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GTX 480 BIOS flashing questions

post #1 of 16
Thread Starter 
Hi guys, first post here...

I've got an EVGA GTX480sc thats having problems. Its wasn't stable at the factory overclock, so I flashed it to a stock 480 BIOS. Even that wasn't stable so I just started underclocking it until it stopped giving me problems...

The clocks where its finally stable are 600 core, 1200 shaders, and 1690 memory. I would like to use NiBiTor to edit a stock BIOS to these speeds but am not entirely sure how to go about doing that.

I've looked through the clock domain editor and picked out the numbers I recognize as memory and shader clocks, but I don't see the stock 700Mhz core clock anywhere?



If someone could shed some light on the subject I would be grateful. I've also heard about flashing a 480 with a 470 twin frozr BIOS... anyone heard of this? Mixing card types sounds iffy to me.

Thanks!
post #2 of 16
Thread Starter 
Hate to double post but I think I'm on the right track...

I've set the shaders to 1200 and calculated the bumped shader clock at 1261... Memory set to 1690. I'm assuming the core clock is just calculated from the shader clock?

I'm not going to rush into it, I'm fine with waiting on feedback before I proceed Here's what I have so far
post #3 of 16
Honestly, if my 480 OC wasn't stable even at stock clocks, I'd RMA it....
     
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post #4 of 16
Thread Starter 
Second hand card from eBay... cant RMA
post #5 of 16
If it's not going at advertised speeds, RMA it. Don't settle for less, you paid way too much for it.

Had the same problem with my card - did it twice and I finally got one that worked at advertised speeds. The one of the fans on it is broken now, but that's a different story.


EDIT:
Just read how it's second hand...gl with your situation.
 
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post #6 of 16
Quote:
Originally Posted by Zags View Post
Second hand card from eBay... cant RMA
Then re-sell it on eBay for monay and lulz and get a new one
     
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post #7 of 16
Thread Starter 
Quote:
Originally Posted by SHNS0 View Post
Then re-sell it on eBay for monay and lulz and get a new one
Lol, the little amount that I'd get back by selling a bad card isn't worth the time. It was super cheap to begin with, 1/2 expected it to have some kind of problem.

Feels like were getting off topic though... no one has any thoughts on the clock domains?
post #8 of 16
What kind of temps are you getting? What kind of psu do you have?
post #9 of 16
Core and shader are linked, so 1401/2 gives you the core speed.

You want to set 1200.

Why not try a voltage bump to see if it stabilizes?
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post #10 of 16
Quote:
Originally Posted by grunion View Post
Core and shader are linked, so 1401/2 gives you the core speed.

You want to set 1200.

Why not try a voltage bump to see if it stabilizes?
Yes good point pump a few more volts in!
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