How can I check how mutch 'work' my videocard is doing during HD playback? (1 Viewer)

[ThaClown]

TV-Server Version: TVEngine3 Snapshot: 05-06-2007 01-22h Revision 14527
MediaPortal Version: MediaPortal 0.2.3.0 RC1
MediaPortal Skin: Revision 1.1.0
Windows Version: Windows XP, sp2
CPU Type: AMD Athlon 64 X2 3600+
HDD: 1.78 TB..... 4x Seagate 320GB SATA2 8mb (2 via network on work PC) and 500GB USB2 8mb Mobile MyBook
Memory: 1GB: 2x 512Mb DDR2 667MHz
Motherboard: Asus M2V-MX
Video Card: Club3D HD2400 pro lowprofile
Sound Card: Integrated
1. TV Card: Floppy FireDTV
1. TV Card Type: DVB-C
1. TV Card Driver: BDA 4.7
MPEG2 Video Codec: FFDShow and Haali mediasplitter
MPEG2 Audio Codec: AC3
Satelite/CableTV Provider: Casema (Cable)
HTPC Case: Silverstone LC11 black (no alot of room but it rocks)
Cooling: St. AMD Athlon64 cooler
Power Supply: Silverstone 300W-SST-LC11
Remote: Microsoft MCE remote, MCE keyboard
TV: Samsung LE40F71B FullHD (it is just amazing!! no need to go outside for movies anymore)
TV - HTPC Connection: HDMI

I's like to see how mutch 'work' my videocard is doing during HD playback, what software should I use for this? and are there any good tweaks or settings to get the best performance?

Thanks to all of you for this great product and great support