I bought a PNY GeForce 512MB GDDR3 card and it worked BUT?!

Oh man, I went through it again yesterday didn't I? I thought to myself, if I could make a GeForce card work why settle for the 512 when for 10pounds more I could have a 1GB? I arranged for the Radeon card to be collected, uninstalled the new card, took it back and bought this. ZOTAC GeForce® GTS 250 Eco 1GB
and brought it home, and nothing, no bloody screen so I thought there is one last thing I never tried before. On the back of my comp there is a small black plate that says “Do Not Remove” well removed it and there was a VGA port, A BLOOODY VGA PORT!!!!!
I put my old card back in>fired up my comp> switched to onbard graphics> turned on my comp (mind you I have two monitors) so this would not have been successful without two> so I powered down, installed the new card> powered up> installed the card with the onboard still working>installed the drivers but, Error> “there is a problem.....yadda yadda yadda, VGA not compatible” HMM
SO VGA means the onboard, so I powered down, turn off the onboard graphics and VOILA!!!!!!!!!
I am now a working graphics card owner STUPID STUPID STUPID!!!
If I had done this in the very beginning I would be running DDR5 and DX11 - maybe
so as a Sadist, do I try this system with the Radeon card?!?! NO
I am going to leave it lol if I had the 1GB card here I would so, happy happy joy joy :D

my Zotec card is amazing and after over 9000 forums and help pages, I myself have sorted it out :D