I never heard of this manufacturer before.
after some search. it appears that it's using google drive to store it's manual and bios files lol
here is the link of the manual of your motherboard :
https://drive.google.com/drive/folders/0B0rQog8BHa_ycVFKMmxnUnNlMGc
here is the latest bios 1.2 :
https://www.emaxxtech.com/bios/?wpfb_s=MCP61D3
before changing the CPU, update your bios
the manual says that the best CPU supported is the phenom 2 X4
no indication of a specific SKU / stepping though
so i checked on wikipedia :
https://fr.wikipedia.org/wiki/AMD_Phenom_II
lots of diferent phenom II X4 exists.
since your motherboard has weak power delivery, i advise you to search for a 65w cpu
that would be the phenom II X4 910e
i checked ebay
the price is around 50USD shipped
I put together a PC from scrap and spare parts for my nephew 2 years ago. a phenom II X4 + RX480 gpu. he was playing games like GTAV, no problem at all.
if my answer was helpfull, don't hesitate to select the "best answer" option