Disappointed at the $729.99 Newegg.com pricing of the Radeon R9 290X? No worries. AMD's second SKU based on the "Hawaii" silicon could be lighter on the wallet. Japanese retailers leaked the specifications sheets of both the upcoming R9 290X, and its lighter sibling, the R9 290 (non-X). Specifications of the R9 290X match rumors. The chip features 2,816 stream processors, up to 1000 MHz of GPU clock, single-precision floating point performance of 5.16 TFLOP/s, and 4 GB of GDDR5 memory across a 512-bit wide memory interface, clocked at 5.00 GHz, yielding 320 GB/s of memory bandwidth. The R9 290, on the other hand, features 2,560 stream processors, up to 948 MHz GPU clocks, 4.9 TFLOP/s single-precision floating point performance, and the same memory subsystem as the R9 290X. Both cards feature an identical combination of power connectors, 8-pin PCIe and 6-pin PCIe. Both feature hardware support for DirectX 11.2, OpenGL 4.3, and Mantle.