changing from a GT 640 to a HD 7750 but with the new card it won't boot

Connor_Six

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Oct 6, 2013
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10,510
i was very careful swapping the two cards so i'm sure i didn't damage it. i'm using the original GT 640 card right now but when using the 7750 card the computer turns on but there's nothing on the screen. is this an issue with the drivers or do i have a dud?

also worth noting i have a 380w power supply and only room for one graphics card on my motherboard.

thank you in advance
 

Connor_Six

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Oct 6, 2013
3
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10,510


i'm using a asus prebuilt so i doubt there's any bios updates to be found. also when my 7750 was plugged in i tried booting with the port for that igpu but it didn't work on that either. oh yeah and my igpu is intel based from a third gen i5 cpu
 

Connor_Six

Honorable
Oct 6, 2013
3
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10,510
for the record i have no AMD drivers on my computer at this time. i've tryed installing them without the card in my computer but from the file i downloaded from the website and the cd that came with the card have not let me do a full install of the drivers. i'm assuming that's because it'd overwrite my nvidia drivers, right?