Unfortunately we only have one computer repair place in town and they seem unwilling or unable to properly diagnose the problem (when my build died they told me the problem was the mobo, and I bought a new one before discovering it was in fact the GPU, as I first thought). So I can't know for sure, but I've grown increasingly suspicious that the problem is the PSU. It's a Truepower Trio 650. I have an athlon X2 4600+, 2 gigs of PC26400 RAM, and an HD 4870 GPU (I know this is out of sync with the CPU, but I had to upgrade when the old one died and thought I may as well get a good'un).
So I need a PSU not just with enough juice to run what I have but with some future-proofing for when I get around to upgrading my CPU and maybe even beyond. I'm thinking probably around 1000W. I did a quick search on my local online price comparison site (I'm in Denmark, so no NewEgg for me) and found some specs for a 1000W PSU (CoolerMaster Silent Pro I think it was) that has 8pin PCI-E connectors, with 2 attachable pins. Does this mean new GPUs are using 8-pin instead of 6, but 2 can be detached to allow it to interfact with the older GPUs? Are there any other compatibility issues I need to be aware of? Other than being able to run a good GPU I don't really have any special hardware needs, just the basics, RAM, CPU, optical drive.
So please educate me a little on what I need to look for and give a couple specific model recommendations.