PSU for R9 270?

[MachineKillx]

Hey guys, I'm almost confident that the 400w psu will work,  you think so too, right?

[Pugs501]

I would suggest getting 500w+ Power Supply

[Bogica]

500w+, I'd got with 500 as minimum.

[Hieb]

Depends on which 400W unit. If it's a decent PSU and has at least a 6-pin power connector I would expect it to run the R9 270 without issue, unless you're also running an FX 9590 or something

[ThE_MarD]

Heyyo,

 

Put your rig together on this website and it will tell you estimated Wattage, I'd recommend having a PSU a minimum of 100 Watts above what it estimates. You never want your PSU to be running near full load all the time, that's when they run hot and can actually lead to stability issues:

 

http://www.pcpartpicker.com

 

For example? Here's my PC:

http://pcpartpicker.com/b/sNPscf

I have an 850 Watt 80+ Bronze PSU and my setup is an estimated Wattage of 653 Watts. My PSU then should be averaging about 77% estimated load (653 / 850 = 0.768). That's plenty of breathing room. My PC and PSU are happy.

 

Also? This is Linus Tech Tips!

https://www.youtube.com/watch?v=lqThn3C-zg4

[Hieb]

@ThE_MarD

 

Also worth keeping in mind that the estimated wattage is calculated based off of industry standard TDPs rather than actual power consumption. A build that has a max wattage of 500W in PCPartPicker will likely draw 350W at the wall under load (and of course PSUs are measured based on how much they can provide, not how much they can draw from the wall).

 

So a 500W PSU for a 500W build will actually have breathing room.

 

My build has 362W TDP according to PCPartPicker but at the wall it draws 225-250 under load.

[SteveGrabowski]

If it's a good 400W PSU and you're not running an FX-9590 or something with a ridiculous overclock then you should probably be fine. If it's some Raidmax or Diablotek piece of crap that can't actually meet its rated wattage then replace it ASAP. The Antec VP450 and Corsair Builder CX430 are really budget friendly PSU's you might consider if you don't mind rebates.

[Lotus]

400W PSU would be fine if you're running a low (~80W) CPU and not a lot of other things, provided it's ACTUALLY 400W and not some gutless wonder.

[Aphala]

Would go for a 500Watt PSU if you want some breathing room. I recommend Corsair CX 500 around £49.