I am going to buy i7 tell me which PSU i have to use
Intel core i7 920
ASUS Rampage 2 Gene
3 GB Corsiar dominator TRI Channel
Segate SATS 500GB
DVD Drive
ATI Radeon X1550

soon i change my vedio card i will bought ATI 4890

when i check on PSU calculator on ASUS Support site it will me your recommended PSU is 550watt

i think i buy CoolerMaster 600watt PSU

Please Help me in buying PSU

A 550W will be fine for a single 4890 but if there's a chance you may crossfire or upgrade in the future then go for a 750W unit if funds permit.

The higher power Coolermaster power supplies aren't bad but go for something from Corsair, OCZ, PC Power & Cooling , etc. if you can.

Have a look at the recommended power supply list here on OCC for guidance and ask if you aren't sure.

Cheers

Paul

Recommend corsair 620w ,made by seasonic, modular ,low ripple,quiet and 80 plus certified.

600w is good for any single card pc build with power to spare.

If you don't want modular or cheaper psu, go with any other corsair...you can't go wrong with this brand.

tx 650
tx 750

Thanx
ok
what you think about ASUS 650Watt PSU and Silverstone 650Watt PSU

You got any model numbers for them?

You are in Pakistan right? Are you not able to get OCZ, Corsair or PC Power & Cooling or are the prices too high?

Cheers

Paul

Thanks
ok i will buy Silverstone 650watt PSU

why coolermaster 600watt PSU is not good as compared to other

Tell me the specific model/part numbers of the power supplies you are looking at and I'll see what I can find out.

Coolmaster power supplies aren't bad as such but there are better. The higher power Coolermaster units are the better ones, have a look at the recommended power supply list.

Cheers

Paul

i am looking followin 2 PSUs

Coolermaster eXtreme Power Plus 600W
(RS-600-PCAR-E3)
--------------------------------------------------------------------------------
SilverStone SST-ST65ZF 650W

I find it hard to recommend either of these power supplies. Don't get me wrong they are probably quite capable of powering your system but I cannot find any reviews of any real value on the internet. This tells me they are low to mid-range unit. I would prefare you used an higher end unit like Corsair, OCZ, Thermaltake, etc., of 500~600W rating if possible. Having said that I found a little information on the Silverstone that tells me its "OK" and of the two, with it's higher rating, that's the one I would reluctantly recommend.

Cheers

Paul