3 different new PSU's won't turn on my computer, but the old one does every time.

[APTech]

Alright everyone I'm at my wits end here trying to figure out an issue. I recently upgraded to a 3080ti, and when I picked that up I picked up an 850w PSU knowing my 650 would struggle. However upon installing would only get the motherboard to light up as well as my keyboard and streamdeck. Thinking I got a bad PSU since I plugged my old one in and it worked I bought another PSU and same thing. So I exchange that one for a new one and even though it tested good still have the same thing. Any help would be appreciated.
First brand was a Powerspec from micro center, the past 2 are Corsair Rm850x.  The Original PSU is an EVGA 650GQ. Motherboard is an Asus ROG Strix Z490-f gaming.

I did try unplugging the PSU, and clearing the CMOS but no luck there either.

 

[--SID--]

You only use the cables that come with the new PSU?

[APTech]

I didn't use them all at the time.  The powerspec is definitely bad as i retested it and it wouldn't work.  I had left the sata cables in because of everything connected.  When i booted without them plugged in on the Corsair it worked.  As soon as I put them in, it wouldn't boot.  I took the time to replace those as well and everything works fine.

[Skiiwee29]

The PSU cables are not cross compatible. The pin outs are different from brand to brand and will cause damage to the PSU and components. 

[APTech]

Yeah, I hadn't really heard that before a friend of mine mentioned it to me today.  Thankfully no damaged caused to this one and everything is working fine now.