OCing a Video Card?

J

joeswm8

New Member
Is OCing a video card like OCing memory, or a CPU, with its own section in the bios? Is there any way the pixel piplines would be unlockable? Is there a multiplier like a CPU, or just the core/memory that get changed as a whole?
Like change the 500 core to 600 after slow increments, right? And change the memory from 775 to 900 after slow increments? Is this all that is needed to be done with adequate cooling and an extremely slight increase of the voltage? This is all done in the BIOS, correct?

How does this card look for a nice OC?
http://www.newegg.com/Product/Product.asp?Item=N82E16814150202
 
Nope, you dont do that in the BIOS. It's done with Windows-based apps, such as ATI Tool or NVTweak.

And no, you cant unlock that video card, because the pipelines are laser cut.

Basically the only things you change are the core clock and memory clock, which is done with one of those programs. And for the majority of video card (except the X1K series), you cant change the voltage without physically moding the card, which is very dangerous.

I would recommend using ATI Tool for both ATI and nVidia cards, I think it works the best.
 
Yes, take baby steps and also make sure it keeps cool when overclocking. I OCed my X850 a bit too much one night and it became incredibly unstable and crashed when playing games...I believe I OCed both the mem and core clocks from 499.95 to 585...
 
wow thats big, ill get a ton of fans. You can also lower the core/mem too, right?

And just a general OCing question, when you lower, do you lower in small increments like you raise in small increments,or can you lower in large amounts?
 
joeswm8 said:
wow thats big, ill get a ton of fans. You can also lower the core/mem too, right?

And just a general OCing question, when you lower, do you lower in small increments like you raise in small increments,or can you lower in large amounts?
Click to expand...

Yes you can lower it if you want.

And you dont need to take baby steps like 500 to 502. If you use ATI Tool, I would recommend have it scan for artifacts, then raise it up 10Mhz or so at first, then 5Mhz, and keep going until you see yellow spots in the display, then lower it back down until it stops.

Or you can use ATI Tool's "find max core/memory" feature, which will automatically determine the fastest speeds the card can reach before having artifacts.
 
thanks a lot, but just for general OCing, you dont have to lower it slowly right?

like you can go from 800MHZ down to 667MHZ in one step, right?
 
Yeah. The only reason people say to increase speeds slowly is so you know when you've hit the point where your GPU/CPU is unstable. If you increase by large amounts, you won't know exactly what clock is your maximum, and may do some permanent damage.
 
joeswm8 said:
thanks a lot, but just for general OCing, you dont have to lower it slowly right?

like you can go from 800MHZ down to 667MHZ in one step, right?
Click to expand...

I would go from 800, to say, 725, then 667. But why do you want to lower the speeds? And why to 667Mhz?
 
what are acceptable temps for a gfx card? currently ati tool says 33 at idle and 41 on full load, which is fine, but im thinking about oc-ing a bit. ive got a x700 pro and a zalman vf900 cooler.

on a side note, i was idling at 60 with the stock cooler..
 
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uhh yess..

you can OC any card...

get some good performance from that card 2...

just need the ATI OCing tool...
 
yeah i was thinking of getting a cooler for it, it has a stock fan mounted, would i by a new one, un-screw the stock fan and replace? or place over the fan


thanks


and what programs over clock it?
 
joeswm8 said:
is that just like the ATI Tool app?

Omega said the ATI Tool is better for nvidia and ATI
Click to expand...

IMO it is, because of the artifact scanning tool and speed settings being right there in front of you. You can also choose the speeds for 2D mode, 3D Low, and 3D High performance modes.
 
humor me.
what can an over clocked 7900gs be capable of?

and what cooling should i get for it, and do i take off the stock fan for it.

is that nvidia link good for it?


thanks
 
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