Need a psu that works for my GPU

corpe4 · Dec 11, 2013

I have a FX-8320 And I am getting a R9 290 it says it needs a

750 Watt Power Supply is required.
1x75 Watt 6-pin PCI Express power connector is required.
1x150 Watt 8-pin PCI Express power connector is required.

I know 750w is not required but I am planning on overclockkng.

Budget: Under $100
Was looking at this not sure if compatible:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817152047

techneutral · Dec 11, 2013

If you don't overclock your CPU, it's gonna bottleneck the R9 290. 700 watts is more than enough, the rest is kind of an overkill, except if you're planning on SLI

VincentP · Dec 11, 2013

250W video card
125W CPU
System power up to 400W at load.
You want to run the PSU at about 60% load or less, so a 750W power supply is about right.
The specifications on the supply you have chosen are fine for this system.
You might want to check reviews on the brand and this specific unit if you can just to see if other people have had trouble with them.

LouieG02 · Dec 11, 2013

dude, i really dont think that cpu will bottleneck the card....

markwp · Dec 11, 2013

While the raidmax you listed is "compatible", a solid 650 like THIS or THIS would be perfect for a single 290. If you plan to xfire later, add 250w.

Mark

corpe4 · Dec 11, 2013

So will my cpu bottleneck my gpu?

LouieG02 · Dec 11, 2013

dude i wouldnt think so.... i really doubt it.

VincentP · Dec 11, 2013

corpe4 :

No, it will be fine.

If you look at the CPU benchmarks for most games they turn the graphics settings down on a high end graphics card and measure frames per second.
Once you hit the refresh rate of your monitor, there is no point rendering more frames per second.
People overclock high end CPUs and are happy that they can render 150 frames per second, but you can only display 60 anyway.

Graphics cards are a bit different because you can increase the graphics settings with a better card and still get the same frame rate.
Detail settings generally don't affect CPU performance.

With your current setup, run the games you are interested in and measure CPU usage with perfmon.
Turn the graphics settings down to increase the frame rate, the CPU usage should increase as frames per second increase.
When you get to your target frame rate, look at the CPU usage.
When you install the new graphics card, you will find you can get to the same number of frames per second with much higher graphics settings.
The CPU usage will be the same as on the existing system with the same frame rate.
I'd be surprised if you can push that CPU past 50% in games.

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Need a psu that works for my GPU

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LouieG02

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LouieG02

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