WD_BLACK SN850X NVMe Internal SSD, 1TB vs Lexar NM790
Buy the Lexar NM790 if you want the lowest price per gigabyte and top-end sequential speed for gaming and large file work. Buy the WD_BLACK SN850X if you want a drive with a proven track record on sustained writes and a dedicated gaming feature set. The NM790's best new price is $199.99 at Amazon as of November 3, 2026, against $245.00 at Walmart for the SN850X. That is about $45 less for the Lexar.
Today the Lexar NM790 costs $45.01 less at its best price.
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WD_BLACK SN850X NVMe Internal SSD, 1TB
4.5$245.00at WalmartObserved at 7:11 AM
Choose the WD_BLACK SN850X if you want a well-known gaming SSD with Game Mode 2.0 on Windows and a long record of consistent performance under sustained load.
Pros
- Dedicated DRAM cache helps keep write speeds steady on large transfers.
- Game Mode 2.0 on Windows adds a load-priority mode for games.
- Higher rated endurance per capacity than the NM790.
- Long-established WD_BLACK firmware and support.
Cons
- Costs about $45 more at the best new price.
- Only 1TB and 2TB capacities listed.
What separates them
| WD_BLACK SN850X NVMe Internal SSD, 1TB | Lexar NM790 | |
|---|---|---|
| Best new price (as of November 3, 2026) | $245.00 at Walmart | $199.99 at Amazon |
| Max sequential read | 7,300 MB/s | 7,400 MB/s |
| Max sequential write | 6,600 MB/s | 6,500 MB/s |
| DRAM cache | Yes, dedicated DRAM cache | No DRAM; uses HMB 3.0 and dynamic SLC cache |
| Capacity options | 1TB and 2TB | 512GB, 1TB, 2TB, 4TB and 8TB |
| Gaming software | Game Mode 2.0 on Windows | None |
| Rated endurance | Higher TBW per capacity tier | Lower TBW per capacity tier |
Price history
$245.00$199.99
- WD_BLACK SN850X NVMe Internal SSD, 1TB: lowest $239.99 on Nov 3 at Central Computers.
- Lexar NM790: lowest $199.99 on Nov 3 at Walmart.
Prices at every store
WD_BLACK SN850X NVMe Internal SSD, 1TB
- WalmartNew
In stock
$245.00Free shippingObserved at 7:11 AM - Central ComputersNew
In stock
$239.99+ $39.20 shippingObserved at 7:13 AM - EXcaliberPC.comNew
In stock
$299.00+ $30.20 shippingObserved at 7:13 AM - AmazonNew
Availability unknown
$247.99Free shippingObserved at 7:13 AM
Also available at
- Best BuyCheck price at Best Buy
- eBayCheck price at eBay
- WalmartCheck price at Walmart
Specs compared
| Spec | WD_BLACK SN850X NVMe Internal SSD, 1TB | Lexar NM790 |
|---|---|---|
| color | Black | Black, Gray |
| Form factor | M.2 2280 | M.2 2280 |
| hard_drive_capacity | 1 TB | — |
| Storage capacity | 2TB | — |
| Max sequential read | 7300MB/s | — |
| Max sequential write | 6600Mb/s | — |
| 4K random read | 1200K | — |
| 4K random write | 1100K | — |
| SSD memory type | TLC | — |
| Interface | PCI Express NVMe 4.0 x4 | — |
| Item height |
Questions and answers
- Which is better for gaming?
- Both are PCIe 4.0 drives and load games at nearly the same speed. The SN850X adds Game Mode 2.0 on Windows and a DRAM cache, which helps on sustained writes. The NM790 is fine for game libraries and costs less.
- Is the SN850X worth the extra $45?
- Only if you write large files often or want the gaming software and DRAM cache. For game installs and everyday use, the NM790 at $199.99 does the same job for less.
- Which lasts longer?
- The SN850X has the higher rated endurance per capacity tier. Real-world life depends on how much you write; both carry multi-year warranties.
- Does the NM790 work in a PS5?
- Yes. Lexar lists PlayStation 5 compatibility, and the M.2 2280 form factor fits the PS5 expansion slot. The SN850X also fits with a heatsink version.
- Which has more capacity choices?
- The NM790. It comes in 512GB, 1TB, 2TB, 4TB and 8TB. The SN850X listing covers 1TB and 2TB.
- Which is cheaper right now?
- The NM790 at $199.99 at Amazon as of November 3, 2026, versus $245.00 at Walmart for the SN850X.
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