Solidigm P41 Plus 1TB vs Western Digital WD Blue SN580 1TB
The site holds no current price for at least one of these, so what follows compares specifications alone.
| 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 | — | — |
| Price per TB | — | — |
| 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.
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
With a price missing for at least one side, there is no cost verdict to give. What separates two otherwise-similar drives is up in the sections above — sustained and random behaviour, whether there is a DRAM cache, the flash tier and the warranty — so weigh those against what your build needs.
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.
- Should you buy Solidigm P41 Plus 1TB or Western Digital WD Blue SN580 1TB?
- With a price missing for at least one side, there is no cost verdict to give. What separates two otherwise-similar drives is up in the sections above — sustained and random behaviour, whether there is a DRAM cache, the flash tier and the warranty — so weigh those against what your build needs.