Okay. As previous said, it is a BETA bios, but for the AMD 880K, you need to upgrade to the F2C Beta Bios, before installing it.
I'd say go ahead and install the F2C bios, which is more recent. Check for stability issues. If all goes well, then go ahead and upgrade you CPU. If not, revert to F1 and think about another upgrade path. (new motherboard or new rig)