OK so first, specs
Intel Q9550 Water Cooled
XFX 790i Ultra
2 X EVGA GTX 295 Hydros - Water Cooled (Duh)
1 X GTS 250 (Physx)
4GB OCZ DDR3 1600Mhz
4 X 146GB Sas 10K
PCI-EX1 Sas Raid Controller
1 DVDRW
1 BFG Tech 1200 Watt PSU
Swiftech Dual 120MM Radiator and Pump
 
All Temps stay well below 45 Degrees Celsius under a FULL Load. Nothing overclocked currently.
 
Onto the Issue:
My computer runs fine and has 0 Issues, I pass Memtest and Prime for 12+ hours each. The second I install the SLI Bridge that came with my XFX Motherboard (Brand New) my graphics in all my games are messed up. the colors are very strange Bright blues and greens and other random colors, the screen is pixelated and the refresh rate looks to me messed up. Remove the SLI bridge and everything is great including performance. I bought a brand new Asus SLI bridge and same problem... Help?
 

I swear I already responded but I dont see my post so, I have tried this but it did not resolve the issue. EVGA says its either bad cards or power. They are RMAing my cards and I have paid for Cross Ship but after 4 business days they still have not shipped the new ones via overnight. My Power Supply is brand new and has more than enough power BFG Tech 1200W and I tried an Antec 850 True Power with no joy. So I shut every breaker in my house off and only left my new 20AMP 12Guage circuit in place to try to test my card and it had the same issue. I tried to get screen shots of Fraps video and both do not show any pixelation, screen flickering or crazy colors. I tried a different monitor a 17" Sony LCD via the DVI connector at 1024 X 768 and it was the same problem. If I try to benchmark with quad SLI with no SLI bridge I get 14000 on 3DMark06, if I try with a single card I get 14800 and if I try with the SLI Bridge on I get the issues I mentioned but also the test fails with the following error IDirect3DDevice9::Present Failed: n/a (Unknown) and I crash out of Left 4 Dead2 and COD MW2. Im very skeptical about the new cards fixing this issue. I used EVGA Precision and not one video GPU or my CPU got over 41C during the benchmark or gaming. I have no overclocking at the moment. Very disappointed in these cards so far, Ive had these for just over a month with issues since I installed them.

You are restarting and enabling SLI everytime you remove or install that bridge, right?

I am restarting every time to install the SLI Bridge(I would never install it while the system is powered on). I have one Rigid SLI Bridge that is exactly spaced for my MOBO that came with my Mobo. The other is an Asus Ribbon Cable thats is extra long. I will try installing the SLI Bridge without the screws and then screw it in. I am running Driver 195.62 which is from 11/26/2009. I also tried a newer drive from December without luck. I also tried a random drive from Febuary I think it is also has the issue. I will try these suggestions and report back. Thanks

I have had the same problem since the GTX295 Hydo Coppers came out....RMA'd them both and still have the same problem with the SLI bridge connected.  The bridge I have is flex and came with the X58 and tried the one that came with the x58 classifed with same result.  I get shadow flickering and a blue tint in vantage and Cod w@w.  I thought may be PSU also.  I was using the TT 1200 modular and replaced it with PC Power and Cooling 1200 with same results.  Using an X58 vanilla by the way.  Let us know if you find a solution.

OK so I was in a hurry with a few of my posts but since it appears a few people are having the same problem as me I will document the 5 weeks of tech support I have had with hopefully a solution shortly.
I bought these cards on November 19th and immediately had issues. My Issue is as follows:
Single EVGA GTX 295 Hydro - No Issues
2 X EVGA GTX 295 Hydros in Quad SLI with no SLI Bridge - No Issues
2 X EVGA GTX 295 Hydros NOT IN Quad SLI with SLI Bridge - No Issues
2 X EVGA GTX 295 Hydros in Quad SLI with SLI Bridge - Weird Screen issues
When the SLI Bridge is installed and Quad SLI is Enabled I get a rapid refresh rate problem and colors are off and appear as tinted blue. This issue does not affect performance or stability but is too painful to look at. The refresh rate is so messed up it makes me sick to play on for more than 5 minutes. I have tried 2 Hard SLI Bridges and 1 Flexible with no improvement. I spoke with Tech support at least 10 times over the course of the last 5 weeks.
 
I have tried each card by them self in 3DMark Vantage - No Issues
I have removed all devices not required for system use, extra ram, dvd drive etc - No Improvement
I have tried to force the Refresh rate to 59Hz - No Improvement
I have disabled Physx - No Improvement
I have tried Windows Vista 64 bit - No Improvement
I have tried Windows 7 64bit - No Improvement
I have checked my Temps of GPU and PCB while benchmarking using EVGA Precision - All below 50C and cards are barely warm to the touch
I have tried an Asus Striker II nforce 790i Board - Same Problem
I am currently running an XFX 790i Ultra Board - Same Problem
I have tried my computer at another House with known good power - No Improvement
I tried PCI-E Spread Spectrium is disabled - No Improvement
I tried PCI-E Spread Spectrium is enabled- No Improvement
I made sure my Max Payload size was 4096 - No Improvement
I made sure my PCI-E First Init was set - No Improvement
I have run OCCT:GPU, OCCT-MEMTEST, OCCT-PowerSupply - No Issue
I have run memtest86+ 4.0 for 12+ Hours - No Errors
I have run Inte Burn in test (Linpack) for 1 hour - No Errors
I tried to take screenshots of this issue but every screenshot is flawless
I tried to record video via fraps and it also shows the video as having no issues
I updated my Bios to P09 released December 2009
I unscrewed both cards and installed SLI Bridge (Ensuring no tention) - No Improvement
I confirmed the issue occurs on 3DMark06, 3DMark Vantage, Left 4 Dead 2 and Call of Duty MW2
My Current Setup
XFX 790i Ultra
Intel Q9550 @ Stock
4 X 750 Seagate ES Sata 3Gbs
1 DVDRW
2 X EVGA 295 Hydros @ Stock
Swiftech Water blocks/radiators/pumps/res
2 X 2GB DDR 1600MHz @ 1600Mhz 7-7-7-28-2T @ 1.9V (Stock)
 
I have both cards being RMA'd and I should have new ones by tuesday-thursday. I paid for overnight but its already been two weeks and they have not shipped me replacements. I called and complained and they said they are manufactured by hand and they should ship on Monday.
 
 
I have a video I took using a webcam so you can see the issue, I know its not the best quality but I will also describe it to you. There is a constant flickering of the screen, shadows are pixelated, colors are not right. Performance is not impacted by this, atleast not that I can confirm. Stability is also not a problem, everything is very stable.
http://katalystclan.com/EVGA295.wmv  
I have also attached some pictures. I have a single card that scores 10,000 3DMarks only doing video tests, 20,000 3DMarks only doing video tests with SLI Bridge installed. I get about 19,000 3DMarks only doing video tests with no SLI Bridge but also have no issues so... (No picture)

The only thing I don't see in your list of things you tried is reformatting and reinstalling windows?  If it were me I would give that a try after all that.

Reformatting and installing windows with 1 or 2 shouldn't matter at all but at this point you have tried everything else under the moon.  I hope you get it fixed soon! 

vista and win7 use the same drivers so I'm not sure what he meant by that, maybe that vista itself is more mature but win7 is solid in my book. 

yeah that they are water cooled does make a huge difference as far as installing/unisntalling (argh).  My P55 board has a little control panel (ECP V2) and you can disable a card with a switch for situations just like you are talking about, now I see why they made that. 

Good luck and you'll get it sorted!

Ok so heres a quick update. I called yesterday and spoke with Customer Service. I told them how upset I was that after almost two weeks my replacement cards still had no shipped. I told him about my experience since I bought the card on November 18, arrived Nov 19, Installed Nov 19 and submitted 10+ tickets since then to resolve the issue. I tried every single test they asked even though it took hours and finally they RMA'd the cards two weeks ago tomorrow. I find out today they cancelled my RMA to force me to call in to answer a question: Have you tried these cards indivually? A Question that was asked by every single tech I spoke to and answered. What a joke. I told the customer service rep that if he doesnt ship my cards by tomorrow, dont bother... I want a refund... I have been buying EVGA Cards for many many years. Just in the last 3 years I have owned EVGA 780 Board, 2 X 8800GTX, 2 X 9800GX2 and now 2 X GTX 295 Hydros. I cant say I will every make the same mistake again. These cards should have been fixed within a week of getting them. Now they are playing games and canceling my RMA #? Also do they not document any of their work when on a support call? Everytime I spoke to a tech was like reporting a new issue for the first time. BFGTECH, here I come.

I will let you all know if they actually ship my cards tomorrow and if that actually fixes the issue. Otherwise I will report back and let you know how the BFGTech H20 GTX 295's do.

Man, I was really hoping this would also fix mine. I whiped it down with a alcohol prep pad and waited 30 mins for it to completely dry and reinstalled my SLI Bridge. This did not fix my issue however the concept makes sense. I am going to visually inspect both SLI connectors and clean them again more throroughly and try all my SLI bridges again to see if maybe at this point the dust/dirt might be inside my sli bridge. I will report back more once I have tried more testing. Thanks for the tip

One card came in today, one is arriving tomorrow. I will be installing both cards tomorrow for sure as I dont want to spend friday doing it. I might even play with the one I get tonight and see if I cant find out which one of my cards is back. I wonder if I can run these without water cooling just long enough to get into windows and open any game or my benchmark.

It was a pain to get underneath the cards pin, used a q-tip and made sure no fibers were stuck when I was done. With as small as those lines are the smallest bit of dust would cause problems imo.

My RMA replacements looked like this....on a $700 card....geez