High CPU usage in Home screen with ATI (1 Viewer)

[petsa]

TV-Server Version: 1.0.0.0 RC1
MediaPortal Version: 1.0.0.0 RC1
MediaPortal Skin: Project Mayhem III
Windows Version: XP Home
CPU Type: Intel E6600
HDD: Samsung 300Gb + 500Gb + 500Gb
Memory: 2Gb DDR2 Kingston
Motherboard: Abit Fatal1ty F-I90HD
Video Card: Nvidia 8600GT Silent
Video Card Driver: 169.21
Sound Card: Integrated RealTek HD
Sound Card AC3: Optical out
Sound Card Driver:
1. TV Card: Terratec 2400i (PCI-E)
1. TV Card Type: DVB-T
1. TV Card Driver: 1.0.3.266
2. TV Card:
2. TV Card Type:
2. TV Card Driver:
3. TV Card:
3. TV Card Type:
3. TV Card Driver:
4. TV Card:
4. TV Card Type:
4. TV Card Driver:
MPEG2 Video Codec: Cyberlink PowerDVD7
MPEG2 Audio Codec: AC3Filter
h.264 Video Codec:
Satelite/CableTV Provider:
HTPC Case: Antec Fusion 430 Silver v1
Cooling: Scythe Ninja Mini
Power Supply: Antec 430W
Remote: M$ MCE
TV: Video7 32"
TV - HTPC Connection: DVI

Hi all,

In my HTPC I have two gfx cards, one is the MoBo integrated X1250 from ATI and the other is an NVidia 8600GT Silent.

When I use the integrated gfx I get (one of) the CPU(s) running at almost full speed, but doing nothing it seems. As soon as I use the Nvidia card the CPU(s) sit nicely idling when in Home screen. I remember having seen a post about this before but I can not find it again.

Do you see the same issue with the integrated ATI graphics? I have the latest available drivers from both ATI and Nvidia.

I'm not sure if this is an issue with the drivers or with MP. Any ideas anyone?

/Peter