[Solved] Custom pc just crashed after a year of working

I was playing mass effect and my pc crashed. My monitor went blank like it was not getting anything from my video card. I am pretty sure it is a hardware issue. I powered off my comp and when I tried to turn it on again, it would "power on", fans spinning, lights but no monitor activity. After 5 seconds or so it would power off and then attempt to power on again. This goes on until I flip the PS switch. It acts like it does if I had attempted to overclock and it fails. It tries to boot 3 times then reverts to default values. But in this case it never boots.

I am thinking a video card issue. How can I be sure? What else could it be? I don't exactly have spare parts laying around so I can't just start swapping out components.

I don't think comp specs are that relavent. Comp was hand built with great, quality parts and ran fine for a year or so. Please help

Q6700 at 3.34ghz
4gb 1066mhz OCZ Reaper
HD4850 512mb
I'll try the ram suggestion and post back asap

Do you have 4 1GB sticks or 2x2GB?

That's the first place to start. Let us know how it goes. My money is on a bad stick of RAM.

Alright, after a good cleaning. I took out all 4 sticks of RAM and put the first one back in. Same result. Next one, it boots. So I finish the test and then put 3 back in.

I boot to windows fine, programs work good. Then I boot a game up after a few mins of gameplay, it crashes. The bad mem crash where the sounds repeat over and over. So I take the last of the older sticks out so I just have two in.

I boot, same processes work, then to the game. I get farther, and it crashes. BSOD this time. This happens twice. Once it happened even on my desktop.

Not sure whats up, this is all high quality ram. Not sure when I'm gonna crash next and I'm afraid to boot anything too mem intensive.

On a happy note, it looks like its not the vid card lol

Burn a copy of memtest to a cd and boot off of that, use that to check your memory for errors, its possible one of the sticks has started to fail.

Nope, the temps look good. I would continue to focus on the RAM.

2.1v is kinda high from ram isn't it? I think thats what the stock settings are supposed to be

1066mhz 5-5-5-15 timings.
OCZ Reaper HPC

600W power supply

Few problems with Memtest86. I have a burned iso for the OCZ version, original, and the RamProbe verson. All of which dont appear when I boot my pc. This is the first time I've used memtest on a vista 64bit but other than that, i dont know why it wont run.

Your PSU is low quality. Try a better quality PSU.

I'll try to bump it to 2.2v or a bit higher and see if it works. I might need to look at warrenty info to see if I can replace the one or two that went bad for some reason. If I can get these to post stable anyway.

Its not a really expensive PSU but its served me great for a year and a half. Never had any problems with it. Not really ready to pump out extra cash just cause its not top grade. Why should that really matter?