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EVGA 7800 GT CO Overclock

post #1 of 12
Thread Starter 
Hey guys, i have just OC'ed my 7800 GT CO, these are the speeds, i have just used coolbits2

Core Clock - 493 MHz

Memory Clock - 1.16 GHz

http://img509.imageshack.us/img509/764/computergfxspeedszx1.jpg



I'm just curious, what else can i do to OC my GPU. And how these speeds are relative to other OC'ed 7800 GT's.


So any more info on how to OC some more would be greatly appreciated!


-Mark
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post #2 of 12
Do a BIOS vmod to get an extra .1v to the core. BEWARE though, make sure you have good temps before you make this mod as it will most likely bump the temps up a degree or two.

Here's a guide for the BIOS vmod using Nibitor and NVFlash: http://www.planetamd64.com/lofiversi...hp/t15247.html

Instead of using Nibitor 2.8, go to softpedia and get 3.0a, it's better and easier. And also, read the WHOLE guide (7-8 pgs) before you do the mod as there is crucial information on the last page that will make your mod a hell of a lot easier.
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post #3 of 12
Thread Starter 
so what exacly does this accomplish, does it allow me to OC further?
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post #4 of 12
Yes, it's the equivaliency of adding more voltage to your CPU, it helps you boost up your core clock.

You should get over 500mhz core on the 7800GT stable with the vmod.
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post #5 of 12
Quote:
Originally Posted by nForce
so what exacly does this accomplish, does it allow me to OC further?
Yes it will let you oc further. Before the mod I could detect frequencies at around 490-500ish and after 515-522ish.
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post #6 of 12
Thread Starter 
ah ic wow i just installed the X-treme G Drivers, and my latest oc got up to

Core clock-499 MHz

And memory Clock Freq - 1.18 GHz

And dammit i need a floppy, haha, might have to go out and buy one now to do the volt mod haha.
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post #7 of 12
Quote:
Originally Posted by nForce
ah ic wow i just installed the X-treme G Drivers, and my latest oc got up to

Core clock-499 MHz

And memory Clock Freq - 1.18 GHz

And dammit i need a floppy, haha, might have to go out and buy one now to do the volt mod haha.
Don't always rely on the "detect optimal" button, as it will frequently not work for your games. When I "Detect Optimal Frequencies" on my 7800GT, I get 496/1140 and 2 minutes into a CSS match it dies. In fact, with CSS, I have to run at 480/1080 to keep it totally stable, yet in BF2142, I ran it all the way up to 480/1180 without a hitch.

I don't get it...

Always test the clock with your games before you settle on that clock. and waht XG drivers did you use?
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post #8 of 12
Thread Starter 
Yea, .lol i just had to r-boot after play CS:S for like 2 min like you said ahha. So i will keep testing...



As for theses wonderful drivers i have the XTreme-G 91.45

Overclock.net Thread about them is Here: http://www.overclock.net/nvidia-driv...s-7800gtx.html

And direct Download page is here:http://www.tweaksrus.com/index.php?o...=729&Itemid=41

Try them out i love em!
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CPUMotherboardGraphicsRAM
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post #9 of 12
Quote:
Originally Posted by nForce
ah ic wow i just installed the X-treme G Drivers, and my latest oc got up to

Core clock-499 MHz

And memory Clock Freq - 1.18 GHz

And dammit i need a floppy, haha, might have to go out and buy one now to do the volt mod haha.
Thats a nice oc on a 7800, my old 7800 could only get 490 stable.
post #10 of 12
Thread Starter 
ahh wel its 494 stable now haha, cant run CS:S at 499 all the way down to 495. So 494 is where it stands stable now.
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