Good OC Numbers for 6600GT AGP

[xanis]

I have an old system in my house with 1GB of PC2100 RAM, a P4 @ 2.8GHz and a Chaintech 6600GT 128mb AGP card. Anyhow, my friend wants to buy the 6600GT off of me and would like it overclocked. Can someone tell me what the highest, safest numbers for mem and core clocks on my 6600GT are? I never really bothered to OC it before because I only overclocked the card from my first build (XFX 5200) and my current card (EVGA 6800GS). Cooling is stock, and I put some AS5 on the GPU. He has 2 case fans, one front and one back, not including the one on the PSU. Thanks a lot for your help.

EDIT: Not sure if this was supposed to go in the Video forums, so if its in the wrong spot, please move it.

 

[Somniferum]

Originally posted by: Xanis
Can someone tell me what the highest, safest numbers for mem and core clocks on my 6600GT are?

LOL, how could anyone on this forum possibly know that? Every chip is different. The only way to know the limits of your GPU and memory is to test them.

Start with the GPU. Bump it up 5MHz at a time, and run a video-intensive benchmark (I use rthdribl and Aquamark3, but there are others) for several minutes after each increase, watching for artifacts or other anomolies. If you see artifacts then you've reached the limit -- back off 5MHz and write that number down.

Then set the GPU back to default and test the memory the same way.

When you find the max of both the GPU and memory, overclock them both together and run your benchmarks again. You may have to back off some with both overclocked simultaneously, due to the extra heat produced.

Once you find good speeds for both GPU and memory together, you should run some longer-term tests to verify stability. Run the benchmarks overnight, or spend several hours gaming. Any visual anomolies, freezes, or crashes indicate that your hardware is not stable at those speeds.

It's a process, and it takes time. There are no shortcuts to a stable overclock. If you just look at someone else's numbers with the same card, you might as well pick a number out of the air because you are just guessing.

 

[theMan]

my xfx can do 550mhz/1.12mhz

 

[spiritwalker2223]

Mine does 562 & 1060(AGP) with very few artifacts

 

[diapickle]

I saw someone getting 1.3 memory clocks with 6600GT 256