I was thinking maybe because my board is X16 and card is 2.0 but I am at a loss on what to do. Feels like I might be damaging my comp with constant restarts over and over. But, like I said if I try to shut comp down normally will always tell me computer was shut off incorrectly and want me to go into safemode anything but safemode restarts comp.

Here is how I fixed my problem.
 
I did a fresh install of windows 7 x64 on my system. Installed 266.xx drivers from the evga website and then installed the chipset drivers that came with my asus motherboard cd. And lastly restarted my computer.This resulted in the login freeze that many of you guys are experiencing.
 
So I reset my CMOS and unplugged everything that I didn't need such as USB 3.0 ports, extra Sata/IDE hard drives, etc. Afterwards, I turned my computer back on again and I logged right into Windows. I am pretty sure this is a drivers issue, not hardware.
 
I've read that this is a sound card error. Are you guys setting your audio to AC 97 or HD Audio? When I set my audio to HD Audio as opposed to the AC 97, I am able to log in without the windows freezing on me at the login.

Thank you, thank you, thank you! This fixed something slightly different yet just as annoying, since I get a 400 series card for my PC it wouldn't go to sleep. I tried countless things, from the basic to the extreme and all I had to do was disable the audio device associated with my 400 and now it sleeps again. Thank you, this has been bugging me since last year when these cards came out.

 
I am having the black screen issue now. Three times black screened tonight while trying to play MoH. Boo.
 
2 x GTX 480 FTW Hydros
266.58 driver
70.00.35.00.80 BIOS on both cards
 
*shrug* 
 
 

 
OK.. have not had black screen at login again - just that first time, however I'm now getting black screen every time I try to run windows experience index..and that is every time without exception.
 
I also flashed Marvell firmware to latest version and re-installed the Marvell drivers.
 
Everything is running on auto / stock clocks - meaning CPU, GPU's, and RAM on auto, along with voltages on auto.
 
This is crazy. Thousands of $ worth of PC should not have this many problems.
 
I'm going to sleep.

****.. now the multiplier on my CPU is dropping down from x21 to x12 for no apparent reason..
 
edit.. oh wait, that sounds like speedstep.. must have forgot to disable it.

Holy Hannah.. I thought I had it under control.. boy was I wrong.. had at least 25-30 black screens tonight, to the point where I'd reset, get to windows login, then it would crash again.. over and over. I went through every step on the OP of this thread again tonight, and it was ok for a while, then it started doing it again, and with increasing frequency. Just opening a freaking pdf file caused a black screen about 15 minutes ago! I am at my wits end.
 
It seems resets just make it worse and worse. Switching off and unplugging the PSU for a few minutes, then resetting BIOS to defaults is how I managed to get back into windows again and post this.
 
I've just ordered a Corsair AX1200 to replace my HX1000 to see if that will alleviate it at all, although I can't afford the expense atm.. so on the credit card it goes. Watch the marketplace for the HX1000 soon!
 
This is just so frustrating. I'm almost ready to part out the whole thing and buy a ready-built high-end gaming laptop and give up building PCs altogether.
 
Going to switch the SATA3 SSD to the standard SATA2 connector now and disable the Marvell plugs and see if that helps any. If I don't come back, you'll know that I was unable to login again because of blackscreens.
 
 
..an hour later: Was hopeful, then I ran 3DMarkVantage and blackscreened part way through. No overclock on anything.
I don't know what else to do.

Worked ok all day with SLI disabled, then it black screened again while playing Civ V. Rebooted, got into Civ V, and it blackscreened again within a few minutes. I shut down the PC and powered off for 15-20 minutes, came back, and was able to play again for half an hour.. then I came here.
 
It's like there's some 'thing' that builds up over time, and once it hits a certain level, the PC keeps black screening over and over until it's been powered off completely for a good 15+ minutes, then everything is ok again for a while, until it builds up to some level again and it's rinse and repeat.
 
Seriously, is nobody else still having this problem, or have they all just sold their rigs and moved on?
 
I'm on a water setup, so it's a major pain having to swap or remove cards etc just to test different setups over and over. I'll could go try a single card only again and see what happens... although I'm still blackscreening even now with SLI disabled.. and going back through this thread, there's been very close to jack schitt from NVidia or EVGA about it.. 

I did not get any log in Problems at all just this. this one of many that I took each one is worst.
 

Was using an MSI 980-g65 mobo, got random black screens, no startup errors, now using it in my Gigabyte 890FX UD5, nothing but issues, it will run fine for about an hour, then take a dump. So is there no good fix then? Obviously there is a problem here... My specs below:
1090T
Gigabyte 890FX UD5 (BIOS F7)
Silverstone 850
4gig, Gskill Flares, 2k
120gb sniper SSD
GTX 470SC
Win7 Ultimate 64bit

I ended up RMAing my gtx 470 that had this problem to evga, and got back a card that is even worse then the original!!

My original card would black screen from a cold boot, reset, then the card was fine for the day.

The RMA card black screens everytime you boot and is totally unusable sometimes with pink artifacts all over the screen. I am very upset about having to RMA it again and waste more time on this problem. What is going on with this? I think customers deserve an explaination from someone, either it be EVGA or Nvidia.
 
On top of all that trouble, my original card hard a highflow bracket installed and they sent me back a stock original one!
 
Needless to say I will never be buying an EVGA product ever again.
 
 

Ok i have been running my 460 with my MSI board with no problem but on my 450 on my new build for my daughter I get random crashes and errors. I went to go to guru3d.com to get the driver sweeper and it says it is no longer available or supported?  where else can I get a copy?

I've been beating this issue since EVGA RMA'd my 275 for a 470.
 
In one hand I'm happy to see 10 pages worth of other people having the same problem, at least I know what the problem is.
 
I've tried this fix on my own (I put 2+2 together on my own).  It helped, but did not fix. 
 
This is crap, I've spent tons of time trying to resolve this on the phone with EVGA, no one knew about this?  They need to make good on their mistake.  I think they know about this and that is why everyone is getting the 470 for RMA. 
 
Anyone know if the 500's have the same issue?

 
From what I've heard it's not just EVGA, but to reiterate my earlier posts, I have not had a single black screen since I upgraded my PSU to the Corsair AX1200. Not even once.

You know, this has had me perplexed for a long time. I tried everything to fix it and nothing would.
I have also been having BSODs and thought that the black screen was part of the BSODs and I have since fixed them, found it was my combo FDD/Card Reader.
I happened on this thread today and have done what was suggested, hope it works :)
Thank YOU.