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Is this PSU too much wattage and should I choose Hybrid or Modular?

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November 4, 2013 3:07:31 PM

I am thinking about adding a 950W PSU to to power all of this, I did a calculator considering dual GPUs and adding lots of potential extras and it came out as 883W, so i rounded up to 950W.
My main 2 questions are:

1. Is 950W a problem (too powerful and will melt everything if I only use 700W to begin with/ increadeably expensive or something funny like that)?
2. Should I get a hybrid or modular PSU?

I am planning a fresh build and here are the components I have selected so far:
CASE: Obsidian 750D
MOBO: ASRock 990FX Extreme9
GPU: AMD HD 9790 GHz DD Edition
CPU: AMD FX-8350
RAM: 16GB kit (8GBx2) which I may double later on, Ballistix 240-pin DIMM, DDR3 PC3-14900 memory module

Here are links to all the components I have selected if you are curious or just want to check something.
CASE: http://www.corsair.com/en/pc-cases/obsidian-series-pc-c...
MOBO: http://motherboard.findthebest.com/l/656/ASRock-990FX-E...
GPU: http://www.newegg.com/Product/Product.aspx?Item=N82E168...
CPU: http://www.amd.com/US/PRODUCTS/DESKTOP/PROCESSORS/AMDFX...
RAM: http://www.crucial.com/uk/store/mpartspecs.aspx?mtbpoid...
November 4, 2013 3:14:20 PM

There is no such thing as too much power, in that the components will only draw as much power as they need. Nothing will happen if you use too powerful a power supply.

A modular power supply is good for cable management, since you would only plug in the cables you needed. It's a matter of preference as to whether you get a modular power supply or not.

Casey
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November 4, 2013 3:16:08 PM

You'll only have to worry about something melting if you're buying a cheap, poorly made, low quality PSU. I would go with a modular PSU cable management is a whole lot easier.

That being said, I'm no expert on AMD products, but from what I've read on the forums, a 8350 pulls around 300w, and the 7970 would probably be around 300-350w. If you get a reputable brand with say... 850w, you should be ok.
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November 4, 2013 3:32:13 PM

Your PSU should match the maximum amount that your system will draw, plus a moderate buffer.

Although nothing bad will happen to your system by using a PSU having excessive capacity, when your system draws less power (when idling, for example) an over-capacity PSU operates less efficiently, wasting energy, and generating dis-proportionately more heat than is necessary. The bigger PSU probably costs more too.

This article is a little dated, but the information is still relevant.
http://www.tomshardware.com/reviews/power-supply-psu-re...
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Best solution

November 4, 2013 3:52:00 PM

enemy1g said:
...
That being said, I'm no expert on AMD products, but from what I've read on the forums, a 8350 pulls around 300w, and the 7970 would probably be around 300-350w. If you get a reputable brand with say... 850w, you should be ok.


The 8350 has a TDP of 125W, the 7970, 250W another 100W for the motherboard and peripherals (being very generous with headroom). I wouldn't think more than 650W would be needed. Something like the XFX Core Edition PRO650W should perform nicely I would think
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