PSU Wattage Recommendations

[LiamWolf]

Building a new gaming PC. I've never done this from the ground up. I've been reading much but cannot find an answer I'm comfortable with so I figured I should ask here.

Need to know how much wattage I may need. What's overkill and what's unsafe?

I may OC in the future if I feel comfortable doing so. Looking to make use of the SLi as well.

Core i7 920 2.66
Cooler Master V8
EVGA x58
6gb Corsair Memory
EVGA Geforce GTX 285 Standard
Western Digital Caviar Black SE16 HDD
LG BD/DVD Burner
Antec 1200 Case 7 Fans

This rig seems to me thus far quite future proof for my needs and has much room for expansion. I can't say I'm comfortable using a 750w PSU despite what some people have written is 'fine'.

 

[orangegator]

http://www.extreme.outervision.com/psucalculatorlite.jsp

 

[LiamWolf]

Thanks for the link.

I entered everything and adjusted for running SLi and o.c. the cpu to 3.22 at 100% load.

The result was 427 watts.

I would say 500w PSU is the way to go but I'm absolutely sure that would be a mistake.

I must be doing something wrong.

 

[orangegator]

I just entered your specs with sli with the mild oc to the cpu and 100% load and 20% capacitor aging and got 690W. Overclocking the cpu higher could use more power. You should be fine with 750W. If you want to be extra safe, get 850W. That psu calculator already includes a safety margin, though.

 

[raybob95]

$120: Corsair 750TX
$140: Corsair 850TX

These are both PSUs of the best quality.

P.S., the safety margin on that calculator is 34W.

 

[LiamWolf]

Think that I will go with the 850. Appreciate your quick replies!

 

[raybob95]

Think that I will go with the 850. Appreciate your quick replies!

I just ordered the 750TX last week, and just by opening the box you can tell it's amazing quality. Namely because it comes in a Velvet wrapper, and beautifully braided cables.

Reviews say that the 750W is capable of putting out over 920W with 80% efficiency, and correct non-fluctuating voltages. 😀