|I wouldn't go by that newegg figure. |
"I have a Thermaltake PurePower 500w PSU"
See my info in the last response of mine. That meets the minimum PS capacity requirements for the XFX 4890, and if you get a 4850 , or 4870, their minimum PS requirement is a little less than that - 450 watts I believe.
"Would I see any performance increase if I bought a better PSU, and kept my current GPU?"
No, of course not.
If your current PS meets or exceeds this requirement with your current video card, or a video card you're thinking of buying, you don't need to be concerned about it's capacity:
"Your power supply must have at least the minimum capacity required to support a system with the graphics card you are using installed, or the max graphics card you might install in the future.
(Onboard video - video built into the mboard - IS NOT A CARD!)
You can go to the video card maker's web site and look up the specs for the model - often under system requirements - the minimum PS wattage, and, more important, the minimum amperage the PS must supply at 12v is stated. If you don't find that, any card with the same video chipset including any letters after the model number has very similar minimum PS requirements."
"Some power supplies have more than one +12v amperage rating..." (they have two) "...- in that case you add the rated max amperages to determine the total +12v amperage rating.
Thermaltake is one of the brands that has decent amperage ratings at +12v , what they should be in relation to the wattage capacity, so that probably is not a problem.
You can get a PS with more capacity in any case if you like, but you don't currently require one.
From what I've seen personally seen, and read on the web, the 6400+ is an excellent cpu, the best one of it's type. When the first Phenoms came our, reviews said it out performed them all , overall.
If I were you, I would upgrade the video card and get a PS with a larger capacity if needed for the card being on the system. If you upgrade your system later with components rather than buying an assembled system, you'll probably need a PS with more capacity in any situation, so buying one is not wasted money in that case, and you'd certainly be able to use the video card in a newer mboard.
How many cores a cpu has is mostly marketing hype.
Most people have very few programs, or no programs at all, that can use more than one cpu core. Server operating systems and some server software can use more than one core, Vista and Windows 7 can use more than one core if you use a program that can use more than one core, and some recent games can use more than onecore in Vista or Windows 7. Other than some recent games, most programs that can use more than one core are usually a lot more expensive to buy.
By the way, the peformance bottleneck in modern systems is the speed of the hard drives.