Originally Posted by oldcpu
BFG 8400GS PCI 256MB (not PCI-e) card on 9 year old Athlon-1100 (1GB RAM)
Life on on the trailing edge can be nearly as bloody as on the leading edge.
What kind of PCI slot is it? At 9 years old it may not be a very fast. Possibly the Nvidia driver occasionally needs to move data faster than it can handle.
Is the IRQ for the graphics card shared with another device? If so perhaps you can set a jumper or move cards around to remedy that.
Since this is an Athlon, is "athcool" running? That software installs by default on many (most) newish Linux distros and it can cause all sorts of odd problems, typically sound issues and a decrease in network throughput, but with an old PCI slot, graphics problems are not out of the question.