A SeaHawk X w/ Micro can run at 9598 Mhz without sacrificing stability or introducing incorrect shares on ETH as well as ZEC.  Do note that shares no longer validate on XMR @ this frequency using CCminer and that MSI afterburner restricts the card from surpassing the 9598 Mhz barrier.

My MSI 480s are slightly behind at 9400 Mhz on all algorithms previously mentioned algorithms although my modules are set at 9200 Mhz for the sake of safety as 9600 Mhz immediately hangs the system.

I will shortly have access to a thermal camera but until then, the only strategy left at my disposal is to estimate that the temperature of my memory modules on air-cooled cards are operating at 20*C higher than that of my GPU as this proves to be applicable in most cases.