My put up a HTPC:
AMD A8-6500 CPU + Some efficient 12cm cooler
Gigabyte A85XM-D3H MB
Corsiar XMS LowProfile DDR3-1600 4GBx2
ADATA SX900 128 GB
Antec VP450 PSU
The system crashes in both Win7-64/Win8-64 when I try to run PC-Mark or "rate this computer" of the windows rating system. I have tested the SSD and the RAM. I have updated the MB BIOS and all the drivers to the newest official verson. When the system crashes, the fan still runs but no video signals out from the HDMI. The Power Button and the Reset Button on the case does not work during the crashes.... Only the hard switch on the PSU works... Any clues?