GTX580 Twin Frozr II OC BIOS File Help Please

Question

Hii guys!  I just got my GTX 580 Twin Frozr II OC installed today and I'm really excited but I'm having a bit of a problem.
I've tried flashing the BIOS using the MSI HQ USB Flasher but the program says that the BIOS file I downloaded from the MSI website is not a valid file. Live Update 5 can't seem to detect my motherboard model or BIOS Version and, possibly, as a result does not find any updates for the card. Also, the MSI website mentions an EXE file that's supposed to be in the BIOS file archive, yet there is no EXE file in the archive.
I need to flash the BIOS (?) because my graphics card keeps crashing when playing games.  Most times: black screen, followed by the card reverting back to stock speeds. Twice, however, the screen got completely messed up and I had to hard reset the computer. That was when I set the voltage to 1150. And yes, even at stock speeds and the stock voltage (which is how I have the comp running atm), the card crashes.. just after a longer while. It's also not a heat problem because my in-game temps stay around 65ish.
I'm sure the rest of my computer is stable because most of the components have been replaced including the old PSU I had; to a Corsair TX 750W.
I feel like I'm missing something obvious, because flashing the GPU BIOS is new to me.
But, any help would be greatly appreciated. 

Answer 1

Thanks a lot Svet! I was able to flash the BIOS without any problems, however I quickly returned to the old BIOS ROM because the graphics card was much more unstable with the "new" BIOS. (Which ironically also has a lower BIOS version number than the one that came with the card). Overclocking at all would really mess up the screen and at stock speeds (800, 1600, 2048) it would crash. I reinstalled Windows (went from 7 Home Premium x64 to 7 Ultimate x64) because it got messed up during some installations I was doing and now... everything's running like butter. :\
After booting it up, I reinstalled all my games and every single one of them runs fine. I still get some really bad FPS in Splinter Cell Conviction, which is upsetting because I was looking forward to maxing it out and playing it at 60.. but whatevs.
I've tested the card also using
Assassin's Creed (From 1 to Revelations)
Battlefield 3
Dragon Age 2
Deus Ex: Human Revolution
Crysis 2
Saints Row The Third
NFS Run,
and Arkham City.
The card has a lot of trouble playing Arkham City with Physx on or with any of the DX11 features and I'm surprised I'm getting poor FPS at all in some games because I'm actually only using a 1600x900 display. I'm not complaining because all the other games run maxed out pretty well; and the card seems stable. I was also able to overclock it, which was tricky until I decided not to overclock the memory - so that the Afterburner values are 1150 (voltage), 900, 1800, 2048, 85 (fan). It looks like if I overclock the memory at all the graphics card crashes. Was a tad disturbing as I read that others have gotten better overclocks but... again, the important thing is that it's stable and running well. But, out of curiosity, why can't it overclock higher like others have managed to get it to?
Two questions though:
I'm using Nvidia's 290.36 Beta drivers - is that okay? Or should I only use the drivers from MSI's site?
(To note, I've used all of Nvidia's drivers and they all appear to deliver the same performance across all games. By "all drivers" I mean the 280.26, 285.62, 285.79, as well as the 290.36.)
How long is the standard warranty on this card?
Again, thanks Svet for pointing me in the right direction.  :D
I'm even more excited now for SW: The Old Republic.
Aphax my GPU's serial number is "602-V255-060B1107208512" - why do you ask though?