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Lexar NM790 NVMe SSD vs WD Black SN7100 1TB NVMe SSD

Both are fast PCIe Gen 4 drives and either will feel quick in a desktop, laptop or PS5. The Lexar NM790 runs slightly cooler and uses less power thanks to its DRAM-less HMB design, which suits laptops and handhelds. The WD_BLACK SN7100 has a higher rated endurance (600 TBW) and a stronger sustained-write reputation, so it is the safer pick for heavy writes and long-term use. Owners rate both highly; the SN7100 edges ahead on build confidence and warranty support.

  • Choose the Lexar NM790 if you want a cool-running, power-efficient drive for a laptop, handheld or PS5 and mostly read and game rather than write large files all day.
  • Choose the WD_BLACK SN7100 if you write a lot of large files, want higher rated endurance and prefer a drive with a longer track record of sustained performance.

Prices

  • Lexar NM790 NVMe SSD: $198.21 at eBay (last seen Nov 9)
  • WD Black SN7100 1TB NVMe SSD: $59.99 at JR'S Western Wear (last seen Nov 13)
  • 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 13)
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
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Pros
  • High 7,400 MB/s read speed
  • Low power draw, good for laptops and handhelds
  • Runs cool without a heatsink
  • Works in desktops, laptops and PS5
Cons
  • No published TBW endurance figure
  • Write speed trails the SN7100
  • Sustained writes slow once the SLC cache fills
  • Fewer capacity options
718037893204
Western Digital BLACK SN7100 1TB TLC PCIe 4.0 NVMe 3D NAND M.2 2280 Solid State Drive (SSD)

WD Black SN7100 1TB NVMe SSD

Western Digital BLACK SN7100 1TB TLC PCIe 4.0 NVMe 3D NAND M.2 2280 Solid State Drive (SSD)

4.8(91 ratings)
$59.99at JR'S Western WearChecked Nov 13
See all prices and details
Visit JR'S Western Wear
Pros
  • 600 TBW rated endurance
  • Faster 6,900 MB/s write speed
  • Strong sustained-write behavior
  • Available up to 4 TB
Cons
  • Slightly lower read speed than the NM790
  • Needs a heatsink in some PS5 and tight builds
  • Costs more per terabyte at higher capacities

What separates them

Lexar NM790 NVMe SSDWD Black SN7100 1TB NVMe SSD
Sequential readUp to 7,400 MB/sUp to 7,250 MB/s
Sequential writeUp to 6,500 MB/sUp to 6,900 MB/s
Rated enduranceNot published by Lexar for this model600 TBW
DRAM cacheDRAM-less, uses Host Memory Buffer 3.0DRAM-less, uses HMB with Polaris 3 controller
Power useUp to 40% lower than DRAM-equipped Gen 4 drivesImproved efficiency, tuned for laptops and handhelds
Sustained write under loadDynamic SLC cache; speed drops once cache fillsTLC 3D NAND with strong sustained-write reputation
PS5 compatibilityListed as compatibleFits the PS5 slot; check heatsink clearance
Capacity range1 TB and 2 TBUp to 4 TB

Price history

$199.99$59.99
Nov 9Nov 14
  • Lexar NM790 NVMe SSD: lowest $199.99 on Nov 9 at Adorama; $199.99 on Nov 14.
  • WD Black SN7100 1TB NVMe SSD: lowest $59.99 on Nov 13 at JR'S Western Wear.

Prices at every store

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 15 min ago
    Visit Walmart
  • Best BuyNew

    In stock

    $199.99Free shippingChecked 1 h ago
    Visit Best Buy
  • AdoramaNew

    In stock

    $199.99Free shippingChecked 1 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 →

WD Black SN7100 1TB NVMe SSD

  • JR'S Western WearNew

    In stock

    $59.99Free shippingChecked Nov 13
    Visit JR'S Western Wear
  • Stockyfy.comNew

    Availability unknown

    $115.85Free shippingChecked Nov 13
    Visit Stockyfy.com
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $159.99Free shippingChecked Nov 11
    Visit Amazon
  • eBayNew

    Availability unknownSold by purpletechnado (100% positive, 96,000 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $169.94Free shippingChecked 2 h ago
    Visit eBay

Also available at

  • eBayCheck price at eBay

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All 15 stores and price history →

Specs compared

SpecLexar NM790 NVMe SSDWD Black SN7100 1TB NVMe SSD
InterfacePCIe Gen4 x4 NVMePCIe Gen 4 x 4
Capacity512 GB, 1 TB, 2 TB, 4 TB, 8 TB1TB
hard_drive_capacity1 TB—
Form FactorM.2—
TypeSSD—
M.2 Form Factor2280—
PlacementInternal—
Size (GB)1000—
Sequential Write (MB/s)6500—
ConnectionM.2—
ColorBlack—
NVMeYes—
Show all 19 specsShow fewer specs
SpecLexar NM790 NVMe SSDWD Black SN7100 1TB NVMe SSD
NAND Flash—3D TLC NAND Flash
Read Speed—Up to 7,250MBps
Write Speed—Up to 6,900MBps
Endurance—600 TBW
Controller Type—Polaris 3
Height—1.02 mm
Weight—5.8 g

What reviewers say

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 writesCriticisedWrite speed drops once the SLC cache fills on large transfers.

WD Black SN7100 1TB NVMe SSD

  • 4.8 / 591 ratings

Reviewers treat the SN7100 as one of the better value PCIe 4.0 gaming drives, praising its read speeds and cool running. They note the DRAM-less design and slower sustained writes as the main trade-offs against pricier drives.

What people mention
  • SpeedPraisedReviewers say reads are fast enough to load games and large files quickly.
  • ThermalsPraisedOwners report it runs cool and draws little power, which suits laptops and compact builds.
  • Sustained writesCriticisedWrite speeds drop once the cache fills during long transfers.
  • DRAM cacheMixed

Questions and answers

Which is better for a laptop or handheld?
The Lexar NM790. Its lower power draw and cooler running suit battery-powered devices, and the read speed is slightly higher.
Which lasts longer?
The WD_BLACK SN7100 has a published 600 TBW endurance rating. Lexar does not publish a TBW figure for the NM790, so the SN7100 is the safer bet for heavy write workloads.
Which is better for a PS5?
Both work. The NM790 runs cooler without a heatsink, while the SN7100 may need a slim heatsink to fit the PS5 bay.
Is the SN7100 worth stepping up to?
Yes if you write large files often or want the higher endurance rating. For gaming and general use the difference is small.
Do either have a DRAM cache?
No. Both are DRAM-less and rely on Host Memory Buffer, which is fine for most home and gaming use.
Which is faster in real use?
They are close. The NM790 reads slightly faster; the SN7100 writes faster and holds speed better on long transfers.

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More comparisons

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  • Samsung SSD 990 Pro With Heatsink vs Lexar NM790 M.2 2280 PCIe Gen 4x4 NVMe Internal Solid-State Drive, 1 TB
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The DRAM-less design is fine for gaming but noted as a limit for heavy write workloads.