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...
Workstation: Ryzen 1700X, 16 gigs DDR4-2400, RX 480, Win10 Pro x64 / Xubuntu 17.04
Plaything: 2008 Mac Pro, 2x Xeon E5462s, 6 gigs ECC DDR2-800, GTX 660 Ti, El Capitan / Win10 Pro x64
HTPC: i3 4170, 8 gigs RAM, Geforce GTX 1050 Ti, Windows 8.1 x64