i tested this modules in the xperia s and have seen this running in person in the american sgs 3, from ATT i think, it uses the same SoC(CPU+GPU) the razr hd does, so in theory it should work.
yet, to confirm it works in the razr hd, it need testing. but as some devs said, it is a universal module, so it works with all S4 krait SoC based devices, same for the GPU OC(sorry, id seen it somewhere, but still didnt found it...)
Don't get me wrong, but I'm really offensive when I get offended with something.
Former SMARTPhones: Nokia E61, Moto Q, HTC P4351, Nokia N85, Moto Dext/Cliq(Morrison/MB200), Moto Atrix (Olympus/MB860), Sony Xperia S(Nozomi/LT26i), Samsung Galaxy S Advance(SII Lite/ i9070).