Psu help!

Any other choices ?

if the psu is under £90/$140 delivered to my door in uk  

Check on the Antec EA750.
I'm in the States, so searching is up to you unless you provide a link to where you intend to purchase

http://www.ebuyer.com/product/191826

http://www.ebuyer.com/product/159920

http://www.ebuyer.com/product/159921

http://www.ebuyer.com/product/173104

http://www.ebuyer.com/product/159923

http://www.ebuyer.com/product/164950

650W is more than enaugh for your setup.

by looking at ur links i can see psu 2 is as powerfull as crosair hx 750w and its only £73 compared to £118.

coolermaster gx : 60a 12v+Single rail 750w psu £73
crosair 750whx: 62a 12v+Single rail 750w £118


so shell i get the cooler master?

There's no cooler master in my links. Stay away from cooler master.

why stay away from coolmaster? it has some decent reviews.

Did you find a good independent review of the CM 650GX? Those customer reviews ('it works good for me') don't always give you a good indication just how good a PSU it really is.

Customer reviews are of extremely limited value. Look for a competent technical review (e.g. jonnyguru, hardwaresecrets) that includes load testing and waveform analysis under realistic operating conditions. Some Coolermaster PSUs are garbage, a few of the newer ones are good. All Antec (except <500W Basiq), all Corsair, and all Seasonic are good. Unless you're planning to Crossfire, then as mosox said 650W is enough.

psu is the only part which i dont have deep understanding about, i dont get whats the difference between quad 12v rails compared to single powerfull rail. i DONT KNOW which 1 is better and provides higher power for sli or single card.

can any 1 explain should i get a quad rail psu or single and if so why?. and secondly which 1 will provide more then enough power for my setup. 1 last thing... whats the difference between the two i mentioned above^ ?

coolermaster gx : 60a 12v+Single rail 750w psu £73
crosair 750whx: 62a 12v+Single rail 750w £118


why is crosair better then coolmaster when they both are nearly identicle specs.

Corsair HX750W Power Supply Review @ HardwareSecrets This is a good example of an independent test and review. This site has a good reputation for 'getting it right' about PSU quality and capabilities.

Without a similar type test and review of the CM 650GX you don't know if you're getting what you pay for or not.
Here is a different CM PSU review Cooler Master eXtreme Power Plus 600 W Power Supply Review

Cooler Master GX 750 W Power Supply Review only got an 'OK' review. This is probably a very similar PSU to the CM 650GX.

Cooler Master Silent Pro M 600 W Power Supply Review This version of CM PSU get a much better review.

just read the review, thanks you

1 last think for sinlge card and multi card config
is a single powerfull 12v rail better then quad 12vrail at lower Amps?

or shell i say whats the difference between the 2 for multi gpu /single gpu

That mobo doesn't support CF.

yes i know, but i want to know whats the difference between quad 12v rails and single 12v rails. and does it have any effect on multi gpus?

It's not an indication of quality. Everything else being equal there isn't any reason to choose a single rail over multi-rail PSU.

ty, understanding of psu has increased slightly:]

wr2 whats ur psu (750w) recomendation for my setup?
which is under £90/$140

what do u think about this 1:
http://www.ebuyer.com/product/124736
ocz gamer extremes 850w

A multi-rail PSU can be safer. There's marketing in it too, of course, but read the vendor voice thingy from Antec on Tom's main page. That explains it pretty well.

I could not find any review of the OCZ GameXStream 850Watts which is a little unusual.
Given the the price of the Corsair 850TX is only £24 more and it comes with a 5yr (vs 3yr for OCZ) warranty I think it might be a smart move going with Corsair.
Corsair TX850 Power Supply review @ JonnyGuru

I would also choose Corsair over OCZ.