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EVGA 780i Overclocking Guide - Page 141

post #1401 of 1607
Quote:
Originally Posted by BigJeebz View Post
So I can't seem to get mine up to 3.6 and I'm not sure why??? I tried 400x9, 333x11, and 300x12, all @ 1.48 vcore and the last time It froze and wouldn't post for several minutes? I updated my bios to P08 and tried again and still no dice? Any suggestions.
Quote:
Originally Posted by teK0wnzU View Post
Looking to make my system stable in Vista x64 Ultimate.
Right now my GTLVREF Lane's are:

GTLVREF Lane 0: +00MV (auto)
GTLVREF Lane 1: +65MV (auto)
GTLVREF Lane 2: +00MV (auto)
GTLVREF Lane 3: +00MV (auto)

Why lane 1 is auto +65 is beyond me, but it is.
should I try something different?
Had this board for about a year now, and the "quad bug" holds true - this board just blows for quads. With Vista 64 things only got worse for me. Really, really, sucks. What's really weird is that my friend just got the 780i FTW and he's running Vista Ult. 64 with a Q6600 @ 3.6 (400 *9) with zero problems.
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post #1402 of 1607
Quote:
Originally Posted by GoneTomorrow View Post
Had this board for about a year now, and the "quad bug" holds true - this board just blows for quads. With Vista 64 things only got worse for me. Really, really, sucks. What's really weird is that my friend just got the 780i FTW and he's running Vista Ult. 64 with a Q6600 @ 3.6 (400 *9) with zero problems.
I have herd of people setting the GTLVREF Lane's to +85mv and it made it more stable. Have no clue if it is true, but I don't know what all can go wrong if I do up my GTLVREF Lane's. I'm not looking to fry my proc or mobo. Does anyone know?
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post #1403 of 1607
GTLVREF does not increase actual voltage, so no you won't break anything with it. It has to do with what current values the motherboard flags as a 0 or 1. Despite what you think, a 0 does not mean no current, its just very low.

And yes, the correct GTLVREF setting can greatly increase stability, but that setting isn't always 85. It's also almost never what it gets set to under "Auto"
post #1404 of 1607
Quote:
Originally Posted by noldevin View Post
GTLVREF does not increase actual voltage, so no you won't break anything with it. It has to do with what current values the motherboard flags as a 0 or 1. Despite what you think, a 0 does not mean no current, its just very low.

And yes, the correct GTLVREF setting can greatly increase stability, but that setting isn't always 85. It's also almost never what it gets set to under "Auto"
Any way to test what is the best setting for each lane?
Should they all be the same. Not sure? I guess I should test it out.
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post #1405 of 1607
This is the guide I use for GTLVREF http://www.evga.com/forums/tm.asp?m=476249
post #1406 of 1607
Quote:
Originally Posted by noldevin View Post
This is the guide I use for GTLVREF http://www.evga.com/forums/tm.asp?m=476249
rep+ for the info, but wow, kind of pain in the ass to tweak the lanes it seems. What are your set at, just out of curiosity?
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post #1407 of 1607
They were at auto, now I have them at +65mv.
I did see a 1.1% improvement on passmark so I guess I did something.
I also ran OCCT for an hour with no errors.
Good news is when I woke up this morning my computer had not reset itself.
So far so good. back to running 3.0Ghz @ 1.175v.
I also Linked my memory at 3:2 ratio so FSB is 1600 and ram is at 1066.
Before I just had it at Unlinked 1600 // 1066.
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post #1408 of 1607
I have backed off my OC for now because I noticed some weird things happening, and they stopped when I tried lowering my OC. So unfortunately I don't have any values for you. I may try re-overclocking today so I'll post up if I get anything good. Just remember it might vary from chip to chip, even on the same model.
post #1409 of 1607
I took a Q6600 G0 chip from a Dell and have it installed on a 780i board. Bios is P07. I've tried everything in this thread to overclock this chip some where around 3.0 to 3.2 and can't get it to work. It may post, but then blue screens when starting Vista. I set everything up from the first post in this thread and it won't even post. Could this be just a bad Q6600 because it was in a Dell? Can someone give me some ideas what to tweak according to the first post to run at 3.2? Thanks.

Q6600 on 780i
PC2-8500 1066 OCZ 2x2 RAM
8800 GTS 640 Video card
750 OCZ Extreme PSU
post #1410 of 1607
I had a point at 2.8 that would just not run properly. The famous FSB hole. I've been at 3.2 for a couple months now with no problemo. That's with a 1.3125 VID (not a good one).

1. Voltage on auto increases it automatically and works quite well.
2. Unlink your RAM frequency and fix it at it's nominal speed. You can link or tweak it later when your processor is stable.
3. Check the voltage on your RAM is actually what it requires. Probably 2.1V looking at the speed - check it.
4. Cooling plays a part but won't generally stop it booting into Windows.

EDIT- RAM timings and everything else at auto will work. C1E disable only required if you are going for it and at 3.2 won't cause a problem. If you have altered EVERYTHING as per the first post then you would be best to set it all back to bios defaults and just do the unlinked, auto CPU voltage and check RAM volts as above. That should get it running (faster).

P08 BIOS is easy to install and most likely worth doing as well.
Edited by dogshome - 2/11/09 at 11:15am
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