Did you ever get it to work with your 8300? I have a MSI 670GTX and after multiple emailsto MSI support, MSI will not even consider offering a firmware update, they keep saying its up to Dell. Let me know your results, thank you.

I'm slightly confused here. I have the FTW. I don't have a dell and I don't overclock. My temps are stable at 67-68 under load and I'm not having any stability issues. Is there any benefit to me updating here?

I run update.exe (This process takes 13% of cpu time) and see this window over 20 minutes
Is it normal? May i close this window and shutdown my PC?
 
This process requires up to 30 minutes on my rig

Borss

I'm slightly confused here. I have the FTW. I don't have a dell and I don't overclock. My temps are stable at 67-68 under load and I'm not having any stability issues. Is there any benefit to me updating here?

I'm in the same situation.  Decided that if it isn't broken... don't fix it.
Not going to update.

Would this perchance fix an issue with my PC rebooting while gaming?  Ever since getting this GTX 670 FTW my PC will spontaneously reboot while gaming.  Doesn't happen all the time, maybe 1 - 3 times per week, some  days or even weekends I can game all weekend no problem then suddenly happens.  I bought a new Corsair HX850 power supply to see if that would fix it, didn't.  I got rid of my old APC to see if it was the APC and that didn't fix it.  I now have to think it must be the video card causing it.  I used Driver Sweeper and removed the latest beta drivers I was using and reinstalled the latest WHQL and it didn't fix it.  I ran memtest86+ on my RAM all night and it found no issues.  Any ideas?

Went ahead and flashed, hoping this will fix it but I'm not keeping my hopes up

So far so good here after updating. I updated right before vacation and since I've been home i did a couple runs of 3D Mark 11 and Vantage and my scores actually increased. Further testing...
 
Before update: http://www.3dmark.com/3dm11/4098838
 
After update:http://www.3dmark.com/3dm11/4130402
 
Vantage before:http://www.3dmark.com/3dmv/4235412
 
After:http://www.3dmark.com/3dmv/4241836

FOR THOSE WITH THE DELL XPS 8300. I can now confirm that the EVGA 670 GTX FTW does work with the bios update. History = have two Dell XPS 8300 i7, bought 2 MSI 670 GTX/OC. MSI refuses to provide a bios update so yesterday I purchased two EVGA 670 FTW from newegg and just got done updating both cards bios (both cards came with old bios) in a old computer and moved them to the 8300's. Both are working good so far in the Dell XPS 8300, so thank you EVGA for listening to your customers and providing this update.

I would also like to confirm that the EVGA GTX 670 FTW in working in my XPS 8300. Thank you based EVGA!

I was about to update the bios of my reference 670 but after reading about all the seemingly performance loses and throttling I'm going to hold off until someone from EVGA explains what's going on.