Well, I have to say that I am a "happy bunny"
Having picked up a Molex power splitter cable yesterday lunch time, I hurried home with some excitment. Got dinner out of the way, cleared the table and set about putting the 6800 in.
Step 1 - I downloaded and installed the latest nvidia drivers which are applicable for both the fx5200 and the 6800. re-booted the machine and tested. All Ok
Step 2 - To give the card a bit more room I decided to remove a redundant dial-up modem and move the sound card to a new slot to leave some space around the graphics card. I de-installed the modem and re-booted. tested - All Ok
Step 3 - De-installed the sound card, shut down, moved the card to a new slot. Re-booted. Ran dxdiag and tested. All OK
Step 4 - Fitted the molex y splitter to the floppy drive feed, swapped out the fx5200 for the 6800, re-booted.
Ran dxdiag again and tested display. All Ok
Step 5 - Started up the game and ran the Black Death track. Max fps has gone up to around 60, average low 40's. This has gone up from an average of about 24 fps.
Step 6- Go to bed with large grin on my face.
Many thanks to those that have helped me in my recnt spate of upgrades (BBloke, Quazi on email, Delta7, B16enk and Crash) Cpu, Sound card and now graphics card. Total cost was about £70 spread over about 4 months.
Of course, the only trouble is...when I was walking to work this morning, it got me thinking....., I now have a half decent sound and graphics package, I have an operating system (thanks bbloke