Which modular 650/750watt PSU should I buy?

OCZ ModXStream Pro 700w Silent SLI Certified Modular Power Supply [OCZ700MXSP-UK]
£73.99 inc VAT

or

Antec TruePower New Modular 750W Power Supply
£96.98 inc VAT
Out of Stock
or

Corsair HX 750W ATX Modular SLI Compliant Power Supply (CMPSU-750HXUK) [CMPSU-750HXUK]
£129.99 inc VAT

Depending on how rich you are.
 
Corsair are probably a little better. Question is whether you really need the 750W. Its the one I have but its a little bit of an odd one. If you need to crossfire something like a 5850/5870 you'd be better of with something with more grunt with at least an 850W. If on the other hand you have two Nvidia GTX 460's then a 650W would be adequate. If 650 is enough for your needs, I would go for a Corsair 650W psu.
 
shadow_boxer said:
Corsair are probably a little better. Question is whether you really need the 750W. Its the one I have but its a little bit of an odd one. If you need to crossfire something like a 5850/5870 you'd be better of with something with more grunt with at least an 850W. If on the other hand you have two Nvidia GTX 460's then a 650W would be adequate. If 650 is enough for your needs, I would go for a Corsair 650W psu.
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I call BS. GeForce 460s 1GB use more power than Radeon 5850s. You're wrong with this one then. Plus you can run them comfortably on a quality 650W. They won't use near this much power with an oced CPU and GPUs - and we're talking Furmark here. Real world power usage won't exceed 65% anyway. 700W unit is just fine for Crossfire 5870s. 850W is an overkill.
 
changed my mind - going for the 750w corsair. 19 quid cheaper on another site though so wont be 'ocuking' it this time.
 
Dumb question.

Is there a difference between Modular PSU and a PSU withouth modular in the title? if so, kindly point me to some idiots guide please.
 
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