GDDR7
Graphics DDR generation 7. 28-32 Gb/s per pin (vs GDDR6's 18). PAM3 signaling (3 levels instead of NRZ's 2). Standard on Nvidia RTX 50 series (2025) + future AMD Radeon RX 9000.
Bandwidth gain: 384-bit GDDR7 (RTX 5090) = 1.5 TB/s vs RTX 4090's 1 TB/s GDDR6X. PAM3 delivers 50% more bits per cycle without raising clock frequency. Power-efficient than GDDR6X (less heat for same throughput). Manufacturers: Samsung, Micron, SK Hynix. Distinct from HBM3e (high-bandwidth memory): GDDR is cheaper, more modular; HBM is for high-end (H100, MI300X). RTX 50 launch (Jan 2025) was first large-scale GDDR7 deployment.