifer
Dec 11, 2000
24,254
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I read through the Q6600 sticky, and it was fantastic. That's where I learned essentially everything I know about OC'ing (which is admittedly little). I had OC'ing my Q6600 to 3.0 almost a year ago, but after a few weeks the board just quit on me (Asus P5N32-E SLI Plus) and I got scared off OC'ing. Honestly, I think it was just a crappy bored. So I ended up replacing it with my current board, the EVGA 750i FTW. I've run this set up for a year-ish and now want to OC again.

Ok, so I've pumped it up to 9x333 because I want a pretty basic but fair OC. For this first shot I left all my voltages on auto. My memory timings I manually imputed the default factory timings. I ran Prime95 for 6-7 hours with 0 errors, and at max the cores his 67C. All well and good, but a bit warm, and really, 6 hours is a bit short.

So this is basically my plan. Start dropping the vcore until I can find the lowest vcore that I'll get a good 24 hours of no errors on. This way I can cut down on heat and see what kind of room I have to push things. Once I find a nice ground level vcore, I'll pump up the OC a bit and will most likely raise the vcore along with it for stability. I left my VTT on auto for now, but I was wondering, should I have dropped it as well? If I went by the guide I'd drop 'em both low, and work my way up to a stable OC, while I'm sorta doing it backwards. Is the way I'm doing things viable as well or should I just start over? Like I said, the sticky is fantastic, but I just need to talk it out to properly digest it. :)

I'm currently running the 9x333 (3.0) at a vcore of 1.25 and I'm an hour into primes with no error so far. I'm kinda surprised it hasn't failed already at this vcore, maybe since I left the VTT at auto instead of dropping it as well it's compensating? The nice thing is, with this vcore my hottest core is 52C under load. Going to let this run and see how long it goes.

For reference:
Q6600 SLACR G0 stepping. VID = 1.2500v. The rest of the system is in my sig.
 

Shmee

Memory & Storage, Graphics Cards Mod Elite Member
Super Moderator
Sep 13, 2008
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Hmm, you got a Q6600 very similar to mine. Same VID. We also have similar boards. Oddly, I have trouble with stability over 3.2 ghz...Mb I need to adjust my tuniq tower/lap/play around with volts some more. Temps seem decent, what were you monitoring them with? Might consider a bigger, better cooler. or turn up fan speed or something, not sure. or re-seat your cooler.
 

Gillbot

Lifer
Jan 11, 2001
28,830
17
81
Originally posted by: TheVrolok
....

For this first shot I left all my voltages on auto.

....

Start dropping the vcore until I can find the lowest vcore that I'll get a good 24 hours of no errors on.

.....

You should manually enter ALL voltages. Many boards will bump up the voltages if you leave them on auto adding needless stress.
 

Shmee

Memory & Storage, Graphics Cards Mod Elite Member
Super Moderator
Sep 13, 2008
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Originally posted by: Gillbot
Originally posted by: TheVrolok
....

For this first shot I left all my voltages on auto.

....

Start dropping the vcore until I can find the lowest vcore that I'll get a good 24 hours of no errors on.

.....

You should manually enter ALL voltages. Many boards will bump up the voltages if you leave them on auto adding needless stress.

what about the GTLVREF? I have my voltages on manual, all except for that. just not sure what to do there. There is a long thread on EVGA forums about it, but it is very confusing, and long... :C
 

TheVrolok

Lifer
Dec 11, 2000
24,254
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Originally posted by: Gillbot
Originally posted by: TheVrolok
....

For this first shot I left all my voltages on auto.

....

Start dropping the vcore until I can find the lowest vcore that I'll get a good 24 hours of no errors on.

.....

You should manually enter ALL voltages. Many boards will bump up the voltages if you leave them on auto adding needless stress.

Since posting, I've done that. I sorta figured the board would automatically bump up some of the other voltages, I didn't really want that happening. Although, my VTT at auto was 1.4v and my system errored nearly immediately with anything lower than 1.35v. So I'm actually running Vcore 1.25, VTT 1.35, Mem 1.9, SB 1.3, NB 1.2 and seeing how this goes for now. If it's stable, I might actually try to drop the Vcore a bit more before I up the clock speed.
 

cmdrdredd

Lifer
Dec 12, 2001
27,052
357
126
Originally posted by: Shmee
Hmm, you got a Q6600 very similar to mine. Same VID. We also have similar boards. Oddly, I have trouble with stability over 3.2 ghz...Mb I need to adjust my tuniq tower/lap/play around with volts some more. Temps seem decent, what were you monitoring them with? Might consider a bigger, better cooler. or turn up fan speed or something, not sure. or re-seat your cooler.

It's the Nvidia chipset. Intel chipset based boards (P35/45 X38/48) will get it higher more easily (not necessarily guaranteed anything however), but most Nvidia chipsets top out at 3.2 on the 65nm quads.
 

Shmee

Memory & Storage, Graphics Cards Mod Elite Member
Super Moderator
Sep 13, 2008
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well, I know some people have gotten to 3.6 or higher on evga forums, but they probably know a lot more about voltage tweaking and spent a lot more work :D

@ 3.3 right now, still testing and tweaking.