Maximus V Formula gone haywire

i have a Maximus V Formula running the 1803 BIOS

Lately it has started doing a few strange things such as giving me 3.3 and 5v rail low voltage warnings and saying that my mobo is at -1 deg and my ssd at 81 deg C

WTF is going on here?  

also the 1803 BIOS is no longer available on the ASUS website - its back down to the 1802 BIOS but I have the same problems with both BIOS's

any ideas?

thats strange on the Dutch asus site, its still available. but if you havent had the problem before with bios version 1802, then there must be something wrong..try to reset the bios, or flash it again. if it still doesn´t work, then you better contact asus about the issue.