[m16si]

I have Radeon 9600XT 128mb ram

And my OVERDRIVE gauge worked from 499 to 526 core mhz......

Now i don't know why but it works only with 516 mhz core.



HElp

[LiquidSage]

Overdrive slows it down so the card operates at an acceptable standard. Generating artifacts or the card's temp going too high can cause overdrive not to max out.
Since overdrive is basically auto-overclocking, heat is probably why the speed went down.

Unless you have the modder's itch, just let it be. You probably wouldn't visibly see the difference anyways from the small drop it took and the card is not getting overstressed.

If you wish to OC it, get some artic silver and do a good lapping job on the heatsink you have or invest in some artic silver and get a better gfx cooler such as the ATI Artic Cooler. If you actually don't go for long periods with gfx intense apps, you may want to consider a silent passive cooler like the Zalman ZM80D-HP.
Also, cutting up an old heatsink and putting them on any bare ram chips will help a lot.

[boooggy]

try this: http://www.techpower...locking/vidcard