Sufficient SLI Power?

I have this kingwin 730 watt PSU. I'm having problems with games in full screen getting artifacts when sli is enabled. I'm thinking maybe I don't have enough power? My question is my power supply powerful enough to support my system?
System Specs:
Core i7 920
6gb ddr3 1333
2 GTX 280's
640GB WD hardrive
NEC DVD burner
MSI X58 Pro-e mobo
or does anyone know what may be causing the problem? I get no artifacts when disabling SLI or when i run the game in a window instead of fullscreen.

I don't like your PSU. Try to borrow a PSU made by a certified brand from your friends and see the difference.

Yes sorry I forgot to mention that I've tested both cards independently and they are both working perfectly. PSU: KINGWIN ABT-730MM 730W ATX 12V Ver.2.91 SLI Ready CrossFire Ready Active PFC Power Supply. newegg link: http://www.newegg.com/Product/Prod [...] win%20730. temps are around 40 idle and 65-70 load

I'm currently on forceware 190.38 which i've reinstalled a couple of times but nothing changed. What do you guys think about either going to an older driver version or the beta 190.40? unfortunately no i don't have any extra power supplys. Any other suggestions?

Yea, I wouldn't power dual 280's with anything under a Corsair TX750.....

On what resolution/settings do you play?

Faulty bridge perhaps? Do you have another bridge that came with the other card you could try? Really you should have the bridge on there since that's what syncs the cards together.

I guess it must be faulty although I do not have another bridge to test out. Really disappointed if the bridge is faulty since I had to order it off ebay because neither my cards or mobo came with a sli bridge.

I always thought so too but reading around I'm not so sure. my 3dmark vantage scores are nearly identical

I'm thinking it's the psu too, but why can I still play games perfectly fine in windowed mode if my psu cant handle the sli set up?

uuuggghhh..... guess i'm getting a new PSU

Try to borrow an SLI bridge first from your neighbor and see if it would do the trick.

if the pins are only missing from the middle you should be fine at that resolution, thats what my dvi cable looks like

Before running benchies, turn the Sli indicators on and if you are in SLI mode without the bridge and no visual corruption just go with it.

Try getting a new bridge first (much cheaper).

can anyone recommend a PSU manufacturer and wattage for dual gtx 280's and a core i7

This is what I would buy :

CORSAIR CMPSU-850TX 850W ATX12V 2.2 / EPS12V 2.91 SLI Ready CrossFire Ready Active PFC Power Supply
http://www.newegg.com/Product/Prod [...] &Tpk=850TX

if you want modular......

CORSAIR CMPSU-850HX 850W ATX12V 2.3 / EPS12V 2.91 80 PLUS SILVER Certified Modular Active PFC Power Supply
http://www.newegg.com/Product/Prod [...] &Tpk=HX850

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waiting for the trolls to disagree and pull out the infamous PSU calc.....

I guess I jumped in front of you..... lol

ordered a corsair hx1000w from newegg friday.