I bought an MSI 6600GT AGP for my SFF (G-Box) to upgrade the 9500 Pro card I had running in it. Installed card but cannot get it to post. System powers up, video card fan spins up but no video. I thought it might be the underpowered PSU (150 W) and am willing to mod the case to take a standard PSU. I tested with a new 500 W PSU but same deal - system powers up, video card fan spins up but no video. System specs are Mobo Chyang Fun S-868, CPU P4 - 2.60 Ghz. Northwood @ 2.96 Ghz., 768 MB Corsair PC 2700 XMS RAM, DVD / CDRW combo drive, 60 GB Maxtor HDD. New card will run in two older systems I have ( Abit KT7-Raid with Athlon TBird 1.4 Ghz. @ 1.596 Ghz. and ECS D6VAA with Dual 1.4 Ghz. PIII @ 1.575 Ghz.). Have tried everything I can think of. Anybody have anything they can think of to try let me know. I'll be disappointed if I have to buy a 9800 Pro now to upgrade the G-Box.