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PSU: 650W 80+ VS 750W

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General specs of my next rig

i5 2500k (OC to 4,2Ghz)
8Gb 1333Mhz RAM
Antec H2O 620 cpu cooler
Gigabyte Radeon HD 7870 OC Version
around 5 fans
ASRock Z68 MOBO
500gb HDD
120Gb SSD

Which one of these PSUs should I buy?

Rasurbo Real&Power 650W 80+
http://www.mindfactory.de/product_info.php/info/p688576...

Rasurbo GaminX&Power 750W
http://www.mindfactory.de/product_info.php/info/p667804...

Will the 650W be enough or should I go for the 750W? (same price)

More about : psu 650w 750w

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Best solution

Power supply Master

A system with an HD7870 requires a good qualty 500W PSU with 32A on the 12V rails and two 75W PCIe power connectors. Your system only has a mild OC on the processor....taking a look at the site you linked a great PSu for around the same price is the Superflower Golden Green 550W: http://www.mindfactory.de/product_info.php/info/p688894...
or the Seasonic S12II-520: http://www.mindfactory.de/product_info.php/info/p640838...

That Superflower is a great PSU and would be my preference. It's 80+ Gold and well reviewed by many reputable sites. The 45A on the 12V rail is more than enough for your build and significant OCs on the CPU and GPU.
Power supply Expert

Bofink said:

Which one of these PSUs should I buy?
(same price)


The answer is neither out of those two. The options that Rugger said are much better options.
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Power supply Master

Rasurbo has a reputation for crappy PSUs because of the OEM they use.

Any company that uses HEC/Compucase as the OEM for their power supplies suffers from that same stigma.
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