Computer is Stuck

[afterx]

I am sorry, my English is not good. I have a video card on my system. I bought it 4.5 years ago. but now windows is not opening. is stuck on the splash screen. but when I connect it to the built-in onboard graphics card, windows opens. I'd try:
Bios update
Bios reset (with battery)
Check memory with memtest
HDD check with Seatools

 

[RARRAF]

probably PSU
And here's my pc specs:
CPU:
Motherboard:
RAM:
GPU:
HDD:
PSU make and age:
OS:
HWINFO from here https://www.hwinfo.com/download.php

 

[afterx]

CPU:AMD FX-6100 3.30
Motherboard:Gigabyte GA-880GM-D2H rev 4.0
RAM: Kingston 8 GB DDR3 1333 MHZ
GPU:Zotac GTX650ti 1 GB
HDD:Seagate ST1000DM03-1CH162
PSU:Highpower Bronze Element 700 W +80

Motherboard 5,5 year , other devices 4,5 year.

 

[RARRAF]

as I said before its probably the PSU as it is the most power hungry device in the PC works fine without it buy a new PSU here are some recommendations PSU Tier list tier 1-2 are good for gaming

http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html
I would recommend an EVGA SuperNova Gold G2 / or new G3 /GS / GQ, Platinum P2 / PS, or Titanium T2 or a Seasonic M12-II Evo or S12-II
GOOD PSU EVGA is a B2, G2, G3, P2, GS, PS, or T2. Avoid the EVGA B1 and G1 series/ I bought a EVGA G3 with 7year garentee

 

[afterx]

as I said before its probably the PSU as it is the most power hungry device in the PC works fine without it buy a new PSU here are some recommendations PSU Tier list tier 1-2 are good for gaming

http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html
I would recommend an EVGA SuperNova Gold G2 / or new G3 /GS / GQ, Platinum P2 / PS, or Titanium T2 or a Seasonic M12-II Evo or S12-II
GOOD PSU EVGA is a B2, G2, G3, P2, GS, PS, or T2. Avoid the EVGA B1 and G1 series/ I bought a EVGA G3 with 7year garentee

I tried some things before I changed PSU. another graphics card worked on my computer. also my screen card worked on another computer. I need to change the video card or motherboard. Is it worth it?

 

[RARRAF]

well you need a GPU on any PC but as for motherboard up to you.