I'm not sure whether this one belongs here or in the cooling section, but I'll throw it out there.
I'm working on a watercooled i7 build. I bought a full board EK block for my little r3 gene. I had read somewhere that the block was discontinued because somehow it was keeping boards from powering up (after I bought it, naturally). I strapped it on and gave it a dry run to confirm, and to my dismay the news is true. Upon hitting my fancy ASUS start button the board will show activity for a fraction of a second, then ceased to do anything. If I remove the block everything works fine.
Can anyone think of a reason this is happening consistently with these blocks? EK suggests it may be a failsafe, perhaps related to pcb bending.
Yes, everything is grommet-ed and stood off of the board. Is it possible that the screws themselves are responsible? They're a bit bigger (in diameter) than the ones used to secure the stock heatsinks.
Another thing: The block is actually pushing on a nearby capacitor. It is bent back to the point where it is touching another capacitor. Would that create a short? The connections between the capacitor and the board aren't broken.