I have an EVGA 8800GT I bought, Open Box. It's been working thus far, no troubles, playing 2 games I want with full settings. The Sims 2 and Myst 5. Not too graphically heavy apps. Today, I turned on my PC, and started up the apps I normally use for downloading, (uTorrent and PeerGuardian 2). Aside from Avast being up, there was only the nVidia driver tray running on my computer, which is always normal to see in the system tray. Turn off the monitor, go back to bed as this was early in the morning. Hear a system beep; the POST Successful single beep. Okay, it rebooted itself, no idea why. But Windows wouldn't start. And there were multi-coloured dots on the screen. Reboot and see them on my BIOS screen, everywhere, multi-coloured dots. Finally boot into safe-mode, download the initial BIOS release for my motherboard, set it up, and still, nothing was fixed. Like I said, this all started with a sporadic reboot, when no graphical apps were even open. Any ideas? I did a Virus scan with Avast, and Ad-Ware scan with Ad-Aware. No spyware scan, SpyBot wouldn't work in safemode. System Specs: (All stock speeds) Intel e8400 CPU (Recently replaced cooling fan with Thermaltake) ASUS P5N-D Motherboard (Problem started when running latest BIOS, not resolved when reverting to original) 2 GB Kingston RAM (2*1GB Sticks) Generic 500-Watt PSU (Still working from my previous machine, so I decided to use) Seagate 500GB S-ATA HDD nVidia 8800GT latest drivers (Open Box when bought, assured no problems) And like I said, everything was fine last night. I'll try to get working on screenshot to see you, but the dots are Horizontal blocks or multi-coloured dots with spaces between each block.