Just to confirm as it's not mentioned, does your motherboard supply the CPU VRMs from the 12V rail? If so, you should be comfortable with a modern ATX12V PSU.

no idea, don't think so, the mobo I will using is this

https://www.cnet.com/products/jetway-v600dap- … -v600dap/specs/

That board is designed for 5V heavy loads, so you'll need to source an appropriate ATXv1.3 power supply.

The Startech ATXPOWER300 (~$35) seems like a decent brand new option for these 5V-heavy systems. 30A on the 5V rail and only 15A on the 12V. It's ATX 2.03, but seems to have enough power for an Athlon XP build. It's rated for 180W on 3.3 + 5V.

ok how much watt would nvida GeForce xtreme need as it molex power slot on card

The 6800 should draw from 12V on the molex connector. Max power delivery for a single molex connector is 11A @ 12V, for 132W. The AGP spec allows for ~42W max on the slot (from a combination of the 3.3V/5V and 12V). So if the card only has a single molex connector you *should* be under 180W on 12V, and have about 150W free on 5V for the CPU and other 5V components. The card may also draw some power from the 5V rail on the molex connector, which I haven't accounted for here. So it will probably work, but you wont have a lot of headroom. I'd try finding something with a bit more power output, and fallback to the 300W unit as a last resort.

ok would 500w be overkill because reading online that 6800 series of card says it need min of 400w or something like that

The recommended power supply rating on most GPUs is very high as a safety margin for the manufacturer.

A 500W power supply won't be overkill. The problem is you need to find a power supply that can handle a large load on the 5V rail for that Athlon XP. That 3200+ has a TDP of ~80W. Modern power supplies don't handle large loads on the 5V rail very well. A modern 500W power supply with a 25A 5V rail might handle it, but you are cutting it very close.

I just want to make sure everything would be ok and run as smooth as possible and the rig to suppose to between old skool and modern

my dos-win95 rig is old skool
this rig of the in middle
my win 10 rig is modern rig

I recommend using any old EnermaX power unit or Delta, they work best for me, and the build quality and the power delivery is superior...

ok would work for what I need cause i know its bordering the old and modern hardware

Robhalfordfan wrote:

ok would work for what I need cause i know its bordering the old and modern hardware

Just stick with a reliable manufacturer and make sure the +5V and +12V label ratings are beefy enough. Please be aware that you might have to perform some recapping if you choose a used PSU.

Here's some options for you to look for:
The PSU Matchup Thread

so what would the recommend voltage on both lines be

Well 400W Delta PSu or EnermaX, Seasonic will be ok for your system, you need just 25-30 amps from the +5v..

would any of these do

https://www.ebay.co.uk/itm/Enermax-EG465AX-VE … 6EAAOSwBV5acGpL

https://www.ebay.co.uk/itm/Delta-Electronics- … 4YAAOSw0e9U1hvF

https://www.ebay.co.uk/itm/Delta-DPS-450DB-S- … ~gAAOSwonBaDvBd

That Enermax looks excellent

All of them, as im not sure if that 2 Delta units are proper size, also if they will work with normal motherboards, as i have here similar Delta from HP station that is 465W, is little bigger, and 80% of all motherboards just does not work with that PSU as the wires on the 20 pin ATX connector are changed.... This with all these 3 EnermaX unit will be ready to go when you get it, no problems, but it have inferior quality of the caps, while the Delta units have japan high quality caps and they will be more stable and last way longer, but they can have the problems i mentioned... But i think you will be ok to go with the EnermaX.

Katmai500 wrote:

That Enermax looks excellent

And it is, i have one of those in the machine i did build for a friend, is rock solid, BUT the caps inside are not japan ones......

I never had an issues with caps before as my older rig for dos gaming use a 200w AT psu and not any issues with it

would 450w be enough to power everything that will in it and any thing else I might want to add or upgrade in future

Yeah as im using 400W EnermaX Liberty on my 462 machine where it have ATi Radeon HD3850 AGP and Clocked AthlonXP-M on 2.6GHz rock solid...