I moved your thread over to the main g series forum. It will get read here.
I personally wouldn't try to upgrade a machine that old. The cooling is custom to that card and parts tend to be too expensive for the performance anyway. If you can get a matching replacement graphics card for cheap on ebay then that might be worth fixing.
A bus station is where a bus stops. A train station is where a train stops. On my desk, I have a work station…