The Asus Strix R9 390X Gaming 8G OC boasts a core clock of 1070MHz (20MHz factory OC) with 8 Gigabyte of GDDR5 running at 6000MHz and pushing that memory across a 512-Bit wide bus. The GPU is equipped with a tweaked out Hawaii Core now named Grenada and is based on a 28mm fab on a large 438mm2 Die containing 2816 Shader Processors and a whopping 6.2 Billion Transistors.
To clear up any misconceptions the R9 390X is based on the Hawaii GPU released late in 2013, the silicone used is the same but with enough tweaks to warrant the new name Grenada. The Asus Strix R9 390X has 8 Gigabytes of memory. While it is based on the Hawaii core Grenada is more like a distant cousin than a reiteration of R9 290x and you should see as much as a 10% increase in performance over R9 290X and in the GPU world often 10% is a completely new model.
