I’m not sure if anyone can help – I’m having problems with my newly installed HIS Radeon 5870. It doesn’t seem to be running at full speed (Windows 7’s Experience Index test rates it at only 2.0) and video playback (in both Quicktime and Windows Media Player) suffers from judder and flicker. The system ran perfectly with the previous graphics card and since its install the sound, even on standard windows sounds, crackles (I’m running this through the motherboard’s onboard sound and not the HDMI cable, although the problem exists there too if I switch to that).
The GPU is 62 degrees at idle and the clocks are not dropping from 850/1200 at idle either. The card also appears to be continually under 25% load even when idle.
The Spec of the system is as follows:
Asus P6T7 WS Supercomputer
Intel i7 950 @ 3.07 ghz
6gb of RAM
350gb Raptor – boot drive
1.5tb Seagate- network drive
8 x Seagate 1.5tb drives in a RAID 5 array via a Highpoint RocketRAID 2320
Pioneer 5090 Plasma display @ 1920 x 1080
Corsair HX450W running RAID array and a 1000w supply feeding the rest
I’m running the Windows 7 Ultimate 64bit release candidate with all updates installed. I’ve tried each version of the 5870 drivers including those packaged with the card, ATI’s latest drivers and the beta RC7 driver. The problems persist with each. I’ve direct x 11 installed and I’ve tried running the signal through both DVI and HDMI. I’ve also tried the system on an old monitor instead of the Pioneer Plasma and the problems with display, though lesser due to the decreased resolution, persist. To my eye, there doesn’t appear to be any relevant settings in BIOS, with the vast majority of settings on auto. I've tried different PCI-E slots, powering the 5870 from the Corsair supply and a fresh Win 7 install.
If anyone could suggest where to begin trying to get the card working and eradicating the problems with video playback I’d be most grateful.