Micron Technology has begun sampling its next-generation GDDR5X memory chips to customers. Micron is ready with chips in the 8 Gb (1 GB) and 16 Gb (2 GB) densities, making it possible for GPU makers to build graphics cards with 8 GB and 16 GB total onboard memory, respectively, over a 256-bit wide memory bus, by using just one chip per 32-bit channel.
The transition to GDDR5X from GDDR5 will be pretty easy for GPU makers as GDDR5X has a similar electrical layout and a similar BOM structure. GDDR5X will offer double the clock speeds of GDDR5 and will run at a lower voltage of 1.35V. Both AMD and NVIDIA have been reported to show interest in GDDR5X for their next-generation graphics cards.