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Need help on choosing my power supply unit


New Member
Jan 13, 2013
10 (0.01/day)
I'm building a new pc. Some parts I already have (they are marked with *), other parts are still open for discussion (like the graphics card, but I posted that on the graphics card section). At a certain moment buying parts I came across a great deal on the Corsair Gold AX850 pro. I did a fast calculation on http://www.extreme.outervision.com/PSUEngine and felt I couldn't let this psu go out of my hands. But now I have a clearer view on what my pc will be and I was wondering if the AX850 will still do the job. The box is still sealed so I could probably sell it for the price I bought it and then buy myself a Corsair Gold AX1200. I know that's way too much power for what I need but there isn't a 1000W model in that Gold AX pro range from Corsair and one thing I am sure of is that I want a Gold AX pro model from Corsair.

So will the AX850 do the job?

My intention is: video editing (probably with pinnacle), blu ray burning and playback, gaming like Crysis 2, Diablo III and Black Ops 2. I give you a list of my speqs. Some more facts that I can give: I think the pc will be on for an average of 8 hours a day and I want to use my system 4 years without problems. I have the ambition to overclock (see further). I do not have the ambition to put graphic cards in SLI.


Cooler Master HAF X (standard 4 fans and probably upgrade it with an extra red LED top fan)
ASUS Sabertooth X79
*Intel i7-3930k (c2) (possible I will overclock, but not extremely, 4.0-4.2 @ 1.5v, if achievable with given speqs, I don't want to take it to an extra level (read custom water cooling) )
Corsair H100i (comes with 2 fans, probably add 2 more red led fans to have a push-pull configuration)
*Corsair Vengeance Quad Channel Memory DDR3 16gb (4x4) 1866 C9 (9-10-9-27)
Samsung 840 Pro 128gb SSD (if sufficient for system and applicatons, otherwise 256 model?)
Crucial M4 512gb SSD (for 'My documents')
* IDE drive 7200 RMP 512gb from my old system that I will use as auto-backup
LG BH10LS38 blu-ray burner
* DELL UltraSharp U2711b (= 27" WQHD 2560x1600)
GTX 670 or 680 (4GB from ASUS or EVGA) or HD7970 (3GB brand???)
* TV tuner from my old system
* Windows 7 Ultimate and Office 2010 Home and Student


New Member
Apr 7, 2009
241 (0.08/day)
Perth, Australia
System Name SexMachine
Processor Intel i5 750 @ 4Ghz 1.29v
Motherboard Asus P7P55D Deluxe
Cooling Prolimatech Mega Shadow
Memory Corsair CM3X2G1600C9DHX 4GBs @ 800Mhz @ 9-9-9-24
Video Card(s) VTx3d 6950 Modded +200 900mhz/1375mhz
Storage 120GB Corsiar Force 3, 2 1TBs, 6 1.5TBs, 3 2TBs
Display(s) BenQ XL2410T & Samsung SyncMaster 2693HM + Dell U2410
Case Lian Li PC-A70FB Black
Audio Device(s) Asus Xonar Essence ST
Software Microsoft Windows 7 Ultimate 64bit
Benchmark Scores Benchmark ALL THE THINGS
AX850 will do fine. depending on how you want to spend etc a 750w would do the job very easily aswell, as long as its at least bronze. do you plan on adding anything else to the system later? eg crossfire/sli gfx cards.

PS: Sabertooth X79 doesn't have an IDE slot


New Member
Jan 13, 2013
10 (0.01/day)
It's not really my intention to SLI or Crossfire although I'm not excluding it. If it would be the case than it would be for exemple in 2 years from now, if I can still get the same graphics card on ebay for exemple, than I might consider it since it will be much less money than and at that moment it might power up my system a bit. Furthermore I don't think of adding much more.

It's a regular hard disk from my old system, thought that was IDE. How would I connect it than? It could me something else (SATA?), I don't know, I would have to dig for that...

Black Panther

Senior Moderator™
Staff member
May 30, 2007
8,962 (2.30/day)
System Name Great White Bengal
Processor i7 930 @ 4.2Ghz
Motherboard Gigabyte GA-X58A-UD3R
Cooling Scythe Yasya
Memory 12GB (3 x 4GB DDR3 Geil Black Dragon)
Video Card(s) EVGA 1070Ti SC Black Edition 8GB
Storage eSata Seagate 2TB -- 240GB SSD Sandisk Extreme
Display(s) 27" 2560x1440 Dell U2711
Case NZXT Switch 810 White
Audio Device(s) Onboard sound & Z5500 Speakers
Power Supply Corsair 850W Gold
Mouse Asus ROG Sica
Keyboard Motospeed
Software Windows 10
If your hard disk is IDE you can't connect it to that motherboard directly. You'd need to buy an IDE to SATA converter card. I heard they're very cheap..


Pro Indian Modder
Jun 13, 2010
8,203 (2.95/day)
System Name la de da... | Samsung NP355V5C-S05IN
Processor FX 8320 | AMD A8-4500
Motherboard ASRock 990FX Extreme 4 | Samsung something something
Cooling CM Hyper 212 EVO push:pull+ 1 panaflow 113CFM + 2 x 120mm NZXTs | Coolermaster Notepal
Memory 2x4GB DDR3 Corsair Vengeance 1600MHz CL9 | Samsunng 4GB + 2GB DDR3 1600MHz
Video Card(s) AMD 7790 GHZ edition! | 7670M + 7640G
Storage 1TB WD10EZEX | W.D 500GB Green AADS | Samsung 1TB
Display(s) dell S2240l 1080p IPS 21.5" | Samsung antiglare 15.6"
Case NZXT Guardian 921RB(@home) and Antec ASK4000B U3(Current)
Audio Device(s) Realtek ALC892 with THX True Studio | Realtek something
Power Supply Corsair GS600 | 90W Brick, 6 cell 48000mAh battery
Mouse Logitech G400, GOD TIER MOUSE!! LOGitech F310 gamepad!
Keyboard Logitech K200
Software Windows 8.1 x64 | Windows 8.1 x64
Benchmark Scores real men do bench presses not bench marks.
600w would be enough for you. the AX850 is overkill.


Addicted to Bacon and StarCrunches!!!
Sep 6, 2009
19,527 (6.38/day)
Chatsworth, GA
System Name The StarCrunch Defender! | X58 Cruncher!
Processor I7 6700K @ STOCK | Intel I7-920
Motherboard Gigabyte Z170X-UD5 | Alienware MS-7543 X58
Cooling Corsair A70 Push/Pull | Corsair H50
Memory Crucial Ballistix DDR4 2400 MHz | Pereema 3x2GB DDR3
Video Card(s) Gigabyte Gaming G1 GTX 1070 | Gigabyte 7970 3GB
Storage 2x Samsung Pro 256GB M.2 SSD's in Raid 0 | 4TB Western Digital SATA drive
Display(s) ViewSonic VG2227wm 1080P | OLD viewsonics
Case NZXT Tempest 410 Elite | NZXT Source 210
Audio Device(s) Onboard
Power Supply Corsair 750TX | Enermax Liberty 500W
Mouse MX518 | MX502
Keyboard TESORO Mechanical | ANZO Mechanical
Software Windows 10 Pro on both
600w would be enough for you. the AX850 is overkill.
DDD, you have to realize that SB-E is 130W stock so any OCing plus a GTX 680 and the rest of the stuff maybe more wattage than you think. AX850 would be more comfortable especially if he decides to SLI later.
Nov 29, 2011
5,975 (2.66/day)
Hi! I'm from the Internet
System Name Selene / Yoda
Processor Fx 8350 @ 4.4 / Phenom II x6 1090t @ 3.6
Motherboard Gigabyte 990FXA-UD3 r4.0 / Gigabyte 890XA-UD3
Cooling H100i / Xig Dark Knight
Memory 4x 8gb G.Skill Snipers / 4x 4gb G.Skill Ares
Video Card(s) Gigabyte R9 290x / XfX DD & VisionTek HD6850's C'fired
Storage 256gb ssd, 2x 2tb Wd Blacks & 1x 1tb Wd black / 1x 1tb
Display(s) Dell Ultra Sharp 2408 WFp / Hp w2207
Case Raidmax Vampire / Chieftec Alum. Dragon Blue
Audio Device(s) Onboard Hd Audio / Onboard Hd Audio
Power Supply Corsair TX 850 watt / Corsair TX 750 watt
Mouse Logitech G500s
Keyboard Corsair Strafe
Software Win 10 pro / Win Vista Home prem. 64 bit
Benchmark Scores What are benchmarks anyway?
Also the corsair unit is a very good unit. What ever psu you get make sure it is of good quality and has a strong 12v rail. I just fried a cheapie 600 watt unit in a Phenom II rig running a gtx 280 because it had a weak 12v rail. I have a 700 watt decent unit in it now and a Corsair TX 650 on the way for it. Just make sure you have amps on the 12v rail for your rig.


Resident Wat-man
Jan 28, 2012
10,527 (4.82/day)
Concord, NH
System Name Kratos
Processor Intel Core i7 3930k @ 4.2Ghz
Motherboard ASUS P9X79 Deluxe
Cooling Zalman CPNS9900MAX 130mm
Memory G.Skill DDR3-2133, 16gb (4x4gb) @ 9-11-10-28-108-1T 1.65v
Video Card(s) MSI AMD Radeon R9 390 GAMING 8GB @ PCI-E 3.0
Storage 2x120Gb SATA3 Corsair Force GT Raid-0, 4x1Tb RAID-5, 1x500GB
Display(s) 1x LG 27UD69P (4k), 2x Dell S2340M (1080p)
Case Antec 1200
Audio Device(s) Onboard Realtek® ALC898 8-Channel High Definition Audio
Power Supply Seasonic 1000-watt 80 PLUS Platinum
Mouse Logitech G602
Keyboard Rosewill RK-9100
Software Ubuntu 17.10
Benchmark Scores Benchmarks aren't everything.
If your hard disk is IDE you can't connect it to that motherboard directly. You'd need to buy an IDE to SATA converter card. I heard they're very cheap..
IDE drives are also terribly slow. If you have the money, get a new drive, preferably one that has 1TB platters if you're looking for decent speeds.