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post #11 of 16
Go to 1.4 vcore. 1.5 is rather high and will only serve to make heat and instability. If VTT is 1.2, set to 1.3. 1.2 would be nice but sometimes, at higher FSBs... they don't hang as well.

Not sure what your southbridge would be called on that board... but set in the 1.4-1.5 range (on the high side). Finally... make sure your ram is unlinked and set to default speed. Leave all timings in auto for now as well.
post #12 of 16
You need to go to a higher FSB. Shoot for 1600 to see if you don't have a long range where you have a FSB hole. That what what we're trying by jumping so far ahead. My 680i and 780i both had spots where it just wouldn't be stable through certain ranges of fsb.
post #13 of 16
http://forums.hexus.net/pc-hardware/124416-q6600-overclocking-680i-how-56k-killer.html

I have a Q660 G0 at 3.2ghz using evga 680i Sli mobo and Thermalright Ultra 120.

I did everything exactly as written in this guide except change to 1450 for 3.2ghz and volts to 1.4375

I never had any problems, just never pushed it past 3.2ghz
    
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post #14 of 16
the 6xx chipset from Nvidia had a hardware fault that wasn't supplying correct voltage/current to the CPU iirc. It was hell to try and get them stable at 3GHz. The best I managed was 2.8 if I remember correctly. Can't remember the settings at this time of night. I can try find out for you when I wake up tomorrow though.
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post #15 of 16
Thread Starter 
Quote:
Originally Posted by charleswrivers View Post

Go to 1.4 vcore. 1.5 is rather high and will only serve to make heat and instability. If VTT is 1.2, set to 1.3. 1.2 would be nice but sometimes, at higher FSBs... they don't hang as well.
Not sure what your southbridge would be called on that board... but set in the 1.4-1.5 range (on the high side). Finally... make sure your ram is unlinked and set to default speed. Leave all timings in auto for now as well.

I'm not sure my board as a VTT setting?
Quote:
Originally Posted by charleswrivers View Post

You need to go to a higher FSB. Shoot for 1600 to see if you don't have a long range where you have a FSB hole. That what what we're trying by jumping so far ahead. My 680i and 780i both had spots where it just wouldn't be stable through certain ranges of fsb.

I boosted all the way from 1400 to 1800 taking steps of 100. Didn't work.
Quote:
Originally Posted by rgr555 View Post

http://forums.hexus.net/pc-hardware/124416-q6600-overclocking-680i-how-56k-killer.html
I have a Q660 G0 at 3.2ghz using evga 680i Sli mobo and Thermalright Ultra 120.
I did everything exactly as written in this guide except change to 1450 for 3.2ghz and volts to 1.4375
I never had any problems, just never pushed it past 3.2ghz

Thanks I'll try that sometime and see what happens.
Quote:
Originally Posted by Swift Castiel View Post

the 6xx chipset from Nvidia had a hardware fault that wasn't supplying correct voltage/current to the CPU iirc. It was hell to try and get them stable at 3GHz. The best I managed was 2.8 if I remember correctly. Can't remember the settings at this time of night. I can try find out for you when I wake up tomorrow though.

If you could that would be good thanks!
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post #16 of 16
I swapped my 680i for the 780i years ago. Most mobo manufactures allowed this for free when it came out they weren't going to support 45 nm quads. The 680i I had wouldn't OC the Q6600 like the 780i. I could still get back 3.0 though myself. Never 3.6... let alone 3.8. Again, I could never get stable past ~3.3 on a x9 mulitplier. Had to drop to x8 and kick the fsb up instead.

Vtt at 1.2 may not give enough juice when you go over 400 (1600 fsb). On some boards apparently 1.2 is sill good for the 400-450 range. I'm running 475 (1900) so 1.3 was needed. I also needed more volts on the South Bridge. I'm not sitting in front of my computer now, so I can't remember what term that is. It can be one of a couple things based on the manufacturer.

As my 680i crippled OCing, your may just not want to push past a certain point as well. the E6600 went up to 3.6 w/o a hiccup. The Q6600 topped out around 3.2 ghz. A couple last things to look at. Verify you are definately not OCing your ram while you're OCing. Find out you SB term and give it more volts. Mine required a *lot* (1.5v I believe... right up to the red numbers) to hold 1900 fsb. As you're going higher, even if you're not that high, more may be required. It too low, I'd either not post, Windows wouldn't load or, if I made it into Windows, doing anything that put load on the memory would crash it by freeze or BSOD. Good luck.
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