OCing GPU not really showing improvement?

[b1gapl]

I have a 7600GT XXX edition 590/1600. I decided to OC it. The first run was when I just put my new system together. I used 3DMark01 for the benchmarks:
'01 - 23298
2nd:
(I reinstalled windows again, same clocks)
'01 - 23459
3rd:
590/1700 - 23425
4th:
605/1700 - 23441
5th:
tried the optimal button (641/1690) - artifacting in one demo, canceled test
last:
615/1700 - 23497

....With all of these OCs, the temps stayed the same. Is the last run a good improvement from the first? What I'm thinking is that it's not really worth it. This was all done on the stock cooler. And also is it worth, getting a zalman for it?

 

[Pepsiboy700]

IMO that seems pretty bad. I have a amd 4000 1gb of ram and a 7900gs. I overclocked the cpu to 2.5ghz the ram 210mhz and the video card to 550/1600 and I got over 2k more in 3dmark05.

 

[lancec2c30]

but their is really no comparison, Your stuff is way faster than his.

 

[Baez]

thats not that bad compared to a 7800GS i tried to OC. 3d2001se @ 475MHz: 26785. same card @ 550MHz: 24448. so i gave up

 

[zerodayATK]

hmmm.. my thought is since you only oced the vid card it didnt have much of an effect but negg? not getting that lol? but yeah try aquamark of sumthign else...

 

[CrazeD]

If your card is slightly un-stable due to heat you will get worse results. You can't really just shoot the clocks up and hope it's faster.

 

[b1gapl]

I don't think there was any heat issues. The idle temp is 40-42C, load is 57-60C.

 

[b1gapl]

I tried aquamark and got 72,778. Is that good for my system? The clocks are still at 615/1700

 

[zerodayATK]

well b1g usually you can tell that if you do your rig non oc'd

 

[b1gapl]

Well with the GPU back to default 590/1600 it went down 1,269 points. Significant drop?

...So far 615/1700 is the only OC that showed improvement with no temp increase. Should I leave it at that?