Is this PSU enough for SLI?

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1

Chieftec A85 650w silver paired with GTX 660ti OC 2X?

2

No

3

I recomend an 850watt, gives you a little overclocking room and it won't go much past 80% load.

4

It's not advised. I would recommend a 750w PSU similar to this maybe > http://www.newegg.com/Product/Product.aspx?Item=N82E16817151107

 

5

Maybe, most likely yes, but I would get a 750W. Don't consider any more than that; most people have no idea what the hell they're talking about when it comes to power consumption.

6

Hmmmmm What is the worst case scenario if this psu isnt enough but i still go along and conect the second card?

7

The worst case is it works but the psu overheats and explodes but most likely the 2nd graphics card would just not be powered...

8

I've had two 670's run off a high-end 650w PSU before with everything working fine but I would still recommend a 750w.

9

It would run and work, but it won't have any room at load... it will be most of the time around 80% or even more, I wouldn't recommend doing it, if the PSU isn't able to deliver such power when the cards are at full load, you could fry the system.

10

Any advice on a 850w PSU thats not that expensive?

11

What's your budget?

12

you can do it off a 650w 660ti's are power effecient enough but its always advised u calculate the power draw and add +100w for power fluctuations. I would just pick up a 750w

13

its minimum is 450watt power supply, and a 2nd gpu won't draw another 200w

14

http://pcpartpicker.com/p/ShVs

very likely it would be enough.

I wouldn't advise it though get a 750W

15

150 euros

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[email protected] GPU: Gigabyte GTX660ti 3GB OC RAM: G-Skill SNIPER 16GB DDR3 1600Mghz  HDD: SATA 300GB OD: LG super multi dvd rw OS: Windows 7 64Bit Ultimate Cooling: Zahlman CNPS14X + 2 ventilators

+ another card


I think my oc-ed CPU draws at full load 350-370w so that could be a problem?

17

I tried several calculators but they give me conflicting results.

18

I agree get a 750w as you might get power spikes and that should be more than enough, 650 is too low with that processor.

19

I couldn find some good 750w and there where no 850w ones in my country.

But i found this and i would be interested if this is a good price? 200 euros?

http://www.guru3d.com/articles_pages/cooler_master_silent_pro_m2_1000w_psu_review,1.html

20

You don't need an 850W; you just need a good 650W to 750W. What you have now is.... crap. Get a good Lepa G650, Seasonic X 650, Corsair HX650, Rosewill Capstone 650 M, or Silverstone Strider Gold Evolution 650W, and you're fine.