I've got this problem with my new PC (don't wonder the lousy video adapter, I won the whole system in lottery...).

The problem is my X600 stops responding quite often, resulting in black screen and (after that) driver stating that the VPU has been recovered and reset. This has happened few times during normal desktop usage, but more often it occurs while playing.

I have tried Atitool to test the core and the memory. Core can be overclocked from 400MHz to over 500MHz without errors, but memory will have problems when overclocked as little as 5MHz (from 290 to 295MHz). At the default frequencies the card has performed fine when tested with Atitool, though I have only tested it for about 20 minutes.

This problem occurs whether or not the card is overclocked.

Could it be a driver related issue, or is some physical defect more likely? What to do?

System specs: P4 3.2GHz + Intel D915PGNL motherboard, 2 * 512MB DDR PC-400, Radeon X600 Pro 256MB, WXP Home SP2 (all updated), DX9.0c, Ati Catalyst 5.6 drivers