Hi I'v been having problems with my computer for about 6 months now. For some reason while playing particular games (mostly games that require LESS performance requirements like CIV 4 etc) about 20-40 minutes into the game the screen will suddenly fill up with strange graphical glitches, coming from various objects in the game (such as units on the screen on CIV 4). This is often followed by a complete crash, looping sound and the whole screen being filled with checkered green, purple etc tiny squares, and if left for about 20 seconds will cause the computer to restart itself. Another game that is doing this is Medieval 2: Total war. The battle parts of the game are fine but when i play on the campaign map thats when the problems occur and makes me think its a similar problem to CIV 4. It often happens in areas where there are higher FPS. I have tried Vertical Sync. I have tried all the latest drivers including moddified (have used drivercleaner PRO too) The graphics card itself is overclocked to the point at which it is recommeded as it is one of the ready-made overclockable cards. Both fans on the card seem to be working absolutely fine and i have cleaned the whole card including the rest of the hardware components. My specs are: GeForce 6800 GT Ultra Golden Sample 256MB (Latest Nvidia Drivers) 2 GB RAM ( two sticks of same brand) 60GB Harddrive RAM AMD Athlon 3200 XP Antec Truepower 2.0 - 480 watts (24-20 pin adapter, because my motherboard is crap and doesn't have 20 pin slots) nForce 2 A7N8X-E Deluxe (updated) I have 2 small fans that I have removed from other computers to try and cool the graphics card down a bit - during playing any game the card now gets to about 65C and remains constant. I have used the software "Speed Fan" to check all my fans and the results are: Temp 1 - 47C Temp 2 - 26C Temp 3 - -1C Temp 4 - 25C Temp - 124C Temp - 24C Local Temp - 33C Remote Temp - 38C HD0 - 30C There are 2 fans (Speed01, Speed02) that i can alter the % but other than that theres nothing else. Speed01 is on 13%, speed02 is on 0%. Automatic Fan speed is switched off. Fan1: 5000 RPM Fan2: 12054 RPM Fan3: 0 RPM Also i ran a test with another piece of software called "Pc Probe" CPU remains at a constant 47C Mother Board stays at 24C but i did notice that there was a sudden warning as the temperature spiked extremely high randomly. Also, heres my BIOS: Advanced Chipset Features: CPU External Freq (MHz): 200 MHz CPU Frequency Multiple Setting: Auto (Greyed out) CPU Frequency Multiple 11.0x System Performance: Optimal (Greyed out) CPU Interface: Optimal Memory Frequency: Auto (Greyed out) Resulting Frequency: Auto (Greyed out) memory Timings Optimal (Greyed out) SDRAM Acive Precharge Delay: 8 (Greyed out) SDRAM RAS TO CAS Delay: 3 (Greyed out) SDRAM RAS Precharge Delay: 3 (Greyed out) SDRAM CAS Latency: 3T FSB Spread Specrum: 0.50% AGP Spread Spectrum: Disabled CPU Vcore Setting: Auto (Greyed out) CPU Vcore: 1.650V Graphics Aperture Size: 128MB AGP Frequency: Auto System BIOS Cachable: Disabled Video RAM Cacheable: Disabled DDR Reference Voltage: 2.6V AGP VDDQ Voltage: 1.5V AGP 8X Support: Enabled AGP Fast Write Capability: Enabled BIOS Hardware Monitor: MB temperature: 24C/ 75F CPU Temp: 51C/123F VCORE Voltage: 1.66V +3.3V Voltage: 3.00 +5V Voltage: 4.86V CPU Fan Speed: 2500 RPM Chassis Fan Speed: 6136 RPM Power Fan Speed: 0 PRM Q-FAN Control: Enabled Fan Speed Ratio: Full Speed Speed Up/Down Response Time: 4 Sec/8 Sec ------- DXDIAG gives me the following results: DXDIAG "Operating System: Microsoft Windows XP Professional (5.1, Build 2600) System Manufacturer: ASUSTec Computer INC. System Model: A7N8X-E BIOS: Phoenix - AwardBIOS v6.00PG Processor: AMD Athlon(tm) XP 3200+, MMX, 3DNow, ~2.2GHz Memory: 2048MB RAM Page file: 167MB used, 3776MB availible DirectX Version: 9.0c (4.09.0000.0904) Thanks for any help I can get.