computer freezes at BIOS after installing a new video card

The Dude

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Feb 23, 2014
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i just installed a new gtx 750 on my HP desktop pc (biggest mistake i made is that i bought a prebuilt PC), and everytime i turn the computer on it freezes at the very first bios screen, and after about 30 seconds i hear a beep, and when i remove the card and intall my old one it works fine, even with no discrete card it works really fine
i tried tons of solutions but nothing works, updated the bios (the update isn't that new it's from 2011), i tried to disable secure boot but i couldn't find the option in the bios
if you have any idea about how to fix this please help
thanks in advance
 

The Dude

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Feb 23, 2014
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18,640
after searching on the forums for similar problems, i found out that OEM manufacturers lock their motherboards to the original hardware, and while you can upgrade RAM and Hard disk because thay're all basically the same, you can't upgrade the graphics card, except if you disable secure boot, which is not available on my BIOS, i don't know wether this is true or not, but it sounds logical