Hi IDC,
I read through the whole thread... phew...
Very very nice work explaining everything!
I do have a few questions to you before I start de-lidding my Haswell i5-4670k:
I plan to lap both IHS and Air cooler (Scythe Ninja 3) and delid the HW and use CLU on all 4 sides. I do not plan on taking it apart all the time but every 2 years or so I do like to remove the parts to do some dusting in the PC. after successful delidding I never plan to remove the IHS again.
I dont do this to gain 100-200mhz more, I just plan to do it because I think it will be a fun and rewarding experience (spent weeks on absolutely silencing my last computer with 500rpm fans and special hdd cases I had custom-made), I am fine with the reward of lower temperatures.
1.) do you know if the space between IHS and PCB is the same as on IB?
2.) You mention that you dont recommend any kind of shim between IHS and PCB, not even for protection as the PCB bends and this will most likely create a gap between die and IHS. I do believe you but I would still like to make sure the IHS will not come loose from the die, I know the die and the IHS will eventually bond a little but will that suffice? I do want to be able to take the CPU and be able (dont plan to but...) to send it via mail without it falling apart. What would you recommend? no glue at all, some kind of silicon/silicon glue and then the pressure from the retention bracket as well as the air cooler?
3.) do you consider it far more dangerous to delid haswell with the blade you used than with IB as the die is closer to the edges and more stuff is close to the edges of the IHS that can be damaged by the blade?
4.) any reason why I should lap before or after delidding?
5.) Ive never done any of this before, anything I have to know for lapping? I would just start with 400 (then 1000,2000,3000), put the sandpaper flat on a table and start moving the IHS back and forth with 90degrees rotations as you suggested, not sure yet on the cooler plate as I dont think I would move the whole cooler? would I just mount the sandpaper on a piece of wood and start lapping?
Thanks!