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My Gtx 480 sucks at overclocking

post #1 of 11
Thread Starter 
At the max core voltage in msi afterburner (1.138v), I can't even get 850 core stable for 30 seconds. Is that unusual? My stock voltage is 1.1v.
    
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post #2 of 11
You need a lot more voltage then that! Don't be to afraid GPUs are extremely tough. try 1.16 maybe more.

EDIT: Sorry just saw that was max of AB.

Quote:
Originally Posted by rickoles View Post
Go into the afterburner program folder and open up the .cfg file in note pad. There is a setting called 'enableunofficialoverlocking' (or very similar). Set it from 0 to 1 and this should allow you to OC further.
Try that.
Edited by fastsite - 2/10/11 at 7:35pm
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post #3 of 11
Thread Starter 
Whats the max safe voltage?
    
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post #4 of 11
Unfortunately you got a card w/a very high Stock VID ... 1.1V is the highest I've ever heard of one being (I had one like that as well ... but I returned it) ... so it's not terribly surprising that it's not an especially good OC'er I'm afraid. Still, even the best one's on air tap out at like 890, so you're talking about a couple % fps difference at MOST ... nothing you'd ever see w/the naked eye.
    
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post #5 of 11
1.1v on air
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post #6 of 11
Some things to note:

1. You have a really high VID as somebody has noted, while VID doesn't have a direct correlation to your ability to overclock, the fact that yours is that high does not bode well for any overclocking.

2. A lot of the time these cards are limited by temperatures as much as they are by voltage, I have had overclocks that are stable up to a certain temperature (normally around 96) but not beyond. Don't know if this is applicable.

3. With 2. in mind the maximum "safe" voltage depends highly on the temperatures you are getting under load.
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post #7 of 11
It happens man. Could try increasing your PCIE voltage a little, also your IOH voltage, they both can affect your GPU OC.
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post #8 of 11
welcome the world of OCing...

every card is different...

My 1st 480 in my SLI Pair will OC to 900/1800/2300 @1.14v Core with the AXP cooler..

While my second one can only reach 820/1640/2100 @ 1.2v Core with the AXP cooler..

But the second one also runs a 800/1600/2100 @1.1v and so does my first card..

so that is where i run them...

every card is different...
post #9 of 11
The GTX 480 w/ 1.063 stock VID wouldn't hit 850 on stock voltage, and upping it at all made the otherwise-perfect temperatures hit 100C almost immediately in OCCT, so I didn't bother. I ran it at 800/1850 core/mem; if I remember correctly, BC2 maxed w/ Vsync kept a stable 60fps with like 60% average GPU usage. So... you're not missing much from that 50MHz.
post #10 of 11
Thread Starter 
Temps aren't a problem for me, I got an AXP cooler. It keeps my core temp at 70c load. Also, what program do you use to raise the vid higher than 1.138v?
    
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