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Corsair HX850 enough?

Last response: in Systems
January 24, 2011 6:48:13 PM

Hello informative people of Tomshardware

I'll start by listing my PC components

Corsair Obsidian 800D
Corsair HX850
Core i7 920 @ 4.3Ghz 1.360V
POV GTX570 Beast Ed. @ 950/1900/2200 1.2V X2 (Second one hasn't arrived yet)
3 x 1GB OCZ 1333Mhz 8-8-8-24 Running at 1230Mhz 6-7-6-18 1.68V
Sammy Spinpoint F3 500GB (Plan on buying an SSD soon)
10 Case fans all 12V
Gigabyte GA-EX58-UD5
A Cold cathode
A 18W Pump
A 10W Pump
DVD Drive
Blu Ray drive
Mouse, keyboard, Headset.

So is my 850W PSU good enough ? :heink: 

More about : corsair hx850

a b B Homebuilt system
January 24, 2011 6:51:24 PM


January 24, 2011 6:54:01 PM

Care to elaborate further?
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a b B Homebuilt system
January 24, 2011 6:59:37 PM

To me it seems like a stupid question, of course it will be able to power your build. No offense mate.

Edit: the one 'problem' you might have is needing to daisy chain some of your fans, as the Corsair HX850 has twelve 4-pin peripheral (molex) connectors, to me it looks like you'd need 13, but daisy chaining is easy and not really a problem at all.
January 24, 2011 7:04:53 PM

Well I figured a stock 570 eats about 215W, so an overvolted card would eat 250W roughly, times that by 2 = 500W, Plus a highly overclocked CPU = 200W roughly. So thats 700W
+ Mobo, RAM, HDD, Fans, Pumps.... thats surely another 150-200W which gives a total of 850-900W max load.

Its an expensive rig, so to me its not a stupid question.
a b B Homebuilt system
January 24, 2011 7:08:38 PM

That's on full load, so you'd have to be stress/torture testing on both the CPU and GPU to get anywhere near that and you'd have to be doing it 24/7 to start to have problems with something as high quality as that Corsair.
January 24, 2011 7:13:05 PM

I wouldn't want to push my PSU too hard, a CPU intensive game could push the load to 800W+ I know the corsair HX850 is high quality but it'll be very close to its limits in some situations.
a b B Homebuilt system
January 24, 2011 7:15:33 PM

Yes, it should be ok. The GTX570's in SLI, will draw ~400-415 watts at full load. You've obviously OC'd the CPU, but even on load, the i7 920 is relatively power efficient.

You shouldn't have a problem.
January 24, 2011 7:15:55 PM

Yes, but it says in that review

"800+ to a KiloWatt is recommended if you plan on any overclocking" I have heavy overclocks.
a b B Homebuilt system
January 24, 2011 7:21:04 PM

Personally, I don't like to cut it that close.

But, before I just decide to upgrade the PSU, I think I'd try it with my current PSU.

The PSU wattage doesn't matter all that much. There's a vast difference in how PSU's are rated. Some can meet their claims, some can't. This is why I believe most recommendations on PSU wattage are overestimated a touch.
a b B Homebuilt system
January 24, 2011 7:21:55 PM

I have a feeling they are covering their asses in a similar fashion to AMD and Nvidia when they make PSU recommendations.

Best solution

a b B Homebuilt system
January 24, 2011 7:25:00 PM

The HX850 is very conservatively rated, its stronger than many 1kW units on the market, its more powerful than the Antec CP-1000 unit, so the wattage rating on the unit doesnt mean much. That Guru3d review has the power measured at the wall, and has 2 GTX 570s pulling 410W from the wall which on an 85% efficient unit is about 350W from the PSU which seems about right.

The HX 850 is a very strong unit for an 850W unit and will be plenty for that system, hardware secrets was able to pull 1000W from it with it staying above 80% efficiency and in spec before it shut down, you have plenty of power available.
a b B Homebuilt system
January 24, 2011 7:37:34 PM

The HX850 is rated for 850W of continuous power, so if your system needs 800W all the time, it'll give it to you ;) 

I'm thinking about either the HX850 or AX850 if I get a third GTX 470, but that won't be for a while :( 
January 24, 2011 7:54:37 PM

Thanks for all the help, seems as though the HX850 is underrated, and could have been a 1000W 80+ PSU. :) 
a b B Homebuilt system
January 24, 2011 8:50:35 PM

Seeing as 850W is 85% of 1000W.... :D 
January 24, 2011 8:56:35 PM

boiler1990 said:
Seeing as 850W is 85% of 1000W.... :D 

Yeah yeah yeah.... you know what I meen :lol:  :kaola: 
January 24, 2011 8:58:39 PM

Did a mod change this to a question rather than a discussion?, Could have sworn those "Slelect as best answer" buttons weren't there before...

Maybe I'm going loopy.
January 24, 2011 9:30:56 PM

Best answer selected by omgitzfatal.
a b B Homebuilt system
January 24, 2011 11:13:47 PM

It was my magic cape. :)