Is this PSU better for 3 x GTX 260 .....?

[kayawish24]

hello........!

i am want to ungrade my power supply to Chieftec CFT-1200G-DF 1200 Watt...but i dont know that the +12v rails be enough to run my Overcloked i7 950 @ 4Ghz and OC 3 x GTX 260 Core 216 3 way SLI.the specs of PSU in which i am intrested is..
Energy Efficient 80 PLUS Certified

80 PLUS Certified
Efficency > 80%
+3,3V 30 A
+5Vsb 6 A
+5V 30 A
+12V1 20 A
+12V2 20 A
+12V3 25 A
+12V4 25 A
+12V Total 90 A
-12V 0,8 A
more is here: http://www.newegg.com/Product/Product.aspx?Item=N82E16817202018

my curent system is:-

CPU: Intel Core i7 950 @ 4GHz 1.36v 24/7 * prime95 stable *
Cpu Cooler: Thermaright 120 ULTRA Xtreme with 2 Fans
Board: ASUS P6t6 Revolution
Mem: 6GB Triple Channel DDR3 Corsair XMS3 1600MHz 8-8-8-24
GPU: Nvidia 3 x XFX GTX 260 Core 216 3-WAY SLI @ 715/1270/1431 (Core/Memory/Shader)
HDD: 640GB S-ATA Seagate Baracuda 32 Mb Cache 7200 Rpm
Sound: SoundMAX Full HD 7.1 Channel
OS: Windows Vista Ultimate SP1 x64 *Activated*
PSU: CORSAIR TX-850 Watts
Monitor: View Sonic 24" VA2413wm LCD

i dont think that my curent PSU corsair 850 watts can handle my curent setup....please help me.

 

[Fitseries3]

get a pc power 860watter. i used one on almost he same setup.

i also reccomend enermax psus. 850 or so is good for what you have.

 

[kayawish24]

what you mean by pc power 860watter?

 

[Fitseries3]

pc power and cooling 860watt psu.

newegg is out of stock on the 860 but the 910 is a tad more wattage...

http://www.newegg.com/Product/Product.aspx?Item=N82E16817703022

 

[livehard]

pc power and cooling 860watt psu.

newegg is out of stock on the 860 but the 910 is a tad more wattage...

http://www.newegg.com/Product/Product.aspx?Item=N82E16817703022

I second that.

 

[El Fiendo]

As an interesting note, you can get a modular one (Corsair 850HX) for $5 more than the PCP&C 910 and it comes with the same 6 x PCI-E connectors. I believe Corsair is just as good as PCP&C, the only thing being that PCP&C is more than likely a single rail while the Corsair is likely multi rail.

Now I don't think your 850TX will have a problem aside from the fact that its only got 4 x PCI-E connectors. I'm currently using a PCP&C 750 to power 2x GTX260s and an OC'ed Q9450. I know your rig will draw more power but I've heard of people using the PCP&C 750 to power Tri SLi systems via molex to PCI-E adapters, albeit with a Core 2 Quad or Duo, not i7.

If you're worried about it, you can step up to the PCP&C 910 but I don't think that's really giving you much more headroom than what you already have. I may be entirely wrong on all of this though. I'm interested in replies to this thread as well because I was looking to get the 850HXs for my own Tri SLi rig making.

 

[Fitseries3]

yup... i've run tri sli 260's heavily OCed on my pc power 750 just fine. had all 3 cards running 780mhz gpu core

 

[livehard]

As an interesting note, you can get a modular one (Corsair 850HX) for $5 more than the PCP&C 910 and it comes with the same 6 x PCI-E connectors. I believe Corsair is just as good as PCP&C, the only thing being that PCP&C is more than likely a single rail while the Corsair is likely multi rail.

Now I don't think your 850TX will have a problem aside from the fact that its only got 4 x PCI-E connectors. I'm currently using a PCP&C 750 to power 2x GTX260s and an OC'ed Q9450. I know your rig will draw more power but I've heard of people using the PCP&C 750 to power Tri SLi systems via molex to PCI-E adapters, albeit with a Core 2 Quad or Duo, not i7.

If you're worried about it, you can step up to the PCP&C 910 but I don't think that's really giving you much more headroom than what you already have. I may be entirely wrong on all of this though. I'm interested in replies to this thread as well because I was looking to get the 850HXs for my own Tri SLi rig making.

I usually use Corsair myself, I'd just like to note that the HX series of Corsair typically has multiple rails and are modular, while the TX series is usually single railed and not modular.

 

[El Fiendo]

Yes, I figured that would be the case on the HX being multi-railed. I couldn't remember the TX was or not though.

At any rate, multi rail and single rail actually isn't all that different. Multi rail will still supply you same power output, its just broken up across multiple connector lines. In total they can offer a theoretical that's higher than what the actual box outputs, but most users (99% I'd say) will not load down every connector. The only time I think single rails should be considered over multi rails is if you're an extreme OC'er and you're maxing out everything on the bench (or if your personal preferences apply). Even then most people have enough PSU overkill to not need to worry about this. Most of the time both units will net you the same result though.

 

[livehard]

Yup. I didn't mean to be nitpicky, just putting it out there. I prefer to use single rails. Just simpler for me; I don't have to make sure I'm putting video cards on the right rail. Guess I'm just simple minded.

 

[ShiBDiB]

wouldnt it be cheaper to get 1x 295 and a smaller psu? and get better fps

 

[Homeless]

wouldnt it be cheaper to get 1x 295 and a smaller psu? and get better fps

In theory the 3x260 would be faster, but SLI scaling limits performance regardless at the number of video cards. So in theory a 295 (2x275) could be a similar speed of 3x260

 

[El Fiendo]

I'd rather fold on 3 x GTX 260 than 2 x GTX 295, but that's my use for my graphics cards so he may have his own reasons. Besides, its cheaper for him to just pick up another GTX 260 as opposed to selling two off for roughly 150 USD (shipped). He'd still need more money to buy them new and still a little extra to buy them used.

 

[Reventon]

A 1200w is usually unnecessary. Many people buy PSU's that supply 1000w+, but in reality even th most high end rigs peak at only 900w or so.

 

[kayawish24]

what if i go for 3 x gtx 280......will my tx-850 work on that

 

[Fitseries3]

yep.

 

[kayawish24]

what yep...........you think tx-850 will take the load of 3 x gtx 280s

 

[Fitseries3]

YES.

i have 2x295s and i ran them on a 750watt pc power and cooling psu with a i7 running 4.4ghz.

 

[kayawish24]

but 3 x gtx 280 will take more power then 2 x gtx 295...or not ?

 

[kayawish24]

you have 1050 watt PSU

 

[Fitseries3]

i used to run 3x260s on the same psu.

yes... i have many psu's.

 

[mlee49]

yup... i've run tri sli 260's heavily OCed on my pc power 750 just fine. had all 3 cards running 780mhz gpu core

Really???? I wonder if my corsair 750 could handle three 260's? Better yet, tri 275's?

 

[PaulieG]

Really???? I wonder if my corsair 750 could handle three 260's? Better yet, tri 275's?

The 750 is pushing it, and may decrease the life of the PSU. However, the 850TX will handle this setup just fine, and more than likely provide more stable pwer than the Chieftec, despite the higher wattage.

 

[kayawish24]

i am intrested in this 1200 watts PSU for 3 x gtx 280s.............what do you say?

http://www.thermaltake.com/product/power/toughpower/w0156/w0156.asp

 

[kayawish24]

hello