Solidigm P41 Plus 1TB vs Western Digital WD Blue SN580 1TB
On the measures that settle this, Western Digital WD Blue SN580 1TB never comes out behind, and on at least one it comes out ahead.
| Specification | SolidigmP41 Plus 1TB | Western DigitalWD Blue SN580 1TB |
|---|---|---|
| Capacity (GB) | 1000 | 1000 |
| Sequential read (MB/s) | 4125 | 4150better |
| Sequential write (MB/s) | 2950 | 4150better |
| Current best price | $565.98at Amazon.ca · captured 2026-09-13 | $289.31betterat Newegg Canada · captured 2026-09-04 |
| Price per TB | $565.98 | $289.31better |
| Endurance (TBW) | 400 | 600better |
| Warranty (years) | 5 | 5 |
| DRAM cache | No | No |
| NAND type | qlc | tlc |
| Controller | Silicon Motion SM2269XT | WD Polaris MP16+ |
How these two compare
Sequential throughput
Solidigm P41 Plus 1TB is rated 4125 MB/s read and 2950 MB/s write; Western Digital WD Blue SN580 1TB, 4150 MB/s read and 4150 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
Solidigm P41 Plus 1TB lists at $565.98, or $565.98 per TB; Western Digital WD Blue SN580 1TB at $289.31, or $289.31 per TB.
Endurance
The makers warrant 400 TBW on Solidigm P41 Plus 1TB and 600 TBW on Western Digital WD Blue SN580 1TB — how much writing each is rated to take before the endurance clause lapses. Most desktop workloads never come close, so read the two against each other rather than as a limit you are likely to reach.
DRAM cache
Solidigm P41 Plus 1TB is DRAM-less; Western Digital WD Blue SN580 1TB 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: Solidigm P41 Plus 1TB uses QLC and Western Digital WD Blue SN580 1TB 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: Solidigm P41 Plus 1TB uses the Silicon Motion SM2269XT, and Western Digital WD Blue SN580 1TB uses the WD Polaris MP16+. 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: Solidigm P41 Plus 1TB carries a 5-year warranty, Western Digital WD Blue SN580 1TB 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 SN580 1TB. 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, Solidigm P41 Plus 1TB or Western Digital WD Blue SN580 1TB?
- Solidigm P41 Plus 1TB is rated 4125 MB/s read and 2950 MB/s write; Western Digital WD Blue SN580 1TB, 4150 MB/s read and 4150 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, Solidigm P41 Plus 1TB or Western Digital WD Blue SN580 1TB?
- Solidigm P41 Plus 1TB lists at $565.98, or $565.98 per TB; Western Digital WD Blue SN580 1TB at $289.31, or $289.31 per TB.
- Should you buy Solidigm P41 Plus 1TB or Western Digital WD Blue SN580 1TB?
- Western Digital WD Blue SN580 1TB. 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.