550w is plenty for that system, especially if it is a quality PSU.
In the specs it says 600w. Is that the power supply in the deal?
Recom 600W 80plus BRONZE Power Silent Powersupply"
That? I think that's the one which comes with it, could be wrong.
Does it make any difference?
And also, since they've overclocked the CPU what would this mean? Will they cover for costs if it degrades, or provide me a warranty for that?
Also what about the cooler? Will that be sufficient?
* PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard
* 500 Watt or greater power supply with two 75W 6-pin PCI Express® power connectors recommended (600 Watt and four 6-pin connectors for ATI CrossFireX™ technology in dual mode)
* Certified power supplies are recommended. Refer to http://ati.amd.com/certifiedPSU for a list of Certified products
Here's my rule of thumb w/ jonny ......If you gonna run "stock" w/ one GFX card, be happy with an 8.5 jonnyguru performance rating......add a 2nd card or moderate OC, go to a 9.0 rated unit, moderate OC's and a 2nd card .... 9.5 ..... and twin cards, serious OC's, I'm looking for a 10 rating.