Is 400W PS enough?

[RocafellaXXX]

I was thinking about buying one of those new Ultra X-Connect PS and they are pretty expensive, but the 400W one coast the least.
What I wanted to know is 400W going to be enough for my new system:

-------------------------------------------------------------------

Gigabyte K8NSNXP-939 nForce3 Ultra
AMD 64 3500+/Winchester
Corsair XMS, Xtra-Low Latency 1GB(512x2) PC-3200/2-2-2-5
Deciding between Seagate 200GB 7,200RPM SATA HD and Western Digital Raptor 74GB 10,000 RPM SATA
Lite-On 52x32x52 EIDE CD-RW
NEC 16X Double Layer DVD-RW
BFG 6800 GT OC

Is 400W enough for this and possibly more upgrades or should I pay extra $20 and get at 500W.

P.S. For those of you who don't know what Ultra X-Connect is click here: http://www.xoxide.com/ultra.html

[hazards32]

Pay the extra and get the best .

You are spending a lot of money on fantastic new kit and it would be a total waste if you ruined it with t a psu on the edge . Thats what that psu would be ,on the very edge of enough .

Definetly worth an extra $20

[fabulouscoops]

I agree, get the 500. Don't forget you have USB ports, fans, etc. and if you want to add a hard disk or memory later or want to try out overclocking, you will be happy to have the extra juice.

[Caxus]

You don't need that much at all. You'd probably be fine with a 300w but i'd get 350 just to be safe. People overesitmate ps wattage needs by a lot.

[Kato-]

A quality 350W PSU will do just fine, so if you get 400W there's more room to grow. I have blown 450W rated PSU in two weeks where I was running a 300W PSU for over a year. Cheapo PSUs are usually very light, quality PSU are usually quite heavy (dirty trick http://forums.ubi.com/groupee_common/emoticons/icon_smile.gif ).

Of course if you plan to add several more disks, USB powered devices, a power hungry video card, you will be safer with 500W.