I know the title makes it sound not so general, but hear me out. Sorry, I wrote a book, but i need to be as descriptive as possible. My system: ASUS A8N-SLI Deluxe AMD X2 4400+ Antec 600W PSU seagate 120g sata I maxtor 120g sata I 7800GT 2x1gb OCZ Dual channel DDR400 Creative X-Fi saitek backlit keyboard Logitech MX Revolution Here's what's going on... this system was running perfectly fine for about a year, then out of nowhere, the mouse would stop responding randomly while playing games. The rest of the system was fine. I could type, open applications and do everything with the keyboard while the mouse was locked up. I started by wiping the drive with windows clean, and installed just my drivers, WoW and CS:S since those were the two games I was playing at the time. When that didn't work, I tried swapping out the USB keyboard and mouse for PS/2 keyboard and mouse, but the problem persisted. After a while of putting up with it, I noticed the northbridge chipset (nf4) fan was varying in speed. I replaced it with a thermaltake cooler with no luck. While I tried different things, I noticed that sometimes when my machine booted and listed the IRQs for onboard devices, it would show USB with an IRQ, but most of the time it would show ' NA ' for USB controllers. Then I gave up and picked up a cheapy ECS board with the same onboard periferals (nf4). I thought my problems were over and I started an RMA for the board. Then while I was playing, the mouse locked up again and I could still use the keyboard and the system was responsive just like before. I borrowed a 7950GT from my roommate and tried that in the machine, but that didn't fix it. I noticed it wasn't that bad this time though. Trying to think of what it is that is different, i opened winamp and started listening to music. Almost instantly it got 10 times worse. THAT'S IT! So i pulled the X-Fi sound card and fired up WoW. I played for about an hour and a half when I started noticing it again. Only this time it wasn't nearly as bad. But I'm out of ideas. The OS has no trouble booting, and had no trouble installing XP again. I let memtest86+ run overnight and it came up with zero errors. With that I ruled out CPU and memory. The only two things left in my machine are the PSU and the hard drives. The drives are fairly old, but I'm hoping someone here has some advice that I could take before replacing the PSU and hard drives. Thanks in advance! Nast
