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Nov 21, 2012
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Hi, first post here cause i've been wracking my head around this.
I'm building my own pc again although last time my power supply came with my motherboard so I didn't need to know/care about it.

But i'm buying a Asrock x79 Extreme x79 socket 2011 7.1 channel motherboard
I emailed them asking if they could tell me what kind of power I need.

I got this back
"About the PSU:
With general PSU that got 24(20)-pin ATX power and 8-pin (8+8 or 4pin only) ATX12V connector,
the system will work."

That's probably very useful, though i'm struggling to understand what different wattage makes, and i'm struggling to rack my head around this 8pin (8+8 or 4pin) is. I use ebuyer for all my gear really. I'm looking for a cheapish one, but i'll be using this system for some very high processing demands, so I would like it to be rather quiet, and reliable.

Help would be great, and if possible even a link to one that would be suitable!
Thanks for reading if you did!


Dedicated TPU Cruncher & Folder
Nov 11, 2008
9,640 (2.87/day)
System Name Dean Machine
Processor Intel 4790K
Motherboard MSI 1150 Gaming mATX
Cooling Corsair H100i and video card custom loop
Memory 16 gigs Crucial Ballistix Tactical Tracer
Video Card(s) Dual liquid cooled HD7970's (Thanks to Norton!!!)
Storage Crucial M4 256 gig SSD
Display(s) Overlord 27" 2560 x 1440
Case Corsair Air 540
Audio Device(s) On board
Power Supply Seasonic modular 850 watt Platinum
Software Windows 10 Pro
First off, welcome to TechPowerUp!!!

Now then, your going to want a good quality power supply. With that said, Corsair is a very quality built PSU.

Here is a very good "modular" power supply from Corsair over at NewEgg.

CORSAIR Professional Series HX650 650W ATX12V v2.2...

That power supply will power most systems that are upper mid built.


Senior Moderator
Staff member
Jul 19, 2006
42,453 (10.11/day)
Processor i7 8700K
Motherboard Asus Maximus Hero X WiFi
Cooling Water
Memory 16GB G.Skill 3200Mhz CL14
Video Card(s) GTX 1080
Storage SSD's
Display(s) Nixeus EDG27
Case Thermaltake Core X5
Audio Device(s) Soundblaster Zx
Power Supply Corsair H1000i
Mouse Zowie EC1-B
List all of the components that you will be placing in the system.
Nov 21, 2012
2 (0.00/day)
Just to say cheers for the warm welcome, quick reply and suggestion! i've heard really good things about corsair and that's a pretty decent price! And I am going to go with a modular one, from what i've read recently, especially at my level, a non modular would be a bit of a headache.

This is everything i'm putting in
Motherboard - Asrock X79 EXTREME9 X79 Socket 2011 7.1 Channel HD...
Processor - Intel Core i7 3820 3.6GHz Socket 2011 10MB L3 Cach...
Graphics card - EVGA GT 640 Single Slot 2GB DDR3 Dual DVI Mini HDM...
Fan - Arctic Cooling Freezer i30 Socket 1155, 1156, 2011...
Memory (32gigs worth) - Kingston 8GB 2400MHz DDR3 Non-ECC CL11 DIMM (Kit o...
Case - Fractal Design Node 605 Case | Ebuyer.com

It's been a while since I built a pc, expecially one so demanding. So if i've gone wrong anywhere, or i've proposed something rather, ill advised please do correct me!
My budget for the pc isn't as big as i'd like, that's why the memory i've chosen is rather cheap. But that's something I can easily upgrade in the future
Aug 16, 2007
7,180 (1.89/day)
600w and upwards should be plenty of wattage and leave room for a "larger" graphics card later down the line. Something like a Corsair TX or HX will supply enough current for that system and i know they are decent, look for the efficiency rating too. If i remember Corsair in the UK make you send your psu to Europe if you need to use the warranty, luckily i bought mine from an e-tailer that deals with returns and that itself.

Depends how much you want to spend really, there's a bunch of other great power supplies.