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
Hello, I would like to tell me your opinion on the subject below ...
i have a processor AMD Athlon II X3 440 Rana 45nm Technology,
ram 8.00GB Dual-Channel DDR2 @ 335MHz (5-5-5-15)
Gigabyte Technology Co. Ltd. GA-MA785GM-US2H (Socket M2)
550 watt power supply ... I will change it and buy the Coolermaster MasterWatt Lite 600W (MPX-6001-ACABW-EU)
... I ask you: does my cpu handle the graphic card I want to buy?
= Asus GeForce GTX 1050Ti (TiPH-GTX1050TI-4 DDR5B);
......thanks.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic