It's dead, Jim. The 9600GT was a really well-balanced card overall, and I understand your hesitance to let it go. I replaced mine with a GTX 660 last year, but it had been in service for close to five years.
And what a surprise to see someone mention a Voodoo Banshee in a positive light. Mine was a Quantum3D Raven I snagged for a couple of bucks, and I kept that running in various Frankenputers for years. Its 2D was still so good that I kept it running connected to a second monitor in an XP box for a couple of years longer...
Work: FX-8320e, 16 gigs RAM, Geforce GTX 1050 Ti, Xubuntu 16.04 x64
Play: i5 6600K, 16 gigs RAM, Radeon RX 480, Windows 10 Pro x64
HTPC: i3 4170, 8 gigs RAM, Radeon R7 370, Windows 8.1 x64