Quick 1900xt question

[filmbot]

My friend let me borrow his 1900xt yesterday and Ive been testing it nonstop since and I have ran in to something that I cant figure out.
It seems right around I hit the 700 mark with my memory my 3D Mark scores steadly started to get lower as I went higher.
Im using ATi Tool .25 beta 12 at the moment and I know Ive heard of it loosening the timings but I want to ask you guys if this is for certain the case or if its something else.
Also, if it is the case should I just go back down to where my scores fianlly peaked or keep pushing and it will soon out weigh the timings?

[ahmad]

It can be voltage deprived, or it can be heat. ATiTool pre beta 15 releases do not change timings. Either try some more voltage tweaking, or work on the core.

BTW, default memory frequency is 721MHz on the XT. So I assume you either mean core, or 800MHz memory...

[filmbot]

Thats another thing I was confused about.
ATi Tool says 500/600 and on CCC it says current GPU and Mem clocks are the same but where it says requested it says 721 for the mem and thats with no OC with either tool.
Is that 2D speeds or something?

[ahmad]

It is.

[cantankerous]

try at least ati tool 0.25 beta 14.