Good day mga bossing,

I have a old GT520 Video Card, that recently didn't work on my Desktop, i bought a new GT710 as replacement, and it now shows display.

The Old GT520 Video Card, i installed in a new computer, and suprise it showed display.
When i tried to use the GT520 again on the Old computer, again no display.

My question, what could be the problem of my old video card? Thank you