Can a 450W (230Vac, 4A, 47-63Hz) PSU run a R9 270?

zeyaa · Mar 2, 2014

12V1 21A 12V2 18A and 72% efficient. MSI Radeon R9 270 Gaming Edition.

clutchc · Mar 2, 2014

Depending on the watt rating for the +12V rails, I'd say yes.

terry4536 · Mar 2, 2014

Probably, but you wouldn't have much headroom.

zeyaa · Mar 2, 2014

Would having 1 or 2 bitfenix 12mm fans(with LED's) do much difference in power consumption? Would I still be able to run the 270 and the two fans on my psu? One 12v rail has 21amps and other 18 amps. Also would I be able to add another 8gb ram stick ? My specs: i7 3770, 1x8gb ram, MSI 7770 1gb, 2tb 7200rpm HDD, and DVD drive.

terry4536 · Mar 2, 2014

No, the fans or RAM wouldn't matter much watts wise.

clutchc · Mar 2, 2014

Fans, LEDs, drives, demand very little from the +12V rail. Your gfx card and CPU are the big loads on the rail(s). The gfx card usually being the biggest.

zeyaa · Mar 2, 2014

Overall, do you think I will be fine with this GPU and fans with my PSU?

clutchc · Mar 2, 2014

What is the make and model of the PSU?

zeyaa · Mar 2, 2014

CWT GPA450P. If you go on Google and type in Cwt power supplies and go to their website it should say products. Then go on power supplies and go on M-atx I think or something like that. There will be info about it. Mine is 450w.

hunter315 · Mar 2, 2014

zeyaa :

That efficiency is god awful, especially for a unit running on 230V, its going to be a super cheap design that isn't going to last a long time. It also only has 360W(30A) available between its 12V rails, that isn't much at all. An R9 270 needs about 150W, that only leaves 150W of capacity for your motherboard and drives which isn't much at all.

I would steer well clear of that unit in general, regardless of what you intend to run on it. The Corsair 430CX is a significantly more efficient and more powerful unit.

http://www.cwt.com.tw/Product/enus/Product_ThirdShow.aspx?Series=2E73C062DE0A456394BF65AD2847EDE3&Category=ATX12V%20%20%20%20&Model=GPA%20Series

clutchc · Mar 3, 2014

zeyaa :

If the 450W unit listed on this page: http://www.cwt.com.tw/Product/enus/Product_ThirdShow.aspx?Series=2E73C062DE0A456394BF65AD2847EDE3&Category=ATX12V%20%20%20%20&Model=GPA%20Series
...is your PSU, it appears to be a typical low to medium quality PSU with a rather low 72% efficiency rating. Not the best choice for that class of card. I imagine you could get away with using the R9-270 (150W... 12.5A @ +12V), but I would suggest that your next expenditure be a better PSU.

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Can a 450W (230Vac, 4A, 47-63Hz) PSU run a R9 270?

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