if I don't get my IPC fix, I'll just ADD MOAR CORES YO!
If I get X99, I'm considering continuing to use my 7950 in the new build until spring, when pascal and Fury2 come out. Given how the R9 380X is just an R9 280X, and a 280X is pretty much a 7970GHz, I'm pretty sure I can get my 7950 above that. I haven't had it overclocked for a while and I didn't fully validate it, but I had the card over 1250MHz with only very minor voltage tweaks running the afterburner stress test for half an hour.