So I'm mostly considering the Macho 120 (not HR-02), but should I get the old version with a backplate or the new version without backplate ?.
I honestly havent seen the two versions you talk about, the Macho 120 is relative a new cooler, much newer than the HR02, the only version i seen is Thermalright Macho 120
, and seem to come with the same mounting mechansim as the HR02 macho with the backplate.
When I read that post, I was in doubt to reply as, according to me, this was the classical question to which you can't give a meaningful answer.
The newer Rev. A of the Macho 120 looks like more a simplification rather than an improvement over the original design: will it work at least equally?
I don't know: currently there isn't any reliable review of the TR Macho 120, and any review at all of the Macho 120 Rev. A
I also doubt there were any people around who have bought both the coolers: so what?
Usually a backplate is a safety measure for the board, usually in order to prevent some severe bending or cracking of the board itself.
Personally I doubt that any version of the Macho 120 will be effective to passively cooling an Ivy Bridge in a proper way, but it mostly depends of personal expectations: if SilentCold feel so, my advice is to buy the cheapest he may find.