The closest info that I found, when searching for similar data on the FX 5900, is here --> Question about Geforce FX 5900 current draw per rail

No 3.3 on the molex, it's 5 or 12

Almoststew1990 wrote on 2020-07-09, 21:17:

I am building a Socket A PC and have an eye on my power consuption. I've got an XP 2000 which will use 70watts on the 5v rail, one IDE HDD, one IDE DVD drive, one 120mm fan. My PSU can do 35amps on the 5v rail = 175watts (lets be safe and call it 130?)

I want to put a FX5900 XT in the system. This has a Molex power connector for additional power. How much power will this card pull, and what rail will it come from as I think molex can deliver both 5 and 3.3v? How much power does the AGP slot provide (and from what rail?)

Thanks

See the added replies I made, I managed to find all the missing pics and uploaded them again here
Re: Question about Geforce FX 5900 current draw per rail
It doesn't contain your exact card (which is the FX5900XT) but it does have the more power hungry FX5900U along with the less power hungry FX5700.
Not an exact match but at least it's something 😜

If I remember my fx 5900xt box recommend a 300w atx power supply, hopefully that helps.

Almoststew1990 wrote on 2020-07-09, 21:17:

I am building a Socket A PC and have an eye on my power consuption. I've got an XP 2000 which will use 70watts on the 5v rail, one IDE HDD, one IDE DVD drive, one 120mm fan. My PSU can do 35amps on the 5v rail = 175watts (lets be safe and call it 130?)

I decreased the load on the 5V on my system by installing an Athlon XP mobile (which can still be found on eBay), and undervolting it. You should be able to bring the voltage very low in the BIOS depending on which model you have (the higher the better, 2600+ being the best), and also depending on the current frequency (I'm running it at 1866 MHz).