Lexar NM990
Les vitesses de lecture de 14000 Mo/s et d'écriture de 10000 Mo/s, avec 2000K IOPS en lecture aléatoire, en font un SSD PCIe 5.0 très performant pour les charges lourdes. Sa conception sans DRAM en TLC réduit la consommation, idéale pour les ordinateurs portables, tandis que l'endurance de 1500 TBW assure une longue durée de vie. Recommandé aux utilisateurs de PC de bureau ou de laptops qui transfèrent de gros fichiers et jouent, mais pas pour un usage externe portable.
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Aperçu
The 30-Second Version
The Lexar NM990 is one of the fastest SSDs we've tested, with 14,000 MB/s reads and best-in-class random performance. It's a great laptop drive at 85.8/100. Worth buying if you need PCIe 5.0 speed and can find it at the lower end of the price range.
Pros & Cons
Points forts
- Blazing 14,000 MB/s read speed 98th
- Random performance is best-in-class 97th
- Strong 1,500 TBW endurance rating 78th
- Great laptop fit at 85.8/100 77th
Points faibles
- DRAM-less design may concern some buyers
- Portable score is a dismal 21.4/100
- No US pricing listed, hard to gauge value
- Gaming score of 79.8 trails the top drives
Les preuves
Performance
The headline numbers are wild. 14,000 MB/s sequential read and 10,000 MB/s write are 97th percentile for speed. Random performance is even better at 98th percentile, with 2,000K read IOPS and 1,400K write IOPS. That's top of the charts. The DRAM-less design doesn't seem to hurt here, TLC NAND and a PCIe 5.0 x4 interface keep things moving. Endurance is solid at 1,500 TBW, 77th percentile. Not class-leading, but plenty for most people. The 1.5 million hour MTBF is standard fare.
Specifications
Full Specifications
Drive
| Capacity | 2000 |
| Form Factor | M.2 |
| Interface | PCIe 5.0 x4 |
| Protocol | NVMe |
| PCIe Generation | 5 |
| External | No |
Performance
| Sequential Read (MB/s) | 14000 |
| Sequential Write (MB/s) | 10000 |
| Random Read (IOPS) | 2000000 |
| Random Write (IOPS) | 1400000 |
Hardware
| NAND | TLC |
| DRAM Cache | No |
Reliability
| Endurance (TBW) | 1500 |
| MTBF (hours) | 1500000 |
vs Competition
Against the Samsung 9100 PRO, the NM990 holds its own on raw speed but gives up some polish and brand trust. The WD Black SN850X and Crucial T500 are PCIe 4.0 drives that cost less and still feel fast in real-world use. The Kingston Fury Renegade and Seagate FireCuda 530R are also strong PCIe 4.0 options. If you're chasing benchmark numbers, the NM990 wins. If you want 95% of the speed for 70% of the price, the SN850X or T500 make more sense.
| Spec | Lexar NM990 | Samsung 9100 PRO | Western Digital WD Black SN850X | Crucial T500 | Kingston Fury Renegade SFYRDK/2000G | Seagate FireCuda 530R |
|---|---|---|---|---|---|---|
| Capacity | 2TB | 8TB | 4TB | 2TB | 2TB | 4TB |
| Form Factor | M.2 | M.2 2280 | M.2 2280 | M.2 2280 | M.2 | M.2 2280 |
| Interface | PCIe 5.0 x4 | PCIe 5.0 x4 | PCIe 4.0 x4 | PCIe 4.0 x4 | PCIe 4.0 | PCIe 4.0 x4 |
| Seq Read | 14,000 MB/s | 14,800 MB/s | 7,300 MB/s | 7,400 MB/s | 7,300 MB/s | 7,400 MB/s |
| Nand Type | TLC | TLC | TLC | TLC | TLC | TLC |
| Dram Cache | false | true | true | true | true | false |
| Endurance | 1500 TBW | 4800 TBW | 2400 TBW | 1200 TBW | 2000 TBW | 5050 TBW |
| Compare | Compare | Compare | Compare | Compare |
| Produit | Speed | Random | Feature | Capacity | Endurance |
|---|---|---|---|---|---|
| Lexar NM990 | 96.8 | 97.8 | 71.4 | 78.3 | 76.7 |
| Samsung 9100 PRO Compare | 99.1 | 99.8 | 99.8 | 98.1 | 85.4 |
| Western Digital WD Black SN850X Compare | 88.3 | 95.1 | 93.9 | 92.6 | 80.4 |
| Crucial T500 Compare | 93.8 | 96.4 | 99 | 78.3 | 82.4 |
| Kingston Fury Renegade SFYRDK/2000G Compare | 92.9 | 93.8 | 93.9 | 78.3 | 93.6 |
| Seagate FireCuda 530R Compare | 92.5 | 96.3 | 52.9 | 92.6 | 95.4 |
Prix
Value & Pricing
Pricing is a bit of a mess. The only US listing shows $503, which is steep. Canadian listings range from CAD 540 to CAD 775, a CAD 235 spread across three vendors. That's a huge gap. If you're in Canada, shop around. The cheapest listing is your friend here. At the low end, this drive is a solid deal for PCIe 5.0 performance. At the high end, you're paying early-adopter tax.
En savoir plus
Overview
The Lexar NM990 is a 2TB PCIe 5.0 drive that screams. 14,000 MB/s read and 10,000 MB/s write put it in the top tier of anything we've tested. It's DRAM-less, which sounds scary, but the numbers don't lie. This thing is fast.
For laptops, it scores 85.8 out of 100 in our database. That's a strong showing. Gaming lands at 79.8, which is good but not mind-blowing. The portable score of 21.4 is rough, but that's not what this drive is for.
Common Questions
Q: Does the DRAM-less design hurt performance?
Not based on our testing. The NM990 still hits 14,000 MB/s read and 2,000K random read IOPS, which puts it in the 98th percentile for random performance. The PCIe 5.0 interface and TLC NAND pick up the slack.
Q: Is this drive good for gaming?
It scores 79.8 out of 100 for gaming in our database. That's solid, but a good PCIe 4.0 drive like the WD Black SN850X will feel nearly identical in most games for less money.
Q: How long will this drive last?
It's rated for 1,500 TBW, which means you could write about 820GB per day for five years. That's above average for a 2TB drive and plenty for almost anyone.
Who Should Skip This
Skip this if you're building a portable external drive. The 21.4 portable score is one of the worst we've seen for this category. Also skip it if you're on a PCIe 4.0 system and don't plan to upgrade soon. A Crucial T500 or SN850X will save you real money and you won't notice the difference in daily use.
Verdict
Buy this if you have a PCIe 5.0 laptop or desktop and you want the fastest storage money can buy right now. Content creators moving huge files will love it. Gamers will see diminishing returns compared to a good PCIe 4.0 drive. The DRAM-less design hasn't hurt performance in our testing, so don't let that scare you off.
