Samsung Unveils LPDDR5X-PIM: 614GB/s In-Memory Bandwidth
jedisct1 · x · 2026-08-29
Samsung showcased its Processing-in-Memory (PIM) technology at Hot Chips 2026. By integrating MAC units directly into LPDDR5X chips, the technology exploits high internal bandwidth and avoids latency between DRAM and compute cores.
Key Specs:
- Internal Bandwidth: 614 GB/s by accessing all 16 banks in parallel.
- External Limit: Standard DRAM maxes out at 76.8 GB/s due to interface constraints.
- Architecture: Each bank has a PIM block with a MAC tree and register files. Software loads model weights into DRAM.
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