Question My Dell XPS Studio 8100 Got a huge problem i need help

[Harper Aarons]

so i used to play video games using a 10 year old macbook air i got a dell studio xps 8100 i tried replacing the i5 with a i7 and i soon found out the i7 wasnt compatable so i tried to put back the old cpu now the computer is slower than a school chromebook what do i do? also the fans are at 100% all the time please help! It went from 200 fps in minecraft to 20

 

[rgd1101]

did you replace the thermal paste?

 

[punkncat]

Was the i7 you tried the proper socket? IE could you have damaged pins on the mobo?

 

[Harper Aarons]

i just replaced mobo and its running faster than ever ty