Western Digital WD_BLACK SN770 2TB vs Western Digital WD Blue SN5000 2TB
On the measures that settle this, Western Digital WD Blue SN5000 2TB never comes out behind, and on at least one it comes out ahead.
| Specification | Western DigitalWD_BLACK SN770 2TB | Western DigitalWD Blue SN5000 2TB |
|---|---|---|
| Capacity (GB) | 2000 | 2000 |
| Sequential read (MB/s) | 5150 | 5150 |
| Sequential write (MB/s) | 4850 | 4850 |
| Current best price | 477,82 €at Amazon.es · captured 2026-09-13 | 253,85 €betterat Amazon.es · captured 2026-09-13 |
| Price per TB | 238,91 € | 126,93 €better |
| DRAM cache | No | No |
| NAND type | tlc | tlc |
| Controller | — | Western Digital in-house Polaris 3 (4-channel, HMB) |
How these two compare
Sequential throughput
Western Digital WD_BLACK SN770 2TB is rated 5150 MB/s read and 4850 MB/s write; Western Digital WD Blue SN5000 2TB, 5150 MB/s read and 4850 MB/s write. These are peak sequential rates over PCIe — the speed you would see copying one large file. For boot, app launches and everyday feel, random access matters more than this headline figure.
Price
Western Digital WD_BLACK SN770 2TB lists at 477,82 €, or 238,91 € per TB; Western Digital WD Blue SN5000 2TB at 253,85 €, or 126,93 € per TB.
DRAM cache
Western Digital WD_BLACK SN770 2TB is DRAM-less; Western Digital WD Blue SN5000 2TB is DRAM-less. A DRAM cache holds the drive's mapping table — the index of where each block physically sits — so the controller places and finds data without an extra flash lookup. A DRAM-less drive borrows a little system memory (HMB) or a slice of its own flash instead, and is likelier to slow once a long run of random writes outlasts its fast cache.
NAND, controller and warranty
NAND: Western Digital WD_BLACK SN770 2TB uses TLC and Western Digital WD Blue SN5000 2TB uses TLC. The tier is bits per cell — SLC, MLC, TLC and QLC from one to four — trading density against endurance and sustained-write speed: QLC is cheapest per gigabyte, TLC the mainstream balance, and the denser the cell the sooner sustained writes taper. On the controller: Western Digital WD_BLACK SN770 2TB's controller is not stated, and Western Digital WD Blue SN5000 2TB uses the Western Digital in-house Polaris 3 (4-channel, HMB). It is the chip handling error correction, wear-levelling and where each write lands — much of how a drive holds up under load — even if the part number on its own tells you little. On the cover: Western Digital WD_BLACK SN770 2TB does not state one, Western Digital WD Blue SN5000 2TB carries a 5-year warranty. The length is the maker's own vote of confidence, and on an SSD it tends to track the endurance rating — a longer warranty usually meaning more rated writes.
Which to buy
Western Digital WD Blue SN5000 2TB. It gives up nothing to the other on the measures the site tracks and leads on at least one, so there is no trade to weigh — the sections above show where the margin is.
Common questions about this pair
- Which is faster, Western Digital WD_BLACK SN770 2TB or Western Digital WD Blue SN5000 2TB?
- Western Digital WD_BLACK SN770 2TB is rated 5150 MB/s read and 4850 MB/s write; Western Digital WD Blue SN5000 2TB, 5150 MB/s read and 4850 MB/s write. These are peak sequential rates over PCIe — the speed you would see copying one large file. For boot, app launches and everyday feel, random access matters more than this headline figure.
- Which costs less per terabyte, Western Digital WD_BLACK SN770 2TB or Western Digital WD Blue SN5000 2TB?
- Western Digital WD_BLACK SN770 2TB lists at 477,82 €, or 238,91 € per TB; Western Digital WD Blue SN5000 2TB at 253,85 €, or 126,93 € per TB.
- Should you buy Western Digital WD_BLACK SN770 2TB or Western Digital WD Blue SN5000 2TB?
- Western Digital WD Blue SN5000 2TB. It gives up nothing to the other on the measures the site tracks and leads on at least one, so there is no trade to weigh — the sections above show where the margin is.