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Will a 750W power supply power this system, or should I go with 850W?

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  • Powersupply
  • Components
  • Power
Last response: in Components
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September 25, 2013 7:35:32 AM

Okay first my PC specs and why I am worried about the power requirements.

Asus X79 Deluxe LGA 2011
Intel Core i7-4820K Ivy Bridge-E (130W)
G.SKILL Ripjaws X Series 16GB (4 x 4GB) DDR3 1600
CORSAIR Hydro Series H100i Water Cooler
5-6x120mm fans (3 of them will be on a low noise circuit)
EVGA ACX Cooler 03G-P4-2784-KR GeForce GTX 780 3GB (i've seen it run on 550W gold systems)
SAMSUNG 840 Pro Series MZ-7PD128BW 128gb (for boot of course)
3x 1tb 3.5" sata3 drives, they are black WD, and seagates, no green's here
2x 500gb 3.5" sata2 drives
LG UH12NS30 3D Blu-Ray player (yes I use optical sometimes)


Misc:
3d Nvidia vision 2
ASUS VG Series VG278HE 27" 144hz / 3D
NZXT 810 Switch case

As you can see I am a bit of a storage freak, and I do not intend on replacing these with single larger drives for several months. The video card is quite power hungry, as well as the CPU. I also use a minimum of 6 USB2.0 devices at any given time (currently no 3.0), and a dual drive thermaltake eSATA hotswapper on occasion. I am not running any internal lighting, additional pumps, fan controllers, etc.

I only intend a mild overclock of the CPU and memory, no GPU overclock beyond factory superclock. This is for gaming/workstation needs. I only occasionally run intensive applications like video editing/transcoding. I am a multi-tasker but it is mainly 10 browser tabs + a game, skype, winamp, 3D/HD movie watching.

With all of the above in mind could I go with a:
CORSAIR RM Series RM750 GOLD fully modular http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Or would I need a bit more power and run a 850W GOLD of the same model and brand?
CORSAIR RM Series RM850
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

I do not expect my power requirements to go up. I am not going to ever SLI this system, raise the voltage on the CPU, GPU, or use more than 1-2 USB 3.0 devices in the foreseeable future. Any insights into this would be greatly appreciated, as my needs are a little more unique than I could find on the forums and it is because of this forum that I decided to go with a IVY-E instead of Haswell for my needs.

More about : 750w power supply power system 850w

September 25, 2013 11:04:33 AM

I am aware of what the card requires, however, I am not sure what effect all of the hard drives, a mild overclock, all of my usb devices, and a optical drive will have ontop of the high wattage of the CPU I chose and video card. I have since used some PSU calculators, however, they are not very convincing as they are missing components I have here and there. Most of the other systems similar to mine tend to have far fewer hard drives, and I know they aren't exactly power savers. I do not run a server, however, so they won't all be going at the same time.
Related resources
September 25, 2013 11:48:57 AM

alexoiu said:
In that review, the entire system consumption under load is 340W. Use
http://www.buildcomputers.net/power-consumption-of-pc-c... for other components. 750W for single GPU is more than enough for all systems. If SLI or Crossfire, things change.


That second link was very helpful, thank you very much.
!