A little more L3 cache is another option if the non-G variants continue to use the full phat (Zeppelin successor) dies, however I think this is now unlikely as it would have a completely different CCX layout vs the G parts(Which is also likely a contributing factor to the 2XXXG parts faster CPU perf.) slightly higher clocks and maybe a £5 discount compared to a G part. I'm assuming the full-phat dies yields are now strong enough that all the 2+2 CCX dies can be used in the X500 part(2+2 is a requirement for the larger L3 cache) with lower 2XXX parts using APU-derived dies(With 1 whole CCX). Any large dies that don't meet the 1500 requirements can still go to Epyc parts.