Lexar NM790 SSD 4TB PCIe Gen4 NVMe M.2 2280 Internal Solid State Drive, Up to 7400MB/s, Compatible with PS5, for Gamers and Creators (LNM790X004T-RNNNU)

The Lexar NM790 is relatively unknown and yet for everyday workloads it's possibly the fastest NVMe PCIe 4.0 drive currently available. It's also cheaper than competitors at this performance level, which would be drives like the WD Black SN850X and Samsung 990 Pro. I have 4TB models of all these drives. The SN850X was the king of game loading times and general gaming performance. But not any more, this Lexar just about beats it. Although all these drives are so fast that even in the absolute best case scenario you're likely looking at the NM790 loading just 1 - 2 seconds faster. I've attached an image from TechPowerUp (they have a great review) showing the NM790's overall performance. It's tied with the 990 Pro for the fastest Gen 4 drive they've tested, only beaten by a Gen 5 drive which is just 1% faster. The 990 Pro is faster with synthetic benchmarks, but for actual everyday workloads the NM790 is at least equal. The Crystal DiskMark benchmark is my own, but being as this is a synthetic benchmark it isn't all that useful apart from showing that the NM790 hits the advertised sequential read/write speeds. So why buy a SN850X/990 Pro when this Lexar is cheaper? Well some exceptions would be extremely heavy workloads that hammer the drive for many hours non-stop with reads/writes (and no this definitely doesn't include gaming). The reason is that the NM790 has no DRAM cache so eventually it will slow down under these conditions, but for the vast majority of people they will never get close to this happening. In general the NM790 deals very well with the fact that it lacks any DRAM cache, far better than most cache-less drives, so i've never run into this problem even when copying many hundreds of gigabytes. The reason it can still compete with more expensive DRAM cache based drives is because the NM790 uses a new Maxiotech controller, plus newer faster NAND flash memory that typically goes into Gen 5 drives. Like all of the fastest Gen 4 drives it gets hot, but certainly not as hot as the overpriced and almost pointless Gen 5. But you may have to point a fan at it if your case isn't well ventilated (like if you use water cooling). When the NM790 hits 70C+ it will begin to throttle speeds. This stops it from getting much hotter, and because of this some tech reviewers have mistakenly assumed that this drive has good thermal performance, but it's simply because it's throttling speeds. It actually gets hot quite easily and needs good cooling to stay under 70C. The drive works well with my Sabrent Rocket NVMe Heatsink (SB-GHSK), which only reaches 52c during stress testing and ~36c idle. It's also one of the most power efficient drives currently available. Vastly better than the SN850X and a good amount better than the 990 Pro, so it's excellent for laptops... At least if you don't care about heat. Another benefit of the NM790 is that it's single sided, in all sizes including 4TB. Meaning it's physically thinner because the NAND flash memory chips are only on one side of the PCB. This makes installation more compatible with heatsinks/laptops/consoles. And i wasn't going to mention endurance/lifespan because this is a non-issue for 99.99% of people. I was an early adopter of SSD's, i had the very first ones on the market, and i've never had an SSD/NVMe fail from endurance problems even though my PC's are powered on 24/7. If any type of SSD fails it will almost certainly be because of a fault or something else, not because the memory has worn out from too many writes. But if you still actually care... The 4TB NM790 is rated for 3000 TBW (TerraBytes Written) which means that it can write that much data to the drive before it may fail. This is a good rating and once again it's better than the competition mentioned here. The 2TB is rated for 1500 TBW and the 1TB is 1000 TBW. Again these are pretty good numbers. For comparison, both the SN850X and 990 Pro are 600 TBW (1TB), 1200 TBW (2TB), and 2400 TBW for the 4TB models. To sum everything up: If i could buy my all my NVMe drives over again, i wouldn't bother with the SN850X or 990 Pro. I'd just get several NM790's instead.

Great price for a huge SSD. Been running fine inside an ASU’s G14 2024 since purchase. Temps running fine, no issues whatsoever. Speed is perfect and aligns with the G14’s bus. Remember to check you machine’s m.2 speeds. No point in buying a high end SSD when something like this will max it out. Note: this is a Single Sided SSD. Perfect for the G14!

These were purchased to boost the storage of my Asustor NAS did the job perfectly and was good value for money

Amazingly fast and easy to install in a PS5. 4TB SSD really pleased with the results. Highly recommend.

Bought this to replace my 4tb HD which gave up the ghost and died on me so bought the M2 4TB space saver, will buy an SSD 4 tb later on , speedy delivery next day great buy.

Great drive (using for OS and games), reviews seem to rate it highly. Doesn't suffer too much that I've noticed from lack of DRAM cache, while drives with one are priced a lot higher

Excellent all round for gaming on PC.

Bought November 2025. Failed April 2026. 5 months. Can't find warranty details. Avoid

Schneller guter Speicher. Habe schon den zweiten Speicher für Laptop und PC.

Good product. Faster speeds. Excellent quality. Already buy 2 time with seller. Thanks you seller

This is fast compared to SATA. I have each and this out performs the SATA version by about 25% in my tests. Be careful if you plan to put it in a USB case. It's thick and doesn't fit inside some of them.

I've been looking at getting a larger NVMe SSD for a year or so now but prices have largely remained steady up until Fall off this year when they really started to get more affordable. This is replacing an older Gen 3 MP510 960GB. I was getting rather tired of having to pick and choose what I wanted installed on the drive. I picked the Lexar after reading numerous reviews and seeing nothing but positives. It's TLC based drive unlike most of the others around this price point for 4TB models. QLC drives have their own issues, the most concerning being longevity, as their NAND is much more easily worn out and typically do have any DRAM so in heavy or intense workloads they can drop to speeds like that of normal mechanical hard drive. It's got a rather high endurance rating, over twice the 1400 TBW of the drive out replaced. This was another reason for getting this as I don't have to worry about the drive failing due to exhausting the endurance. I'm sure I'll be looking gone before the drive would fail. One incredible thing is that Lexar managed to get all 4TB on a single side of the NVMe. Most drives they're on both sides making it harder to cool. My only con is that it does run quite warm. It does sit under my GPU and in general, idling on the desktop it can sit in the 50's. If your motherboard doesn't have a heatsink, you'll want to pick one up. I can't imagine how much worse it could be if I didn't have 2 140mm intakes on the side above the GPU blowing air down onto the board. I did buy a heatsink but have not yet installed it so I'll likely be looking at around a drop off 10-15C or more. If the extra $15-20 for the heatsink model didn't bother you, go that route. I will say I am hampering the drive as the m.2 slot it occupied is only a PCIE Gen 3 so it won't ever hit it's true speeds, but when I tested it, it was hitting the limit of the maximum bandwidth. I was getting identical read and write speeds capping out around 3500MB/s, a little less than half what the drive is capable of. If you're looking for speed, endurance, size options and a good price, the Lexar is the way to go. They've been in the storage game for a long time and have always been reliable for flash based storage

It’sa good drive cannot fault it seems really fast compared to some others