Apologies if this is in the wrong forum, I haven't used this forum in years and there used to be a hardware specific sub-forum. Also the title is vague but I will go in to detail.

Had some issues with my PC the last few months, usually related to booting/starting up. Often it would "fail" to start up, it'd get to the "Launching Windows screen", my peripherals would light up then it'd instantly restart.

Recently however it hasn't been restarting, it's been completely cutting off. It'll get to that screen then just go blank as if the power was removed. Last night I noticed that if I launch with no USB connections at all, it'd launch fine, then instantly power off when a USB device so much as touched the port. Normally if I restarted a few times (usually around 10) it'd eventually boot and I'd have no issues unless a USB device were to come loose.

After last night however, it won't even boot up at all. I noticed the Motherboard light was flashing, so I removed EVERYTHING (all power cables, SATA cables, fans etc) and the light went back to being solid. I re-inserted each connection one by one and the light remained solid, even putting USB devices back in. But it still won't boot up. None of the devices appear to be faulty since the motherboard LED usually gives this away. The fans spin for a split second then go off. I WAS tampering with the BIOS a little last night to try and solve the boot issues before I knew about the USB problem, but I didn't change anything I didn't know what I was doing.

I'm not sure what else I could try, so any advice is appreciated. I got some good advice when I first built this PC a few years ago (yes, years) from here so maybe someone can help. I can supply system specs if required.

Thanks

Yeah that's what I was thinking, I guess I'm ordering another 2gig this weekend then

also make sure card is set to do what the game tells it to do and not card tell software and software telling cardfiredrakes

Getting about 30-19 fps on World of Warcraft in outdoor places, yet a constant 60 in Instances. Also, for some reason it runs fine on most games with smaller maps (I.e FPSes) although my CSS fps is about 50 on the recommended settings. Not sure if this is normal or low for the card but it might be something else.
My current specs are:
600w OCZ StealthXStream PSU
9600GT GFX Card (PNY)
2GB DDR2 of RAM (Probably low for)
Windows 7
Intel Core 2 Duo E7400 2.8Ghz
Asus P5Q-VM mATX Mobo
500GB seagate something or other hard-drive.
Built this PC recently, all drivers are new as far as I know.
I think it's RAM myself as it only happens on open games and it can't load the terrain fast enough but I will check with people here first.
Any help appreciated.

It's starting to act really oddly now. A different thing happens every time I turn on. Sometimes it just keeps reseting on the Windows is starting up screen, sometimes it goes black after typing my password, sometimes it lets me on then bluescreens or crashes a few seconds after. These problems only started after attempting to put my card in.

Running off my Onboard card works, but trying with my GeForce either just keeps resetting or BlueScreens.

And turns out my onboard card bluescreens after a minute or so too.

Got onto desktop aaaand BSOD, twice. Ugh, now what....

You are a wizard O_O Worked straight away. Thanks alot all for your wizardry. :)

OK, I will give it a shot now. Disabling USB did nothing.

Removed my GeForce and am trying with my onboard one now.