Is there anything else I could try?
Other than "upgrading" to Voodoo3 or replacing the aging system with something else, not really. As soon as I replaced by A1200 BPPC + BVisionPPC with the peg1 + Radeon I didn't look back. It took me couple of months to realize I didn't even power up the A1200 anymore. I never missed the BVisionPPC... frankly Permedia2 just sucks.