ATX 20-Pin to AT P8 P9 Power Supply Adapter Cable

This product is simple and does exactly what it is supposed to do. It reroutes all the power rails from an ATX PSU to their AT equivalent pins/connectors, as well as breaks out the "Power On" power supply signal that is normally provided by the motherboard. This allows you to connect it to an old fashioned hard switch on an AT case, OR, to connect up some sort of other hard switch. I don't have an AT case yet, and just had an old switch lying around, and it worked well for turning the computer on and off.In fact, this product is, in some ways, much safer than using an AT supply. AT supplies route the AC power through their switches. ATX power supplies are safer, and the switch in this case only sends a logic-level signal to the supply to turn on.

The wire is 18 AWG and the connectors are of good quality. I found no issues with them. I bought several of these for my employer to make use of a bunch of new and used ATX Style Power Supply's we had on hand from computer towers years ago. These ATX Power Supplies will work in our Bridgeport EZ Trak Mills and EZ Path Lathes which use the AT Style P8 & P9 Motherboard Power Plugs with this adapter.

Worked perfectly for attaching a modern ATX power supply to an older CNC machine. Coz it's a real problem getting older AT power supplies anymore. I just jumpered the switch wires

I'm using this with a generic 486 motherboard and modern power supply with no issues. You'll need to attach the two leads to a switch in order to signal to the power supply that it should start.