2

I got my hands on an old PC heat sink, intel 775 I think.

Will this fit on my i5-8400 8th gen?

And if it does, what side does it go on?

The copper core is indented on one side and sticks out the other

enter image description here

enter image description here

  • The side with the copper protruding from the aluminium fins goes on the CPU, otherwise it could not make contact. Normally, these heatsinks come with a mounting mechanism. This -missing- part determines which socket it can fit. One could certainly cobble together a solution to make this work on Socket 1151. It is still missing a fan though, which would normally be attached to / a part of the plastic mounting mechanism. Overall, not worth the effort compared to working solutions starting at 5$ plus shipping. – user13807 Apr 9 at 21:55
  • Thanks for answering what side it fits ;) – Bruno Vincent Apr 10 at 2:14
1

It isn't going to fit.

The LGA 775 socket CPUs are a different form factor, 37.5mm square, than the i5-8400 which uses an LGA 1151 socket.

The distance between the screw-holes for the heatsink of an LGA 775 is 72 mm. Such heatsinks are not interchangeable with heatsinks for sockets that have a distance of 75 mm, such as the i5-8400 which uses the LGA 1151 socket.

| improve this answer | |
  • 1
    Thanks for the clear answer, I asked on Facebook groups, and just got a whole bunch of snotty millenial kids giving me different opinions on this! Great to get an answer from a guy who knows what he's talking about, cheers! – Bruno Vincent Apr 10 at 2:12

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.