enough power??

With a setup like that the only thing that would lead me to believe is your PSU, there should be no video lag, or anything. Maybe a defective piece of hardware, but it is kind of unlikely. On the side of your PSU, there should be a label with a chart usually. Tell me how many amperages are on the +12v rail. I haven't heard many great things about the Thermaltake PSUs. Also, what are your temperatures at? Does your PC totally reboot when you play a game? And is the screeching sound coming from your PSU?

It's not possible to see what your +12v rail is through your BIOS or any software that I know of unfortunately. The only way to find out is know your brand, and model, or check the side of your PSU for it, usually the label will be facing you when you take the panel off, unless you installed it backwards, which really doesn't matter.

I didn't install the psu so I don't know if it's the wrong way around. I'll seen if i can find my psu specs online.

i checked and I have 11amps on the +12v rail.

yes, i have the latest drivers for my hardware as for power variations, no.

I bought the pc of the internet and it was custom made. Will updating the BIOS auto detect the normal setting so it won't crash anymore?

Yea, well i'm pretty stuffed since i bought my pc of trademe.co.nz and the seller has been banned.

uh... then you're f*cked
you can try looking at bios settings before updating... if it has some kind of memory os cpu overclocking, and check for power voltages

that's the hardest part... one method is to eliminate components one by one, for example: change your video card... if it crashes, then it's not your video card and you do the same with other component.

ah, you can try to look at http://www.memtest.org/, it's a memory test.
bad memory can lead to freezes or sudden reboots...

Ok, thanks a lot. I think i will start with the video card causemy warranty is basically viod anyway. Ill try take the memory sticks out too. But the weird thing is that the crashes aren't exactly random. Every time i turn the pc on it freezes after a few min and then it only freezes when im playing games. If it was a hardware malfunction wouldn't keep freezing after i've restarted the pc after the first crash? My pc crashed this morning and i've been on it for a few hours surfing the web and i haven't crashed. But if i now go on a game it does....

Is it possible that it's a software issue because the pc only freezes at certain times and only on certain applications?

I found the details on the back of the pc where the back of the psu is. The info is partly covered by the metal rails, it is 11amps but it might have 2 +12v rails.....

I can't find and info on the Thermaltake T-8020a. Even on Thermaltake's website. It might be an OEM part for system builders only.

Yeah, you should have two 12v rails and a 430w typically can provide around 24 - 28 amps on the 12v rails for a minimum total of 228 watts. That is more than enough power for your system so that rules out the PSU.

I think you have a device driver issue. Since you have on-board sound try to disable it in the BIOS and uninstall the audio driver using "Add/Remove Software" from the Control Panel. Look for something that says "Audio" or "Sound".

Reboot and try surfing the web and playing a game without sound (yes quite boring but we need to do some testing). If that solves it then download the lastest drivers for the ob-board sound and install. But first reboot and go into the BIOS to re-enable the sound first, otherwise the on-board sound will not be recognized.

Is your PSU a Thermaltake PurePower? Thermaltake makes a 430 Watt Purepower PSU, which it only has 1 12v rail with 18 amps on it. I think that you need a new PSU, or try to unscrew it so you can see if it has a 2nd 12v rail, which I highly doubt it will.

First, flash you BIOS to the latest release

This could be a driver conflict, so when you are in BIOS, disable the Onboard AC '97 sound, and try running the system without it.

If that doesn't work, remove one memory module, try booting up and if you get the same error, insert that module back and remove the other one. That should cover any defective memory.

Furthermore, check all heatsink and fan connections. It's probably not a heat issue, but check anyway. The CPU hsf, the GPU hsf, and the case fans all need to be checked.

Finally, yes, it could be the PSU. When a system draws more power than the PSU can put out, it will normally reboot, freeze, or turn itself off for no other obvious reason. The screeching thing is new to me, but stranger things have happened. And the low Amperage level on that 12v rail does seem suspect, so you would probably want to consider a new PSU regardless of the ultimate conclusion because a failed PSU has the bad habit of toasting other components when it dies, namely the Mobo, GPU or HDD's.

Are you running the latest Nvidia drivers? I highly doubt it's his videocard, that card will beable to run Guild Wars and BFME2 fine on the highest settings. It may be defective though. Do you have another videocard to try out?

Heheh I've got a Antec NeoHE 550Watt pau, and it runs soooo quiet.
I'm very happy with waht I got

Ok. I have disabled the AC'97. Now i have to turn my pc off for 30min then switch it back on to see if it freezes.(fingers crossed)

AC'97 is just your integrated audio, which I doubt that would be a problem on start up. Have you updated your video drivers to the latest version yet? Also, I've never heard of Ramos.

YESSSSSSSSS!!!!!

The problem has been fixed!! Thanks a lot for your support and help people. The problem was a faulty RAM module which i took out and now the pc works perfectly!