HP2

I have the SFF. But I'll just get a new SFX PSU and try to fit it in here

Exactly. This PSU as a peculiar L shape to leave more room to the motherboard, plus it has hinges riveted to the case. I'm sure a standard SFX PSU would fit too, but it's easier and cheaper to use the OEM one.

That is a very good idea, thanks! I found one that uses two SATA on eBay. Here is the link

Hi! I'm currently planning to massively upgrade a HP Compaq DC7800 with a Mini-ITX motherboard, R3 1200 CPU and a GTX 1050 Ti low profile to build a small form factor sleeper build. I would loooove to use the current 240w HP PSU to save a hundred bucks and the hassle to fit a SFX PSU in here, but some connectors are not standard. Luckily, I found an adapter for the mini-ATX 24 pin connector. The only remaining problem is the CPU connector.... the one on the HP PSU is 6 pin (No, it's not for a PCI card, but for the CPU). Basically, I need to convert the 6 pin CPU connector to a standard 4 pin. If you think it would be possible, please help me! Or if you think this will all blow up, fry, melt or catch fire please tell me! P.-S.: Here is the part list if you are curious