Powering a IO Board with Type X's own power supply

[Butter Meister]

Most IO Boards want 12v and 5v power inputs to run. Normally you'd get these from a candy cab's power plugs, but I don't have a candy cab unfortunately. But Molex from the Type X's power supply is a good enough source. I tested this out with a spliced together cable: 12v and 5v JST's to female molex, running into the case via a PCI slot cover with molex out. The voltages are consistent and everything boots up as it should. I see this as a convenient way to get IO boards powered when you don't have proper power wiring available.

What I used:

PCI Slot cover with Molex - https://www.performance-pcs.com/diy...ver-4pin-molex-3x-3pin-fan-plug-ph-82391.html
Note: The 5v line isn't connected on this thing, you'll have to solder wires to connect it yourself
Molex extension - https://www.performance-pcs.com/cab...ex-psu-extension-cable-30cm-ak-cbpw02-30.html
Get 2 of these, one for inside the case, one incase you wanna recreate my wack ass cable

Is this bad for the power supply?
The PSU's in the Type X series are 400w and have free molex ports. Enough wattage is available and in my tests, my Type X2 still booted and played games as it should.

Molex bad tho
Yes

 

[nem]

That's fine, the power draw is negligible.

For Sega IOs, only 5V is needed for operation. 12V is just used for the outputs.

PS. OP's choice of wire colors and connectors is an accident waiting to happen. Just reiterating this.

 

[Butter Meister]

That's fine, the power draw is negligible.

For Sega IOs, only 5V is needed for operation. 12V is just used for the outputs.

PS. OP's choice of wire colors and connectors is an accident waiting to happen. Just reiterating this.

I'll try seeing if it can run off the Type X2's USB ports then before I make a more permanent Molex power cable.

EDIT: Yes, at least with my Sega Naomi board that only takes 100mA, you can power it off just the Type X motherboard's USB port

 

[rtw]

I'll try seeing if it can run off the Type X2's USB ports then before I make a more permanent Molex power cable.

Those USB ports are limited to 500mA and connected to 5VSTB i.e. always on IIRC.