My go to CPU to compare is the i5 2500 which way back then could push a trio of GPUs. You are going to push one GPU.
https://cpu.userbenchmark.com/Compare/Intel-Core-i5-2500-vs-AMD-Athlon-II-X3-440/m517vsm5315

The PSU might be just fine but I don't see the make/model so I can't check if it's single rail.
The Coolermaster is a single rail unit. Look at that +12V.
See http://assets.coolermaster.com/global/uploadfile/fileproduct_list/P16121200048ef0/PRDPIC/13_85d9f14cb5dd612a14336ca2fffebabd_1510299336.jpg