Not sure how to vote. Not what I would call a 100% success, but the CPU seems to work.
Ivybridge 3570K has been installed for a while under a closed loop watercooler. (H80 I think. Can't remember) was always planning to delid, properly watercool and properly OC. (was not happy enough with OC temps under the H80 to really push it with that cooler.)
Anyway, the custom cooling stuff finally arrived and delid day came.
Tried the hammer and vice method, but no joy, the IHS just simply refused to move, care, patience and precision would not make it move, care, patience, precision and force also failed. Once the pcb started showing signs of separation and the IHS itself was starting to look like it had impact damage I decided to sleep on it and go fetch some razors the next day.
Convinced the chip was almost certainly dead and resigned to buying a new CPU I tried a scalpel from an art store, this appears to have nicked the pcb, tiny glitter of something shiny in at least one place, maybe 3.
Old fashioned razor blades can NOT be found in bricks and mortar stores here in Sweden, but I actually found some kind of scraper blade that is not much thicker than a razor and thinner than a Stanley knife blade and also came with a handle. (they are double sided exactly like razors, but not as thin and or flexible.)
With a rocking motion, and avoiding the lifted edges of the pcb (from the failed hammering) I got the IHS off pretty quick and very safely.
On closer examination, once cleaned up it looks to me like the silicon glue had sucked down real tight and was never going to shear with the hammer. Also, once I had cleaned it up with some isopropyl alchohol I could see one nick through to copper and maybe another two visible only with magnifying glass when wet with cleaner.
My longer term plan is to go direct die, but for now I had to do a rough lapping of the IHS just to fix the damage the vice had done.
(I only had access to 1200 grain paper, so its not the best lapping job ever.)
Its back in the rig under the H80 for a quick test and apparently working!
Will pull the IHS out again for proper lapping and see what the temps look like with a proper water cooling solution.
If I do this again. (and I probably will) I will go direct to blade. The hammer is just not working for me.