I noticed something weird today. I have a Mac Pro 5,1 with 10.10.3 (14D136). I am running an EVGA GTX 970 SC, unflashed, straight from the store. My NVIDIA Web Driver version is 346.01.02f02. When I look at the NVIDIA Driver Manager is says I am using the OS X Default Graphics Driver. Is that even possible? Is it just some kinda weird glitch? I did try to switch it to the NVIDIA Web Driver, and did the requested reboot. It took 4 or 5 times longer to boot when I did that, and when it finally booted, it still said OS X Default Graphics Driver. I also tried reinstalling the web driver, to no avail. The card seems to work fine. Also, I am not sure if I just didn't notice it before, but I don't think this problem existed when I first updated to 02f02. The only thing I can think of that has changed is that last night we had a decent sized thunderstorm come through. So I decided to shut down and unplug the Mac, even though I have a battery backup for it. I shut it down and unplugged and turned off the battery backup. But there was not surge or power loss. It had the slow boot when I turned it on this morning. At this point, since everything seems to be working, I am just wondering if it's possible I am running on the default driver and am not getting all I can out of the card. If it isn't possible to run an unflashed card on default drivers, then I'll just chock this up to a weird glitch. Also, my boot time sucks now, which I'd like to fix. Thanks for looking!