Actually, it maintains a solid 1600mhz if you simply undervolt it. It seems AMD were totally **** when it came to setting the vega up...
More power and heat, I saw the tests from Gamers Nexus. the card drew 400W from the PCIe lanes when overclocked and volted.
Damn it, why did they bother with that bloody Frontier Edition. Just leaves a bad taste in my mouth. It would have been completely fine if they Never once mentioned gaming, gaming modes, or drivers for it.