4 minutes ago, Octavialicious said:
do u trust the neptwin? it says 159mm (my case supports 159mm exactly) the 212 Evo I have rn fits and is 159mm, but do u think I can trust their measurements?
Yes, the measurements can be trusted.
Usually, when measurements aren't exact, they're erring on the side of caution and there's more clearance available as opposed to less than stated.
3 minutes ago, Octavialicious said:
also its 16mm bigger width vs. mugen, so it will be closer to gpu. do u think there is enough clearance?
The width is 126mm which is less than the Mugen 5 Rev. B at 130mm. You're looking at the depth.