[veba]

Is a Corsair HX750W PSU enough to power 2 5850's in CrossfireX aswell as 4 HDD and an optical drive and all the other needed stuff in a computer?

 

[Danker16]

yes!

 

[Ocnewb]

Yes it will power everything without a sweat.

 

[manolith]

Is more than enough

 

[meticadpa]

Yep, easily.

The cards by themselves pull less than 150W by themselves whilst at stock clocks, and probaby around 180W overclocked, depending on voltage and clock speeds.

I'm actually going to be getting another HD5850 at some point, on my 650W power supply, so that should give you an indicator of how much headroom you have with the 750W.

Enjoy the cards, they'll be beastly in CrossFire!

http://www.legitreviews.com/article/1097/12/

Yep, less than 500W for stock 5850s with an i7 975 -- a very high-end rig.

 

[linskingdom]

One 5850 max can go around 150w. The 750tx can do 720w/60A on 12v so it should be fine.

 

[Acoma_Andy]

Quote:

Originally Posted by veba Is a Corsair HX750W PSU enough to power 2 5850's in CrossfireX aswell as 4 HDD and an optical drive and all the other needed stuff in a computer?

Easily.

 

[ericeod]

ATI Radeon™ HD 5870 System Requirements

Quote:

PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard 500 Watt or greater power supply with two 75W 6-pin PCI Express® power connectors recommended (600 Watt and four 6-pin connectors for ATI CrossFireX™ technology in dual mode) Certified power supplies are recommended. Refer to http://ati.amd.com/certifiedPSU for a list of Certified products Minimum 1GB of system memory Installation software requires CD-ROM drive DVD playback requires DVD drive Blu-ray™ playback requires Blu-ray drive For an ATI CrossFireX™ system, a second ATI Radeon™ HD 5870 graphics card, an ATI CrossFireX Ready motherboard and one ATI CrossFireX Bridge Interconnect cable per graphics card (included) are required

Yes, and even the 650W PSU in your SIG will be just fine!

 

[sepheroth003]

Easily, the HX series are pro. I read a review on that 750 and they could squeeze up to 900w out of it. Not that you would want to do that, just saying its an amazing psu.

 

[Ocnewb]

Oh ya just notice u have the TX650 in ur sig rig. U don't even need to change to the HX750, just use ur current one and still plenty of room to go.

 

[veba]

Quote:

Originally Posted by ericeod ATI Radeon™ HD 5870 System Requirements Yes, and even the 650W PSU in your SIG will be just fine!

Quote:

Originally Posted by Ocnewb Oh ya just notice u have the TX650 in ur sig rig. U don't even need to change to the HX750, just use ur current one and still plenty of room to go.

Yeah but my Current PSU only have 2 PCI-E connectors

 

[Hey Zeus]

With a dual core? YES

 

[Ocnewb]

Quote:

Originally Posted by veba Yeah but my Current PSU only have 2 PCI-E connectors

U can always get the molex to PCIe cables, and that cable comes with almost every new Cards.

 

[veba]

Quote:

Originally Posted by Ocnewb U can always get the molex to PCIe cables, and that cable comes with almost every new Cards.

I don't really like to rely on those cables since I've heard their not very high quality, so, better safe then sorry

But from what your saying will even my current PSU power 2 5850? So if i get the Corsair HX650W instead of the 750W will it be enough to power the 2 5850s? OR should i get the 750W version, again, better safe then sorry.

 

[Hey Zeus]

Get the biggest you can afford.

 

[veba]

Just read on XFX' website that they recommend a 600W powersupply if you are to run the 5850s in CrossfireX, so I'll be getting the 650W rather then the 750W then.
If someone means i should get the 750W please tell me fast so i won't have to return the PSU and buy a new one!!!!

*EDIT* I just remembered that I've watched a lot of video-reviews from ComputerTV on video-card and he always say that you don't need as much wattage as the videocard companies say you need if you PSU is high quality. I'm buying a Corsair, which he always mention when talking about when he talk about power requirments. Corsair has very high quality PSUs and thats why I'm getting one. and they state, as i've said, on the videocards website that you only need a 600W PSU to run 2 5850s.

 

[DuckieHo]

Quote:

Originally Posted by linskingdom One 5850 max can go around 150w.

That's at stock though.... these things overclock like mad so what is the max max? (I'll try to get some numbers tonight with a Kill-a-Watt).

 

[III-Kill-ZonE-III]

yes you should have no issues at all with the 5850 in CF

 

[mdbsat]

Quote:

Originally Posted by veba I don't really like to rely on those cables since I've heard their not very high quality, so, better safe then sorry But from what your saying will even my current PSU power 2 5850? So if i get the Corsair HX650W instead of the 750W will it be enough to power the 2 5850s? OR should i get the 750W version, again, better safe then sorry.

I am using the 750W and it is PLENTY. If you can get it go for it

 

[meticadpa]

Quote:

Originally Posted by veba Yeah but my Current PSU only have 2 PCI-E connectors

Quote:

Originally Posted by veba Just read on XFX' website that they recommend a 600W powersupply if you are to run the 5850s in CrossfireX, so I'll be getting the 650W rather then the 750W then. If someone means i should get the 750W please tell me fast so i won't have to return the PSU and buy a new one!!!!

Get the Antec TruePower New 750W instead. It's a great PSU, much better than the HX650 from Corsair, but not quite as good as the HX750.

Also, it's much, much cheaper.

Quote:

Originally Posted by DuckieHo That's at stock though.... these things overclock like mad so what is the max max? (I'll try to get some numbers tonight with a Kill-a-Watt).

It'll depend on clock speed, and voltage, obviously.

My estimates of a fairly average overclock (1000MHz on the core, 1300MHz on the memory with 1.3V) are 185W.