AMD’s AIB partners are ready to launch a new batch of AMD Radeon R9 390 with 4Gb of VRAM. The Radeon R9 390 is based on the 28nm Grenada Pro core which is a revised version of the Hawaii Pro core. Being similar in technical specifications to the Hawaii core, the Radeon R9 390 packs 2560 stream units, 160 texture mapping units and 64 raster operation units. The card has reference clock speeds of 1000 MHz core, 1500 MHz memory clock (6.0 GHz QDR) and has 384 GB/s bandwidth output. Both cards have a 275W TDP and are powered by a 8+6 Pin power configuration. Originally, the card packed a 8 GB, 512-bit memory design, but in a bid to offer more cost effective offerings, AIBs have prepped a wide range of 4 GB, 512-bit models. Below look into the official statement from AMD released when the cards launched:

Board Partners of AMD Prepare Cost Effective 4 GB Radeon R9 390 Models


AMD is pleased to bring you the new R9 390 series which has been in development for a little over a year now. To clarify, the new R9 390 comes standard with 8GB of GDDR5 memory and outpaces the 290X. Some of the areas AMD focused on are as follows:

Manufacturing process optimizations allowing AMD to increase the engine clock by 50MHz on both 390 and 390X while maintaining the same power envelope.

New high density memory devices allow the memory interface to be re-tuned for faster performance and more bandwidth:

  • Memory clock increased from 1250MHz to 1500MHz on both 390 and 390X.
  • Memory bandwidth increased from 320GB/s to 384GB/s.
  • 8GB frame buffer is standard on ALL cards, not just the OC versions.

Complete re-write of the GPUs power management micro-architecture:

  • Under “worse case” power virus applications, the 390 and 390X have a similar power envelope to 290X.
  • Under “typical” gaming loads, power is expected to be lower than 290X while performance is increased.