Which PSU is best from these three?

[ruineddaedra]

I need at least 500w
Which of these are best.

Corsair CX500 v2
http://www.amazon.co.uk/Corsair-CMPSU-500CXV2UK-Builder-Series-CX500V2/dp/B005851O16/ref=sr_1_1?s=computers&ie=UTF8&qid=1357330865&sr=1-1

Corsair CX500
http://www.amazon.co.uk/Corsair-Builder-Series-Bronze-Supply/dp/B009RMP2VE/ref=sr_1_2?s=computers&ie=UTF8&qid=1357330865&sr=1-2

Thermaltake PSU SMART
http://www.amazon.co.uk/Thermaltake-SMART-80plus-Certificated-Supply/dp/B006DKGZLO/ref=sr_1_3?s=computers&ie=UTF8&qid=1356716683&sr=1-3

They are all the same price, and I do not want to spend too much more

Thankyou 😀

My specs
Asrock 960Gm-Gs3 Fx AM3+
AMD FX-4100
AMD Radeon 6870
8gb RAM

 

[AMD Radeon]

Corsair CX500 v2 hands down...
and avoid thermaltake psu

 

[ruineddaedra]

Corsair CX500 v2 hands down...
and avoid thermaltake psu

Ok Thanks
have you used this before. and if you have, how long has it lasted you?

 

[popatim]

I'd hit any of those. The smart is a decent psu too imo.

 

[ruineddaedra]

I'd hit any of those. The smart is a decent psu too imo.

On the PSU it says it delivers 408 watts on 12v rail, but my gpu requires at least 500w psu, according to AMD website, and that psu is 500w.
So Will the gpu be ok, or. . .

 

[popatim]

amd is recommending a psu not just the 12v rail and they have to rate higher than actually needed to make up for all the crappy psu's that can't put out their rated wattage. Truth is a quality 450W unit will run any single gpu system.

 

[samuelspark]

http://www.amazon.co.uk/XFX-P1-550S-XXB9-PRO550W-Edition-Supply/dp/B004RJ8EKI/ref=sr_1_1?s=computers&ie=UTF8&qid=1357358920&sr=1-1

Better than all of those easily.

Actually, you really only need this http://www.amazon.co.uk/Antec-VP450P-450W-Power-Supply/dp/B004BLMFSE/ref=sr_1_1?s=computers&ie=UTF8&qid=1357358957&sr=1-1 . That build won't consume that much power, regardless of what AMD says. I've seen 6870 and overclocked Phenom II's run on 430w.

 

[Silvune]

The CX500 (V3 / 80 Plus Bronze) unit is supposed to be superior to the CX500 V2, it also has more +12V capacity, so don't see why you would take the CX500 V2 over the V3.

You can even get the modular one for a similar price: (£50 @ Scan)
http://skinflint.co.uk/883467

But samuelspark is right, the XFX is easily better. And don't see why you couldn't use the VP450P.

http://www.anandtech.com/show/3987/amds-radeon-6870-6850-renewing-competition-in-the-midrange-market/20
Shows a system using an OC'd i7-920 and 6870 drawing 306W at the wall under Furmark. Furmark is a torture test, so power draw is usually much higher than in games.
Combined this with the fact those numbers were taken at the wall, means you have to take 10-20% off that number to get an idea what the PSU was actually delivering to the components.
So if there system was only drawing 306W it is unlikely that your system will draw more unless you are running torture testing programs. So in reality you only need a high quality PSU with the necessary connectors that can deliver at least 300W continuously.