Back in August, my custom built computer had a catastrophic crash, and eventual death of power supply, which as a result took out the main HDD. I had since gotten parts replaced, but I've been getting frequent crashes. Sometimes a few a day, sometimes none for 3 days, but it's a constant issue. I know it's a hardware issue, since when it started, I've reinstalled windows clean many times to no avail. My main question is, what should I be looking at to try and switch out in hardware? I don't have a ton of money, so I can't just go out and try switching out everything. Since the power supply death, I've had some parts replaced just via warranty. The main HDD is new, the motherboard is new, the power supply is new. Half of my RAM was returned due to there being a bad stick, not sure if that was caused by the power supply frying it, or if it just had a bad stick in the first place. When it's up and running though, it runs perfectly fine, until it decides to crash. In which case, programs will either stop responding one by one, or they'll start closing one by one until the screen goes all garbled, black, then tries to reboot. After it tries to reboot, it can't find windows or something to start up, I have to shut the computer off entirely then turn it back on before it can even start up windows again. I took it to a repair place, which is the same place where I bought all my parts, but after countless trips there and them being unable to replicate the problem, I'm at a loss. I used to get actual blue screens on crash, but I bought a battery back-up surge protector with uninterruptable power supply, and it doesn't blue screen anymore, it just flat out crashes instead. System specs; Asus Rampage III Gene motherboard Corsair HX850W power supply OCZ Vertex3 SSD 60GB for Windows only Western Digital 1.5TB x2 for storage and games AMD Radeon HD 6900 video card Intel Core i7 CPU OCZ DDR3 Triple Channel 6GB RAM Also, when I first had the computer built, it ran perfectly fine for 6 months until the power supply incident. Any help would be greatly appreciated.