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WD Red SN700 1TB NVMe SSD vs WD_BLACK SN7100 4TB NVMe SSD

The WD_BLACK SN7100 is the faster, larger drive and the better pick for gaming, video editing and any modern PCIe 4.0 laptop or desktop. The WD Red SN700 is a 2021-era PCIe 3.0 drive built for NAS and always-on workloads, with lower endurance and roughly half the sequential speed. Owners of both report stable performance; the SN7100 runs hotter under sustained writes and may need a heatsink in tight builds.

  • Choose the WD Red SN700 if you are upgrading an older PCIe 3.0 system or filling a NAS and want a proven, low-power drive with steady sustained writes.
  • Choose the WD_BLACK SN7100 if you want maximum speed and capacity for gaming, large file transfers or content creation on a PCIe 4.0 machine.

Prices

  • WD Red SN700 1TB NVMe SSD: $137.87 at BlueDogInk (checked today)
  • WD_BLACK SN7100 4TB NVMe SSD: $560.00 at eBay (checked today)
  • Difference: the WD Red SN700 1TB NVMe SSD is $422.13 cheaper than the WD_BLACK SN7100 4TB NVMe SSD today
Sandisk
Sandisk WD Red SN700 Series 1TB M.2 2280 M-Key PCIe NVMe SSD Drive, single-sided (WDS100T1R0C)

WD Red SN700 1TB NVMe SSD

Sandisk WD Red SN700 Series 1TB M.2 2280 M-Key PCIe NVMe SSD Drive, single-sided (WDS100T1R0C)

$137.87at BlueDogInkObserved at 4:31 AM
See all prices and details
Visit BlueDogInk
Pros
  • Single-sided M.2 2280 fits thin laptops and many NAS slots
  • Steady sustained write behavior suited to 24/7 use
  • Runs cooler and draws less power than Gen4 drives
  • Widely available and well documented since 2021
Cons
  • PCIe 3.0 speeds are roughly half of Gen4 rivals
  • 1 TB capacity is small for game libraries and 4K video
  • Older platform with no published random IOPS figures
SanDisk
WD_BLACK SN7100 M.2 2280 4TB PCI-Express 4.0 x4 TLC 3D NAND Internal Solid State Drive (SSD)

WD_BLACK SN7100 4TB NVMe SSD

WD_BLACK SN7100 M.2 2280 4TB PCI-Express 4.0 x4 TLC 3D NAND Internal Solid State Drive (SSD)

4.5(4 ratings)
$560.00at eBayObserved at 12:10 AM
See all prices and details
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Store links may earn us a commission.

Pros
  • Near-saturates PCIe 4.0 at 7,000 MB/s read and 6,700 MB/s write
  • 4 TB capacity handles large game and media libraries
  • High endurance at 2,400 TBW
  • Strong random IOPS for load times and multitasking
Cons
  • Runs warm under sustained writes; a heatsink helps
  • Needs a PCIe 4.0 slot to reach rated speeds
  • Gen4 speed is wasted in older PCIe 3.0 systems

What separates them

WD Red SN700 1TB NVMe SSDWD_BLACK SN7100 4TB NVMe SSD
InterfacePCIe 3.0 x4 NVMePCIe 4.0 x4 NVMe
Sequential read3,400 MB/s7,000 MB/s
Sequential write2,900 MB/s6,700 MB/s
Capacity as listed1 TB (2 TB variant also sold)4 TB
Endurance (TBW)About 2,000 TBW on the 1 TB model2,400 TBW
Random 4K IOPSNot published for this model900K read / 1.35M write
Design focusNAS and always-on workloads, single-sided PCBConsumer gaming and creator workloads, TLC 3D NAND
Heat and powerLower power draw, runs coolerFaster but warmer under sustained writes

Price history

$676.50$137.87
Nov 2Nov 9
  • WD Red SN700 1TB NVMe SSD: lowest $137.87 on Nov 9 at BlueDogInk.
  • WD_BLACK SN7100 4TB NVMe SSD: lowest $599.99 on Nov 9 at Newegg.

Prices at every store

WD Red SN700 1TB NVMe SSD

  • BlueDogInkNew

    Availability unknown

    $137.87Observed at 4:31 AM
    Visit BlueDogInk
  • eBayNew

    Availability unknownSold by egoods.supply (99.9% positive, 26,600 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $165.00Free shippingObserved at 4:30 AM
    Visit eBay
  • AmazonNew

    Availability unknown

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

    $499.99Free shippingObserved at 4:30 AM
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  • WalmartNew

    Availability unknown

    $699.33Observed Nov 2, 2026, 8:23 AM
    Visit Walmart

Also available at

  • eBayCheck price at eBay

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All 6 stores and price history →

WD_BLACK SN7100 4TB NVMe SSD

  • NeweggNew

    In stock

    $599.99Free shippingObserved at 12:10 AM
    Visit Newegg
  • WalmartNew

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

    $624.99Observed at 12:10 AM
    Visit Walmart
  • Best BuyNew

    In stock

    $624.99Free shippingObserved at 12:10 AM
    Visit Best Buy
  • eBayNew

    Availability unknownSold by best-deals1973 (100% positive, 1,400 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $560.00Free shippingObserved at 12:10 AM
    Visit eBay

Store links may earn us a commission. Some prices via Klarna.

All 7 stores and price history →

Specs compared

SpecWD Red SN700 1TB NVMe SSDWD_BLACK SN7100 4TB NVMe SSD
TypeInternalSSD
Form FactorM.2 2280M.2
ColorRedMulticolor
ConnectionM.2—
NVMeYes—
Release DateSeptember 2021—
Capacity2 TB—
Read Speed3,400 MB/s—
Write Speed2,900 MB/s write speed—
M.2 Form Factor—2280
Wi-Fi—No
TBW (terabytes written) (TB)—2400
Show all 24 specsShow fewer specs
SpecWD Red SN700 1TB NVMe SSDWD_BLACK SN7100 4TB NVMe SSD
Depth (")—3.1
Width (")—0.9
Weight (oz)—0.2
Placement—Internal
Size (GB)—4000
Height (")—0.044
Flash Memory—3D TLC
Random Write 4KB (max) (IOPS)—1350000
Sequential Write (MB/s)—6700
Sequential Read (MB/s)

What reviewers say

WD Red SN700 1TB NVMe SSD

Owners generally rate the WD Red SN700 as a reliable, cool-running NAS drive that holds up under constant writes. Some note it is not the fastest drive and that sustained write speeds drop once the SLC cache fills.

What people mention
  • EndurancePraisedOwners value the high TBW rating for NAS and always-on workloads.
  • SpeedMixedSequential speeds are good for PCIe 3.0, but sustained writes fall off after the cache fills.
  • ThermalsPraisedThe drive runs cool and draws little power in NAS enclosures.
  • DRAM cacheCriticisedSome buyers note the lack of DRAM cache limits heavy random-write performance.

WD_BLACK SN7100 4TB NVMe SSD

Owners of the SN7100 line generally report fast game and app loads and stable everyday performance, and the 4TB size draws praise for consolidating storage. Complaints center on sustained write speed dropping under long transfers and on the premium of the top capacity.

What people mention
  • SpeedPraisedOwners say games and apps load quickly and everyday transfers feel instant.
  • Sustained writesCriticisedLong copies slow down once the cache is exhausted, which matters for large video files.
  • ThermalsPraisedThe drive runs cool enough for laptops and console expansion without a heatsink.
  • CapacityPraisedBuyers like fitting 4TB in one slim M.2 slot.

Questions and answers

Which is better for gaming?
The SN7100. Its Gen4 speeds and high random IOPS cut load times and speed up installs, and 4 TB holds a large library. The SN700 works fine for games but is limited by PCIe 3.0 bandwidth.
Which lasts longer?
The SN7100 on paper, at 2,400 TBW versus roughly 2,000 TBW on the 1 TB SN700. Both carry multi-year warranties, and real-world lifespan depends on how much you write.
Is the SN7100 worth stepping up to?
Yes if your system has a PCIe 4.0 slot and you move large files or play big games. If you have an older PCIe 3.0 machine or a NAS, the SN700 is the more sensible fit.
Will the SN700 work in a PCIe 4.0 slot?
Yes, it is backward and forward compatible, but it will run at PCIe 3.0 speeds. You would not get the slot's full bandwidth.
Do either need a heatsink?
The SN700 runs cool enough bare in most laptops and NAS units. The SN7100 benefits from a heatsink under sustained writes, and many Gen4 motherboards include one.
Which suits a NAS?
The SN700. It was designed for always-on caching and storage workloads, draws less power and runs cooler. The SN7100 is aimed at consumer PCs.

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More comparisons

  • Sandisk WD Red SN700 Series 1TB M.2 2280 M-Key PCIe NVMe SSD Drive, single-sided (WDS100T1R0C) vs Crucial T500 4TB PCIe 4.0 NVMe M.2 SSD
  • Sandisk WD Red SN700 Series 1TB M.2 2280 M-Key PCIe NVMe SSD Drive, single-sided (WDS100T1R0C) vs SanDisk Ultra SSD
  • WD_BLACK SN7100 M.2 2280 4TB PCI-Express 4.0 x4 TLC 3D NAND Internal Solid State Drive (SSD) vs Corsair MP700 PRO SE Hydro X Series PCIe 5.0 NVMe M.2 SSD
  • WD_BLACK SN7100 M.2 2280 4TB PCI-Express 4.0 x4 TLC 3D NAND Internal Solid State Drive (SSD) vs SanDisk Ultra SSD

Buying guides that pick them

  • Best budget 4TB NVMe SSDs
—
7000
Interface—PCIe Gen4 x4 NVMe
Random Read 4KB (max) (IOPS)—900000