HD 5850 or GTX 470 in new build (PSU enough)

[DirtSpider]

Hello forms this is my first time posting!

I have built myself a new rig and the only thing left to upgrade is my GPU. My current specs are:

Case: CoolerMaster HAF X
Motherboard: ASUS P7P55 WS
CPU: i5 760 @ 2.8GHz
GPU: 8800 GTX (768mb)
RAM: G.Skill 8 gigs DDR3 PC-1333, 10666
Audio: Audigy Gamer X
PSU: OCZGXS600 (650 watts, 18 amp +12 rails)

I have been using Nvidia my entire life and have never put a ATI card in my personal gaming rig before. I like Nvidia and I also my want to take a CUDA coding class in the next year. I'm not worried about heat either my case keeps anything cool. I'm worried though that my PSU will not handle the GTX 470's power or amperage needs. Thus I find the HD 5850 would be a much "Safer" bet in that department. I'm really only using this rig to play Valve based games like HL2, StarCraft 2, and Diablo 3 when it come out.

Do you guys/gals think that my computer can run a single GTX 470? I have looked all over for reviews of both and found a lot of conflicting info on the power usage of the GTX 470.

Here are the two cards I'm looking at:

GTX 470 --> Newegg.com - EVGA 012-P3-1470-AR GeForce GTX 470 (Fermi) 1280MB 320-bit GDDR5 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card

HD 5850 --> Newegg.com - XFX HD-585X-ZAFC Radeon HD 5850 1GB 256-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card w/ Eyefinity

Thanks to anyone that can help me with this issue! :)

[Zero82z]

If you want to get into CUDA programming, I would suggest a GTX 460 instead. It's not as fast as a 5850 or 470, but has similar power consumption to the 5850 and it should be fast enough for your needs.

[DirtSpider]

Thanks Zero82z I will take that into consideration also fix type it's 600 watts and has 4 +12 rails each at 18amps

[JD]

Yeah I agree, the GTX460 should be adequate. However if you have a fairly high resolution monitor, then the GTX470 may be a better choice.

Either way, I think your PSU should be okay. Not sure if I'd attempt overclocking too much though.

[Realityshift]

NCIX.com - Buy MSI GTX 465 Twin Frozr II Golden Edition Fermi 607MHZ 1280MB 320-BIT GDDR5 2XDVI PCI-E Video Card - N465GTX Twin Frozr II GE UNLOCKED In Canada.

Just picked up one of those from NCIX, for me its more about the card running cooler and quieter then whats already in my system. But 309 for a fully copper GTX 470 (comes unlocked to a 470 from ncix) isnt to bad.

[FlyingFish]

If you get the HWC newsletter you can get it for $259+tax

[Pine]

Well, the 470 is pretty power hungry and hot, I'd suggest a 5850. But a 465 twin frozr is a great idea, especially for $260, because you can unlock it to a 470 (All the twin frozr's off ncix at least, I think...).
So, a GTX 460 or a 465 for a bit of extra power for a higher resolution.

[Realityshift]

Yea the 465 from NCIX comes unlocked by linus himself, I would have tried to get it PMed but you cant PM when you pay via EMT :( So I just paid full price, not sure what the power differences are between the 465 and the 470, but the twin frozr runs quite a bit cooler then a stock 470 :) and looks better.

[_dangtx_]

add another 460 to the mix. although not sure how it plays with your programming in sli mode. and your psu+

[Realityshift]

Personally I would bump that PSU up, but thats just me, not at all a fan of multiple rails. Also dont even look at SLI with that PSU, your going to be breaking threashold doing something like that. Try for a Corsair or XFX 750/850 especially if your looking to add another card further down the line.