bios lagging/unresponsive on sandy bridge era asus mobo

Here's the spec on the pc:
mobo: asus p8p67 rev 3
cpu: 2500k
ram: g.skill
gpu: 5700xt
various ssds and hdds ect

anyways, had this box since the cpu/mobo came out, and moved it into living room for gaming / media / ect.

Recently, the bios went to shit. When I enter into bios the mouse is incredibly laggy, in super slow motion, and eventually just comes to a complete stop, as if it were slowly taking longer and longer to register my inputs, as if each one took an exponentially longer amount of time until lock up / freeze. I'm more or less unable to really change any meaningful settings and at least I was locked in to my safe oc settings. Problem is I can't manually change anything and save it cause the bios locks up before I make it that far. Anyone know why this would be happening, ect.

I'm afraid to pop out the little watch battery and reset the bios as it might be borked and I would be stuck with a paperweight, or unable to retreive oc settings again. halp me

Reset the bios for starters... I doubt you'd be stuck with a paperweight since it runs everywhere but in bios. You could always try reflashing the latest bios from their windows based program.

If you can get into windows I would look at the error logs, maybe the USB port is broken or some other hardware issue that overloads the bios with errors.

Disconnect all USB and other peripherals from the I/O panel except your KB and see if the bios is responsive/normal. If so, plug in 1 by 1 to see if it's a specific component causing it. Bios chip could be dying though it's not uncommon on those boards. If it does indeed die on you PM me I'll be able to help.

I'm gonna try the unplug everything and start there, will update!

also a side note, the slow down starts one screen before the ability to enter bios, and continues halfway into the windows loading animation, then the animation (little spinning dots) stop lagging and return to normal speed, as does everything else.