We've previously disclosed that GDDR5X is targeting an end-game bit-rate of 14Gbps. Micron's initial low-volume samples have tested at 13Gbps, a 47% delta improvement over GDDR5's 8Gbps throughput. GDDR5X requires less power and outputs greater performance than current GDDR5.
Benchlife points toward nVidia's Pascal GP104 GPU as relying on off-die memory (GDDR5X, specifically) for its VRAM. This has not been officially confirmed by nVidia and remains under the “rumor” classification at this time, but we'd rate this one as highly plausible.
We'll be at GDC this week to hold conversations and interviews with AMD and nVidia both, and hope to continue this dialogue into April. More soon.
- Steve “Lelldorianx” Burke.