WD_BLACK SN850X 4TB
PCIe 4.0 NVMe, up to 7,300 MB/s read: a 40GB model file (70B at Q4) loads in roughly 7s from a cold cache. 4TB holds ~88 such models. Not a VRAM substitute: llama.cpp mmap or DeepSpeed/accelerate NVMe offload streaming weights from SSD is 10-100x slower than VRAM or RAM, so only for experiments. Cooling: a simple M.2 heatsink (most boards include one) keeps sustained reads at full speed.
Specs: PCIe 4.0 x4 NVMe, M.2 2280 · seq. read 7,300 MB/s · seq. write 6,600 MB/s · 2,400 TBW · DRAM
Specs: official spec page
WD / SanDisk · ssd · 4000 GB · tags: ssd, nvme, pcie4, 4tb
EU / DE trend
US trend
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History points
| Date | Region | Condition | Median | Source |
|---|---|---|---|---|
| 2026-10-16 | DE | new | €782 | mindfactory |
Accepted offers (1)
| Title | Price | Region | Source | Trust | Fresh | vs median |
|---|---|---|---|---|---|---|
| 4TB SanDisk WD Black SN850X M.2 PCIe NVMe 3D-NAND TLC (WDS400T2X0E) Details new · 2026-10-16 | €782 | DE | mindfactory.de | high | fresh | 100% |