R9 270X - > 487 KH/s (GV-R927XOC-2GD)
Have your Gigabytes been running smooth ... low HW errors, low rejects, and good stability?I heard they're very close in comparison to the Sapphires, but most of what i read said, for the 270X series, to go for the Vapor-X or Toxic Sapphires, then the Gigabyte was a close second.
... but it really depends on the price and availability at the time.