what is the difference between a atx power supply and a atx 12V power supply?

Supply us with some links.

I have plenty of ideas but I need more info.

i looking to buy a new power supply to replace a blown up one ,but it either had a atx standard or a atx 12V.
atx 12V 350 W

sry the link doesn't work try this one
atx 12V 350 W

if anyone could direct me to a better one it would help
thanks

"ATX 12V" has an additional 4 wire plug (2x 12V + 2x GND) that supplies the CPU and other voltage critical components on the mobo with 12V on its own rail (to ease the draw of 12V off of the 20 or 24 wire main power connector, which then lengthens the life of the power supply). A standard ATX power supply doesn't have this 4 wire plug, and isn't meant for modern mobos.

There's another spec of ATX power supplies that uses an 8 wire plug (4x 12V + 4x GND) instead of a 4 wire plug.

That additional plug is only for Pentium 4 computers. I don't believe any of the AMD mobos use that plug.

Some of the new Athlon 64's do....at least mine does

(actually, it wouldnt work without it)

I haven't built an Athlon 64 system yet.

On my Abit NF7-S mobo it has that 4 pin power connecter as well and this is a board for AMD's.

Fair enough. Athlon XP systems shouldn't require said plug on their power supply.

Wrong,

There are some Athlon XP mobos that require that connector.

heh yeah.. if your building a modern pc 10/10 ull need that plug