I'm using a gadget to monitor my cpu core activitity and it tells me all 4 cores are kicking at 100% during the test which is a relief to me as there's nothing worse than under utilizing your specs... core 3 and 4 for some reason are 1 degree higher in temperature than 1 and 2... (of course I'm not sure about the accuracy of these tools as yet..) So here it is... ATI radeon HD2900XT at factory default and overclocked
Q6600 cpu at 3GHz....
Components Your System
Processor Intel Core 2 Quad 3005 MHz
Physical / Logical CPUs 1 / 4
MultiCore 4 Processor Cores
HyperThreading N/A
Graphics Card ATI Radeon HD 2900 XT
Graphics Driver ATI Radeon HD 2900 XT
Linked display adapters No
DirectX Version 10.0
System Memory 2048 MB
Disk Space 476.94 GB
Motherboard Manufacturer MICRO-STAR INTERNATIONAL CO.,LTD
Motherboard Model MS-7345
Operating System Microsoft Windows Vista

The RESULTS:
Below is the result details of your submitted project.
Main Test Results
3DMark Score 11469 3DMarks
SM 2.0 Score 4469 Marks
SM 3.0 Score 4854 Marks
CPU Score 4208 Marks
Detailed Test Results
Graphics Tests
1 - Return to Proxycon 34.626 FPS
2 - Firefly Forest 39.863 FPS
CPU Tests
CPU1 - Red Valley 1.373 FPS
CPU2 - Red Valley 2.064 FPS
HDR Tests
1 - Canyon Flight (SM 3.0) 43.976 FPS
2 - Deep Freeze (SM 3.0) 53.104 FPS
I think this card does well actually, and I have a sneaky suspicion than it will do ok once they optimize for DX10 and we get some good DX10 benchmarks out there... and then if needed... i will get rid of my stock cooler for the GPU and put some good cooling system in.
Notice something....???? SM2.0 results are actually higher on default than an earlier overclocked speed... this is probably because i've had my card to prioritize performance over quality... it only concludes to me that 3dmark at demo version will only judge based on the number of frames per second and not on the actual quality of what we see... which is ok i guess... coz i didnt notice any difference...at least at this level of 3D mark.... but i like this... these settings will do for now.