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How many watts do I need for my build?

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  • Power Supplies
  • Components
Last response: in Components
July 28, 2014 12:00:08 PM

So I've put together this Gaming computer from scratch using reviews and such on Newegg.com.
These are the parts that I'm planning on going with and have no idea how many watts they consume or need. The power supply is the only thing that has me stumped. I've used several different calculators and all range from 650w - 1050w. (If you happen to have any suggestions I would be happy to hear them. I don't know a ton about PC gaming builds.

Motherboard: (Is this MOBO too big?)
ASUS Crosshair V Formula-Z AM3+ AMD 990FX + SB950 SATA 6Gb/s USB 3.0 ATX AMD Gaming Motherboard with 3-Way SLI/CrossFireX Support and UEFI BIOS

Processor:
AMD FX 8350 Black Edition

Video Card:
2x PNY XLR8 Geforce GTX 770 CG - 2GB - GDDR5 SDRAM

Hard Drive:
WD VelociRaptor 500GB 10000 RPM 64MB Cache Sata 6.0Gb/3.5"

Chassis: (I chose a full case. would a Mid case work with the size of the MOBO?)
Corsair Graphite series 760T w/ 2x 140mm red LED fans

Cooling:
Corsair Hydro Series H105 extreme performance 240mm Liquid CPU cooler

Memory:
2x packs -
G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9D-4GBRL

More about : watts build

July 28, 2014 12:07:21 PM

1200 watts would be enough :v
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July 28, 2014 12:07:29 PM

I think that 800-850W will be plenty enough...
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July 28, 2014 12:14:36 PM

What is the benefit of over clocking? To be honest I don't even know how to do it.
A better questions would be do I need to overclock it?

Is the Case over sized?

I don't want to have too much power. I would like to get it with in 100w of the actual power use if possible.
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a b ) Power supply
July 28, 2014 12:19:24 PM

Overclocking the CPU gives better performance from the CPU which helps to get better frames in more cpu intensive games, or if there is a cpu bottleneck.

If you don't know how to do it, and you want to, just read some articles online or something, or if you're happy with your setup, then don't worry much about overclocking.
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July 28, 2014 12:20:06 PM

Dude, get at least 1000 watts. I have two 270x, and the xfx 750 watt PSU burnt up with my CFX setup. I also have the 8350. Don't buy one only to buy another like I did. Do it right the first time. Also, at 750/800 watt, your PSU will be working full time all the time. I upgraded to the 1300 EVGA supernova and now the PSU barely get warm.
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a c 265 ) Power supply
July 28, 2014 12:25:52 PM

PSU requirements are almost entirely determined by the graphics configuration. This handy chart suggests 850w:
http://www.realhardtechx.com/index_archivos/Page362.htm
I have no problem overprovisioning a PSU a bit. Say 20%.
It will run cooler, quieter, and more efficiently in the middle third of it's range.
A PSU will only use the wattage demanded of it, regardless of it's max capability.

I have a few suggestions:

Velociraptor was good in it's time, but not today.
Use a SSD instead. a 240gb Samsung evo would be good. Use a conventional hard drive for expansion or storage later if you need to.

You are currently budgeting about $500 for a cpu/motherboard/cooler.
I suggest that for less, you can get a i7-4790K $340, Z97 sli motherboard for $125 http://www.newegg.com/Product/Product.aspx?Item=N82E168...
And a superb air cooler for $65 http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Those parts even at stock will outperform a highly overclocked FX-8350 and be quieter in the process.
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July 28, 2014 1:23:19 PM

I don't think I'll ever over clock. If I need to I'm sure I could just swap out the power supply. So 850w. Thx for the help. However. I still don't know if the full tower is really needed. should I get a mid tower and hope everything fits? one review I read said that this MOBO tends to be big.
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a c 5573 ) Power supply
July 28, 2014 1:24:18 PM

I like the room in FULL towers.
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