Premium DRAM versus HMB value comparison
Samsung 990 PRO 2TB vs Lexar NM790 2TB
The NM790 comes unusually close in headline read speed and often competes aggressively on price. The 990 PRO justifies a premium through dedicated DRAM, stronger random ratings and Samsung’s ownership ecosystem.
990 PRO for premium mixed work; NM790 for aggressive value
The current price gap and host decide whether dedicated DRAM and Samsung Magician are worth more than the NM790’s efficiency, single-sided layout and higher TBW.
Current matching 2TB offers
Lexar 2TB NM790 Internal NVMe SSD, 7400/6500 MB/s, M.2 2280, PCIe Gen 4x4
New · Bare or cooling unverified · Amazon.com
Lexar 2TB NM790 NVMe SSD w/Heatsink, 7400/6500 MB/s, M.2 2280, PCIe Gen 4x4
New · Factory or included heatsink · Amazon.com
LEXAR M.2 2TB PCIe Gen 4X4 NM790 NVMe SSD
New · Bare or cooling unverified · Bleepbox US
Samsung Internal SSD 990 2TB, Read/Write Speeds Up to 7,250/6,450 MB/s
New · Bare or cooling unverified · Amazon.com
SAMSUNG Samsung 990 PRO 2TB, 3-bit TLC V-NAND, M.2 (2280), NVMe 2.0, R/W(Max) 7,450MB/s/6,900MB/s, 1,400K/1,550K IOPS, 1200TBW, 5 Years Warranty
New · Bare or cooling unverified · kooldeal68
Samsung 990 PRO NVMe M.2 SSD, 2 TB, PCIe 4.0, 7,450 MB/s Read, 6,900 MB/s Write, Internal SSD, for Gaming and Video Editing, MZ-V9P2T0BW
New · Bare or cooling unverified · Stavvy Sales
Samsung 990 PRO 2TB PCIe Gen 4.0 x4 (Maximum Transfer Rate 7,450MB/s) NVMe M.2 (2280) Internal SSD MZ-V9P2T0B-IT/EC
New · Bare or cooling unverified · All About Office
Samsung 990 PRO Heatsink Model, 2TB PS5 Operation Verified, PCIe 4.0 (Max Transfer Rate 7,450 MB/s), NVMe M.2 MZ-V9P2T0G-IT/EC
New · Factory or included heatsink · SiliconValleySeller (SN# Recorded)
Samsung 2TB 990 PRO with Heatsink PCIe Gen4 NVMe M.2 2280 Up to 7450 MB/s, 6900 MB/s
New · Factory or included heatsink · SiliconValleySeller (SN# Recorded)
Amazon prices and images are checked on a 24-hour cycle. Latest offer check: 2026-08-22 12:38:09 UTC. Price and availability may change; Amazon at purchase time controls.
Samsung 990 PRO 2TB versus Lexar NM790 2TB
| Specification | 990 PRO 2TB | Lexar NM790 2TB |
|---|---|---|
| Interface | PCIe 4.0 x4, NVMe 2.0 | PCIe 4.0 x4 NVMe |
| Sequential read | Up to 7,450MB/s | Up to 7,400MB/s |
| Sequential write | Up to 6,900MB/s | Up to 6,500MB/s |
| Random read / write | Up to 1.4M / 1.55M IOPS | Up to 1.0M / 900K IOPS |
| Cache architecture | 2GB LPDDR4 DRAM | HMB 3.0 |
| Endurance | 1,200TBW | 1,500TBW |
| 2TB layout | Verify selected model | Single-sided in current product sheet |
| Warranty | Five years or TBW limit | Five-year limited warranty |
990 PRO versus NM790 value calculator
Enter current 2TB prices and choose the host and workload.
Premium DRAM meets a fast HMB design
The 990 PRO 2TB uses 2GB of dedicated LPDDR4, whereas the NM790 2TB uses HMB 3.0 and is designed as a single-sided value-oriented Gen4 module. Their sequential read labels are almost identical, but the cache and software ecosystems are not.
The 990 PRO-versus-NM790 decision uses premium dram meets a fast hmb design to test whether dedicated DRAM and Samsung’s management ecosystem justify a premium over a fast single-sided HMB alternative.
Decide whether the workload benefits from local DRAM or whether lower cost and simple physical fit dominate. Compare seller confidence and the exact 2TB configuration alongside price, because a very low listing can erase the apparent value advantage if the model is ambiguous.
- The 990 PRO uses dedicated DRAM
- NM790 uses HMB 3.0
- Peak read ratings are very close
Headline read speed is effectively a tie
Samsung advertises up to 7,450MB/s read and Lexar up to 7,400MB/s for the 2TB models. That 50MB/s difference is smaller than normal variation caused by slot routing, test method, temperature and background activity. Write and random ratings provide more separation.
The 990 PRO-versus-NM790 decision uses headline read speed is effectively a tie to test whether dedicated DRAM and Samsung’s management ecosystem justify a premium over a fast single-sided HMB alternative.
Treat both as top-tier Gen4 readers and move the decision to architecture and price. Compare seller confidence and the exact 2TB configuration alongside price, because a very low listing can erase the apparent value advantage if the model is ambiguous.
- Use Gen4 x4
- Match test settings
- Do not infer authenticity from one run
Write and random ratings favor Samsung
The 990 PRO reaches a published 6,900MB/s write with 1.4M/1.55M random read/write IOPS. Lexar lists 6,500MB/s and 1.0M/900K IOPS. Those differences support the PRO in mixed and write-heavy activity, but a light gaming machine may not expose them clearly.
The 990 PRO-versus-NM790 decision uses write and random ratings favor samsung to test whether dedicated DRAM and Samsung’s management ecosystem justify a premium over a fast single-sided HMB alternative.
Use the PRO ratings when the workload genuinely includes concurrent or metadata-heavy operations. Compare seller confidence and the exact 2TB configuration alongside price, because a very low listing can erase the apparent value advantage if the model is ambiguous.
- Higher Samsung random figures
- Both remain fast
- Low queue depth can narrow gaps
NM790 value is more than a cheap price
Lexar combines high sequential performance, HMB 3.0 and a single-sided 2TB layout. That package can suit laptops, compact PCs and budget-conscious gaming systems where DRAM-backed premium behavior is not essential. A low price remains useful only when the seller and exact capacity are trustworthy.
The 990 PRO-versus-NM790 decision uses nm790 value is more than a cheap price to test whether dedicated DRAM and Samsung’s management ecosystem justify a premium over a fast single-sided HMB alternative.
Evaluate NM790 as a deliberate efficient design, not a counterfeit version of a DRAM SSD. Compare seller confidence and the exact 2TB configuration alongside price, because a very low listing can erase the apparent value advantage if the model is ambiguous.
- Single-sided 2TB listing
- HMB 3.0
- Strong Gen4 read class
Creator work can reveal the cache distinction
Large project directories, scratch files and repeated mixed writes can reward the 990 PRO’s dedicated cache and higher published random output. The NM790 may still perform strongly in sequential creator tasks, especially when price allows more capacity elsewhere in the system.
The 990 PRO-versus-NM790 decision uses creator work can reveal the cache distinction to test whether dedicated DRAM and Samsung’s management ecosystem justify a premium over a fast single-sided HMB alternative.
Benchmark representative projects and observe long-transfer behavior after the dynamic cache changes state. Compare seller confidence and the exact 2TB configuration alongside price, because a very low listing can erase the apparent value advantage if the model is ambiguous.
- Track sustained speed
- Keep free space
- Check source bottlenecks
Laptop fit often favors NM790
Lexar’s product sheet lists 2TB as single-sided, an advantage in devices with limited underside clearance. Its HMB design also targets efficiency. The 990 PRO can still be an excellent laptop drive when the system supports its power and cooling profile, but the factory-heatsink version is rarely appropriate for a thin bay.
The 990 PRO-versus-NM790 decision uses laptop fit often favors nm790 to test whether dedicated DRAM and Samsung’s management ecosystem justify a premium over a fast single-sided HMB alternative.
Confirm the notebook manual, link generation and thermal pad arrangement. Compare seller confidence and the exact 2TB configuration alongside price, because a very low listing can erase the apparent value advantage if the model is ambiguous.
- Single-sided can simplify fit
- Check battery priorities
- Use a bare module
PS5 removes one PC advantage
Sony states that PS5 does not support HMB. The NM790 can still qualify as a fast Gen4 SSD, but its host-memory feature is not available in the console. Both products require a cooling assembly that fits, and Lexar also sells heatsink variants that must be kept distinct from bare listings.
The 990 PRO-versus-NM790 decision uses ps5 removes one pc advantage to test whether dedicated DRAM and Samsung’s management ecosystem justify a premium over a fast single-sided HMB alternative.
Use console-specific evidence and total cooling cost rather than PC efficiency claims. Compare seller confidence and the exact 2TB configuration alongside price, because a very low listing can erase the apparent value advantage if the model is ambiguous.
- HMB unavailable on PS5
- Cooling mandatory
- Whole-drive format
Endurance slightly favors Lexar
Lexar rates the NM790 2TB for 1,500TBW, compared with Samsung’s 1,200TBW. The gap is meaningful on paper but smaller than FireCuda-class endurance differences. TBW alone does not establish controller quality, remaining warranty or recovery prospects.
The 990 PRO-versus-NM790 decision uses endurance slightly favors lexar to test whether dedicated DRAM and Samsung’s management ecosystem justify a premium over a fast single-sided HMB alternative.
Estimate actual annual writes and keep the invoice for whichever regional warranty applies. Compare seller confidence and the exact 2TB configuration alongside price, because a very low listing can erase the apparent value advantage if the model is ambiguous.
- NM790: 1,500TBW
- 990 PRO: 1,200TBW
- Both list five years
Management software favors Samsung
Samsung Magician provides a mature path for firmware checks, health reporting and performance features. Lexar’s support resources cover its own product, but buyers should not assume identical diagnostics or update workflows. Software value is highest when the owner will maintain the drive.
The 990 PRO-versus-NM790 decision uses management software favors samsung to test whether dedicated DRAM and Samsung’s management ecosystem justify a premium over a fast single-sided HMB alternative.
Choose the ecosystem that can be supported confidently over the intended ownership period. Compare seller confidence and the exact 2TB configuration alongside price, because a very low listing can erase the apparent value advantage if the model is ambiguous.
- Family-specific firmware
- SMART is not a backup
- Record baseline health
Authenticity and seller confidence
Aggressive NM790 pricing can be legitimate, yet any unusually low marketplace offer deserves exact-model and condition checks. The 990 PRO also attracts counterfeit risk. Packaging, benchmark peaks and a familiar title are insufficient on their own for either family.
The 990 PRO-versus-NM790 decision uses authenticity and seller confidence to test whether dedicated DRAM and Samsung’s management ecosystem justify a premium over a fast single-sided HMB alternative.
Combine model code, seller history, controller identity, firmware and return rights. Compare seller confidence and the exact 2TB configuration alongside price, because a very low listing can erase the apparent value advantage if the model is ambiguous.
- Reject accessory-only listings
- Confirm 2TB variation
- Retain serial evidence
Price gap should be explicit
The NM790 frequently competes by undercutting premium DRAM drives. When the gap is large, many gaming and laptop buyers gain more from the saving than from the PRO’s higher random ratings. When prices converge, Samsung’s DRAM and software strengthen its case.
The 990 PRO-versus-NM790 decision uses price gap should be explicit to test whether dedicated DRAM and Samsung’s management ecosystem justify a premium over a fast single-sided HMB alternative.
Enter current new bare-drive prices and add any cooler required by the host. Compare seller confidence and the exact 2TB configuration alongside price, because a very low listing can erase the apparent value advantage if the model is ambiguous.
- Same capacity
- Same condition
- Same cooling basis
Final choice
Select 990 PRO for demanding mixed work, Samsung Magician and buyers who want a premium DRAM-backed platform. Select NM790 for high Gen4 speed at a sharper price, single-sided laptop fit and a modestly higher TBW rating. PS5 buyers should compare exact heatsink packages.
The 990 PRO-versus-NM790 decision uses final choice to test whether dedicated DRAM and Samsung’s management ecosystem justify a premium over a fast single-sided HMB alternative.
Let today’s trusted offer determine whether the premium is justified. Compare seller confidence and the exact 2TB configuration alongside price, because a very low listing can erase the apparent value advantage if the model is ambiguous.
- 990 PRO: architecture and tools
- NM790: value and fit
- Both: verify exact 2TB model
Official references and methodology
Specifications are linked to manufacturer or platform documentation. Current prices are shown only when this plugin’s dedicated Samsung 990 PRO 2TB catalogue contains an accepted matching offer. Cloudzat does not invent historical prices, featured offers, warranty coverage or seller authorization.
Frequently asked questions
Which is faster, 990 PRO or NM790?
Published sequential read speeds are very close. The 990 PRO has higher published write and random ratings.
Does the NM790 have DRAM?
Lexar specifies Host Memory Buffer 3.0 rather than dedicated DRAM.
Which has higher endurance?
Lexar rates the NM790 2TB at 1,500TBW, compared with Samsung’s 1,200TBW for the 990 PRO 2TB.
Is the NM790 2TB single-sided?
Lexar’s current product sheet lists 1TB through 4TB NM790 models as single-sided.
Which is better for laptops?
The single-sided, HMB-based NM790 can be attractive for fit and efficiency. The 990 PRO may be stronger for premium mixed workloads. Check the exact laptop.
Which is better for PS5?
Both meet the performance class when correctly cooled, but PS5 does not support HMB. Compare exact PS5-ready cooling and current price.
Which is better for gaming?
Both are fast enough for high-end game storage. The lower complete price often matters more than small benchmark differences.
Which has better software support?
Samsung Magician is a significant 990 PRO advantage. Lexar provides product support, but the ownership ecosystem is different.
Do both have five-year warranties?
Both official specifications list five-year limited warranties, subject to endurance and regional terms.
When should I pay more for the 990 PRO?
Pay the premium when dedicated DRAM, higher random performance, Samsung software or a trusted seller route matters to the workload.
Affiliate disclosure: Cloudzat may earn a commission from qualifying Amazon purchases. The price and availability at checkout control the transaction.