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WD_BLACK SN7100 1TB NVMe SSD vs Lexar NM790 NVMe SSD

Both are DRAM-less PCIe 4.0 drives that hit similar sequential speeds, so the choice comes down to capacity, endurance and fit. The WD_BLACK SN7100 is the safer pick for a gaming laptop or handheld: single-sided, power-efficient, backed by a 600 TBW rating and a large body of owner feedback. The Lexar NM790 matches or slightly beats it on paper read speed, is explicitly listed as PS5-compatible, and comes in capacities up to 8TB, but it has far fewer ratings behind it. Buy the WD_BLACK for a thin laptop or handheld and for proven endurance; buy the Lexar for a PS5 or a very large drive.

  • Choose the WD_BLACK SN7100 if you are upgrading a gaming laptop or handheld and want a single-sided, power-efficient drive with a long endurance rating and a wide base of owner reviews.
  • Choose the Lexar NM790 if you are filling a PlayStation 5 or want a drive in capacities well beyond 4TB, and you are comfortable with a smaller review pool.

Prices

  • WD_BLACK SN7100 1TB NVMe SSD: $59.99 at JR'S Western Wear (checked today)
  • Lexar NM790 NVMe SSD: $198.21 at eBay (last seen Nov 9)
  • Difference: the WD_BLACK SN7100 1TB NVMe SSD is $138.22 cheaper than the Lexar NM790 NVMe SSD at the latest prices (Nov 9 and Nov 15)
SanDisk
WD_BLACK 1TB SN7100 NVMe Internal SSD

WD_BLACK SN7100 1TB NVMe SSD

WD_BLACK 1TB SN7100 NVMe Internal SSD

4.4(382 ratings)
$59.99at JR'S Western WearChecked 2 h ago
See all prices and details
Visit JR'S Western Wear
Pros
  • Single-sided design fits thin laptops and handhelds
  • 600 TBW endurance at 1TB
  • Strong write speed and a 35% generational gain claimed
  • Large review base with consistent scores
  • WD_BLACK Dashboard adds health monitoring and Game Mode
Cons
  • DRAM-less, so sustained heavy writes lean on host memory
  • No PlayStation 5 compatibility claim
  • Caps out at 4TB
  • Dashboard software is Windows only
Lexar
Lexar NM790 M.2 2280 PCIe Gen 4x4 NVMe Internal Solid-State Drive, 1 TB

Lexar NM790 NVMe SSD

Lexar NM790 M.2 2280 PCIe Gen 4x4 NVMe Internal Solid-State Drive, 1 TB

4.9(52 ratings)
$198.21at eBayChecked Nov 9
See all prices and details
Visit eBay

Store links may earn us a commission.

Pros
  • Faster claimed sequential read
  • Explicit PlayStation 5 compatibility
  • Capacities up to 8TB
  • HMB 3.0 and Dynamic SLC Cache help burst performance
  • Lower claimed power draw than DRAM-equipped Gen4 drives
Cons
  • Small review pool behind the high rating
  • Lower write speed than the WD_BLACK
  • No published endurance figure to compare
  • DRAM-less like its rival

What separates them

WD_BLACK SN7100 1TB NVMe SSDLexar NM790 NVMe SSD
Sequential readUp to 7,250 MB/sUp to 7,400 MB/s
Sequential writeUp to 6,900 MB/sUp to 6,500 MB/s
Endurance rating (1TB)600 TBWNot published for this listing
DRAM cacheDRAM-less, uses host memoryDRAM-less, uses HMB 3.0
Max capacity offered4TB8TB
PlayStation 5 fitMarketed for PCs, laptops and handheldsExplicitly listed as PS5-compatible
Physical buildSingle-sided, 5.8 g, thin-device friendlyM.2 2280, standard two-sided layout on larger capacities
Owner feedback volume4.4 from 382 ratings4.9 from 52 ratings

Price history

$199.99$59.99
Nov 2Nov 15
  • WD_BLACK SN7100 1TB NVMe SSD: lowest $59.99 on Nov 15 at JR'S Western Wear.
  • Lexar NM790 NVMe SSD: lowest $199.99 on Nov 9 at Best Buy; $199.99 on Nov 14.

Prices at every store

WD_BLACK SN7100 1TB NVMe SSD

  • JR'S Western WearNew

    In stock

    $59.99Free shippingChecked 2 h ago
    Visit JR'S Western Wear
  • Stockyfy.comNew

    In stock

    $115.85Free shippingChecked Nov 11
    Visit Stockyfy.com
  • neweggbusiness.comNew

    Availability unknown

    $144.00Checked 2 h ago
    Visit neweggbusiness.com
  • eBayNew

    Availability unknownSold by elatam111

    $169.99Checked 2 h ago
    Visit eBay

Also available at

  • WalmartCheck price at Walmart

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All 20 stores and price history →

Lexar NM790 NVMe SSD

  • WalmartNew

    In stockSold by AdoramaReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.

    $199.99Checked 21 h ago
    Visit Walmart
  • Best BuyNew

    In stock

    $199.99Free shippingChecked 23 h ago
    Visit Best Buy
  • AdoramaNew

    In stock

    $199.99Free shippingChecked 23 h ago
    Visit Adorama
  • eBayNew

    Availability unknownSold by germra_67 (100% positive, 795 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $198.21Free shippingChecked Nov 9
    Visit eBay

Also available at

  • WalmartCheck price at Walmart
  • eBayCheck price at eBay

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All 19 stores and price history →

Specs compared

SpecWD_BLACK SN7100 1TB NVMe SSDLexar NM790 NVMe SSD
InterfaceM.2 NVMe Gen 4.0 x 4PCIe Gen4 x4 NVMe
Form factor2280mmM.2
TypeInternalSSD
ConnectionM.2M.2
ColorBlackBlack
NVMeYesYes
Capacity500 GB, 1 TB, 4 TB512 GB, 1 TB, 2 TB, 4 TB, 8 TB
Size (GB)10001000
Storage capacity1TB—
Read transfer speed7250 MB/s—
Write transfer speed6900 MB/s—
Interface versionPCIe 4.0—
Show all 36 specsShow fewer specs
SpecWD_BLACK SN7100 1TB NVMe SSDLexar NM790 NVMe SSD
ProtocolNVMe—
Memory type (NAND)TLC—
Max. random 4K read1000 IOPS—
Max. random 4K write1400 IOPS—
Max. TBW600 TB—
Weight5.80 g—
UseInternal—
Device CompatibilityPC—
Wireless ConnectivityNo—
Read Speed7250 MB/s

What reviewers say

WD_BLACK SN7100 1TB NVMe SSD

  • 4.4 / 5382 ratings

Rated 4.4 out of 5 from 382 ratings, buyers mostly report fast load times and easy installation. Complaints center on sustained-write speed and heat under heavy use.

What people mention
  • SpeedPraisedOwners say game loads and file copies are much faster than the Gen3 drives they replaced.
  • InstallationPraisedBuyers describe a straightforward M.2 install with no driver hassle.
  • Sustained writesCriticisedSome report write speeds falling below the rated figure on large continuous transfers.
  • HeatMixedIt runs warm under load; some add a heatsink, others say it stays fine.

Lexar NM790 NVMe SSD

  • 4.9 / 552 ratings

Owners rate the NM790 very highly, calling it fast, cool-running and easy to install. Most praise comes from gamers and laptop upgraders who see near-flagship load times for far less than premium drives. The main complaints concern sustained write speed and the lack of a heatsink.

What people mention
  • SpeedPraisedOwners report quick boots, fast game loads and near-advertised sequential speeds.
  • ThermalsPraisedReviewers note it runs cool and draws little power, which suits laptops and handhelds.
  • ValuePraisedBuyers see it as one of the better Gen 4 drives for the money.
  • Sustained writesCriticised

Questions and answers

Which is better for a gaming laptop or handheld?
The WD_BLACK SN7100. It is single-sided and tuned for power efficiency in portable devices, which matters for heat and battery life in a tight chassis. The Lexar works too, but it is aimed more at desktops and the PS5.
Which one should I put in a PlayStation 5?
The Lexar NM790. Lexar lists PS5 compatibility directly, and the drive meets the speed class Sony requires. The WD_BLACK is sold for PCs and handhelds, so check its heatsink and fit before using it there.
Does the lack of DRAM matter on either drive?
Both are DRAM-less and rely on host memory, so neither has an edge here. For game loading and everyday use the difference is small; for long sustained writes, a DRAM-equipped drive would be the step up.
Which lasts longer?
The WD_BLACK publishes a 600 TBW endurance rating at 1TB, which is a solid figure for a consumer Gen4 drive. Lexar does not publish a comparable number for the NM790, so the WD_BLACK is the clearer bet on rated lifespan.
Is the Lexar worth stepping up to over the WD_BLACK?
Only if you need a PS5 drive or a capacity above 4TB. On speed the two are close, with the Lexar slightly ahead on reads and the WD_BLACK ahead on writes, so neither is a clear upgrade for a PC.
Which runs cooler in a small case?
Both are DRAM-less and efficient, and Lexar claims up to 40% lower power draw than DRAM-equipped Gen4 drives. The WD_BLACK is built with handhelds in mind. Either is a reasonable choice for a cramped build.

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Buying guides that pick them

  • Best 1TB NVMe SSDs
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  • Best NVMe SSDs for desktop and laptop upgrades
—
Write Speed6900 MB/s—
NVMe SupportYes—
PCIe SupportYes—
CacheDRAM-less—
Data EncryptionNON-SED—
Security HighlightsSupports TRIM functions, Supports ECC, Supports…—
Design HighlightsSingle-sided—
Typical UsersGamers—
RemovableNo—
Power ConsumptionLow power consumption—
hard_drive_capacity—1 TB
M.2 Form Factor—2280
Placement—Internal
Sequential Write (MB/s)—6500
Write speed drops once the SLC cache fills on large transfers.