So I'm hoping to re-use an old power supply that was pretty decent at the time (12 years ago) but I'm not sure that I have the correct connectors on it that I'll need. It is an Antec Earthwatts EA-500d. I'm wondering if this is compatible with the Asus Prime z490-P and MSI MPG Z490 Gaming Edge motherboards. The MSI is especially confusing me because I'm not sure if a 8+4 pin connector is the same as 2 separate ATX and EPS connectors.
Below is a link to the PSU I have and the two motherboards I'm looking at (there's another version out there but this is the exact one). These motherboards seem to require 8 and 4 pin CPU connectors. My PSU does have 8 and 4 pin connectors but I'm not sure if they are what I need (having doubts given how old my PSU is). I've built several computers but not an expert and looking for advice.
Goal right now is to keep costs cheap - no dedicated graphics card for now. Will upgrade GPU later if need be. But I don't want to throw something inferior in and blow something up.
https://www.amazon.com/Antec-EA-500D-Earthwatts-4-Pin-Supply/dp/B0084EQRKG
Connectors:
20+4
6 pin pci-e x2
4 pin - I'm not sure what this one is
8 pin - I'm not sure what this one is
I found this link which says these are 4 pin ATX and 8 pin EPS connectors:
the620guy.com
Motherboards:
Asus Prime z490-P - https://www.newegg.com/p/N82E16813119272
MSI MPG Z490 Gaming Edge - https://www.newegg.com/p/N82E16813144302
Below is a link to the PSU I have and the two motherboards I'm looking at (there's another version out there but this is the exact one). These motherboards seem to require 8 and 4 pin CPU connectors. My PSU does have 8 and 4 pin connectors but I'm not sure if they are what I need (having doubts given how old my PSU is). I've built several computers but not an expert and looking for advice.
Goal right now is to keep costs cheap - no dedicated graphics card for now. Will upgrade GPU later if need be. But I don't want to throw something inferior in and blow something up.
https://www.amazon.com/Antec-EA-500D-Earthwatts-4-Pin-Supply/dp/B0084EQRKG
Connectors:
20+4
6 pin pci-e x2
4 pin - I'm not sure what this one is
8 pin - I'm not sure what this one is
I found this link which says these are 4 pin ATX and 8 pin EPS connectors:

Antec EA-500D Earthwatts 500W 20+4Pin 4-Pin 2x PCIe 80 PLUS PFC ATX Power Supply - The620Guy.com
Antec EA-500D Earthwatts 500W 20+4Pin 4Pin 2x PCIe 80 PLUS Certified Active PFC ATX Power Supply Specifications • Brand: Antec • Model: EA-500D • Series: Earthwatts • Type: ATX12V v2.2 • Maximum Power: 500W Continuous Power • Fans: 80mm low noise cooling fan • PFC: Active • Input Voltage: 100 –...

Motherboards:
Asus Prime z490-P - https://www.newegg.com/p/N82E16813119272
MSI MPG Z490 Gaming Edge - https://www.newegg.com/p/N82E16813144302