Hi, I recently got myself a second hand MSI GeForce 4 Ti4800se off ebay, unfortunately when it arrived the heatsink was all blocked up with dust and the fan did not work, I cleaned out the heatsink and taped another fan to the front of it. I then checked the airflow and that was ok so I put it in my motherboard, this card is an AGP 8x and my motherboard only supports AGP 4x but I assumed this would be ok. But on starting up there are lines down the BIOS screen, the display flicks off and comes on again every few seconds and it freezes on the Win 98SE startup screen with weird colours and flickering, I left it there for an hour and it did not change! I then replaced the card with my old Matrox G100A AGP 1x card and that still works fine!!! My Computer is: GA-7ZX Rev. 5 Motherboard AMD Athlon Thunderbird 1400 256MB PC-133 RAM Win 98SE Help!!, Please!