Only removable chip aside from the CPU is U17, which is an 8 pin DIP. Says Winbond on it. I can't read the number, at least not without taking the board out of the case so I can get a good look with a magnifier. Getting presbyopia when your eyes are already myopic really sucks.
I haven't seen a DIP chip on a PC motherboard in a long time. (Since the mid 90's.) One wonders how this board manages with a little 8 pin when the old boards used 20 or so pin DIPs or PLCCs or soldered. It does have a built in BIOS flash program, but it only works with a genuine 34pin cable connected floppy drive. A USB floppy or thumb drive doesn't work. That flasher does do integrity checking. I flashed it anyway and the first time it failed, despite doing a full format twice on the disk before copying the file to it. Such effort Biostar went to for making it easy to update - then never released any updates. Surprising they put the BIOS file online to download. Why bother when it's identical to what shipped on them all?