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Old 12-13-06, 08:23 AM   #1
Lazaredz
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Default 680i voltages and OCing

I'm trying to get a little more out of my 6600. I now have time to do some fine tuning OCing but am a little confused by the voltages, and their importance/impact on performace and stability.

I currently am Orthos testing 3.6 at 9x400 with the following:

CPU core 1.55 (gives me actual of 1.50)
FSB 1.5
Mem 2.1
SPP 1.5
MCP 1.6
HT 1.5

I'll know later today if these are CPU stable or not, but if they are, what should I try to back off of first. I'd like to use the minimal voltage to maintain this OC (for better cooling). Also, its always nice to actually KNOW a little something about what one is doing instead of just following the instructions.

So what is everyone's voltages and why?

Thx
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Old 12-13-06, 11:18 PM   #2
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Default Re: 680i voltages and OCing

Yes the Evga 680i ,when you set the voltage to the CPU it shows a lower voltage to what you set it at ,but you can check to Bios monitor and it will show the correct voltage ,When I run my at 3.6gigs 1.4v and it shows 1.34v in the Bios monitor.
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Old 12-14-06, 03:33 AM   #3
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Default Re: 680i voltages and OCing

I'm actually doing the same as you:

here are my voltages:

VCORE: 1.54375v
CPU FSB: 1.5v
VDIMM: 2.2v
SPP: 1.50v
MCP: 1.6v
HT: 1.55v

Upping the MCP and the HT gave me much better/stable OC results then when I first started to try and push my e6600.

Those are my current voltages and as I type this Orthos is running the background. I'm trying to get 3.5ghz stable. So far Orthos has been running stable for 19mins...haha..but its better than 1 min like it use to be. I was getting reboots during orthos so I moved my voltages to what you see above.

So far so good.

Let me know if your stable on the voltages, I'm interested in seeing.

EDIT: Lazaredz: after reading your signature, our systems are almost identical! Now I'm even more interested in what you achieve at the those voltages. It would seem we are almost on the same page here.

EDIT: BLAST! this keeps happening. After about 30-36 mins of Orthos...my system will just reboot...no failure in Orthos...no freezing, no BSOD, just reboot.
has this happened to you at all? What should I do.....no matter how high my voltages...it just seems to take a dump around that time.

Last edited by OrangeBlast; 12-14-06 at 03:45 AM.
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Old 12-14-06, 07:16 AM   #4
Lazaredz
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Default Re: 680i voltages and OCing

Okay, I think I locked in 3.6. Had to play with the voltages a bit:

CPU 1.525 = 1.48 actual
FSB 1.5
Mem 2.1
SPP 1.55
MCP 1.5
HT 1.45

Bumping the SPP is what REALLY nailed it for me. I also was getting failures about 10-15 minutes into Orthos (that included reboots) until I bumped the SPP up just a bit more. Now I've got:









I've dried dropping both the CPU and SPP a notch down, but then I get failures again, so I think this is going to be it.

I'm going to try a P95/RTHDRIBL loop to see if that is stable too. If its good I'll probably just play for a few days and if no issues arise, move onto overclocking the 8800 again. I've got a rough start on that also, but need to zero it in more. Will probably end up bumping the voltage on it too once the "pros" give me an idea what to aim for.
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Old 12-14-06, 11:59 AM   #5
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Default Re: 680i voltages and OCing

Allright, good to go:



Bump the SPP to 1.55 and give it a shot Orange
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Old 12-14-06, 12:41 PM   #6
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Default Re: 680i voltages and OCing

I will try that. Setting SPP to 1.55.
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Old 12-14-06, 02:21 PM   #7
OrangeBlast
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Default Re: 680i voltages and OCing

Damn...still didn't do it for me.


Currently this is what I have right now:

CPU: 1.575v
CPU FSB: 1.5v
Memory: 2.2v
SPP: 1.55v
MCP: 1.55v
SPP<->MCP: 1.55v

I'm sitting at 3.6 right now...xp loads...I'm going to attempt Super-PI at 32 first then move to orthos.

be back.
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Old 12-14-06, 02:37 PM   #8
Lazaredz
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Default Re: 680i voltages and OCing

Just watch your temps. That little MCP is gonna get HOT!!!!
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Old 12-14-06, 03:25 PM   #9
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Default Re: 680i voltages and OCing

what exactly is the MCP? is it the northbridge?
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Old 12-14-06, 09:54 PM   #10
Lazaredz
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Default Re: 680i voltages and OCing

Actually, its the southbridge. The SPP is the northbridge.
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Old 12-14-06, 11:18 PM   #11
OrangeBlast
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Default Re: 680i voltages and OCing

the MCP cooling on the evga 680i blows ass.
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Old 12-15-06, 04:20 AM   #12
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Default Re: 680i voltages and OCing

If you not run SLI a fan on SB will help.
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