Saidian wrote on 2022-06-14, 20:43:
I'm a little confused here, I think the CPU fan is 80mm but I'm not 100% sure on the size of the fan that would fit in the rear case exhaust.
I think it might be 80mm as well?
In Dutch we have a saying: "Meten is weten" which literally translates to "measuring is knowing".
For holes of 8cm fan mounts in PC cases, the distance between them (the mounting holes in the case that is) is slightly over 7cm (yes I just measured it). Diagonally the distance between 2 mounting holes for a 8cm fan mount is 10cm (funfact 😋).
For older PC cases, the case fan sizes used are 6cm (very rarely and only the oldest ones typically used 6cm case fans), 8cm, 9,2cm (92mm that is) and 12cm. 14cm is more a thing of relatively more modern cases.
I don't think I ever seen 7cm case fans, but fans of that size were used for some CPU coolers for instance.
8cm and 12cm are the most widely used sizes in our cases. 12cm case fan mounting spots sometimes have an extra set of 4 holes for 9,2cm fans, but usually a 12cm fan will be the better pick.
Sometimes 9,2cm fan mounting holes also have 4 more mounting holes for 8cm fans but I've seen less of those compared to the 12cm/9,2cm combo. Expect to see lots of combos like these.