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WD_BLACK SN8100 NVMe SSD vs Adata XPG GAMMIX S70 Blade SSD

Buy the WD_BLACK SN8100 if you have a PCIe 5.0 slot and want the fastest drive here: about 14,900 MB/s reads versus 7,400 MB/s on the S70 Blade. Buy the XPG GAMMIX S70 Blade if you are on PCIe 4.0, want a PS5-ready drive with a heatsink, or want to spend less. The SN8100 is $249.99 at Best Buy as of November 7, 2026, down from $399.99 on November 3; no current price was given for the S70 Blade, so check its live price before deciding.

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Western Digital
Western Digital WD_BLACK SN8100 NVMe SSD

WD_BLACK SN8100 NVMe SSD

Western Digital WD_BLACK SN8100 NVMe SSD

4.8(150 ratings)
$249.99at Best BuyObserved Nov 7, 2026, 9:52 AM
See all prices and details
Visit Best Buy

Store links may earn us a commission. Price via Klarna.

Choose the WD_BLACK SN8100 if you have a PCIe 5.0 motherboard and want the fastest sequential speeds for large game installs, level loads and big file transfers.

Pros
  • PCIe 5.0 speeds roughly double the S70 Blade on paper.
  • DRAM cache and hardware encryption.
  • 700TBW endurance rating for the 1TB model.
  • Price fell from $399.99 to $249.99 in four days.
Cons
  • Needs a PCIe 5.0 slot to hit its rated speeds.
  • No heatsink listed, which matters on some boards and in tight cases.
  • Only 150 ratings so far.
  • Low-power profile still runs hot at Gen 5 speeds.
Adata
Adata XPG GAMMIX S70 Blade M.2 SSD

Adata XPG GAMMIX S70 Blade SSD

Adata XPG GAMMIX S70 Blade M.2 SSD

4.8(2,500 ratings)
See all prices and details

Choose the XPG GAMMIX S70 Blade if you are on PCIe 4.0, need a drive for a PS5, or want a proven drive with a much larger review base.

Pros
  • Works in a PS5 and most PCIe 4.0 PCs.
  • Heatsink included, so no extra part to buy.
  • 4.8 of 5 from 2,500 ratings.
  • DRAM plus SLC cache for steady write performance.
Cons
  • PCIe 4.0 caps it near 7,400 MB/s.
  • Peak power of 8.63 W is high for a laptop.
  • No TBW endurance figure given in the specs.
  • Older generation than the SN8100.

What separates them

WD_BLACK SN8100 NVMe SSDAdata XPG GAMMIX S70 Blade SSD
InterfacePCIe 5.0 x4PCIe 4.0 x4
Sequential read14,900 MB/s7,400 MB/s
Sequential write14,000 MB/s6,400 MB/s
CacheDRAM cacheDRAM plus SLC cache
HeatsinkNot listedFlat aluminum heatsink included
PS5 compatibilityNot listed; PC, gaming and workstation systemsListed for PS5
Endurance rating700TBW (1TB)Not given; 1500 G operating shock rating
Review base4.8 of 5 from 150 ratings4.8 of 5 from 2,500 ratings

Price history

$399.99$129.99
Nov 3Nov 7
  • WD_BLACK SN8100 NVMe SSD: lowest $249.99 on Nov 7 at Newegg.
  • Adata XPG GAMMIX S70 Blade SSD: lowest $129.99 on Nov 3 at Best Buy.

Prices at every store

WD_BLACK SN8100 NVMe SSD

  • Best BuyNew

    In stock

    $249.99Free shippingObserved Nov 7, 2026, 9:52 AM
    Visit Best Buy
  • NeweggNew

    In stock

    $249.99Free shippingObserved Nov 7, 2026, 9:52 AM
    Visit Newegg

Also available at

  • B&H Photo-Video-AudioCheck price at B&H Photo-Video-Audio
  • Central ComputersCheck price at Central Computers
  • CTT Home & CulinaryCheck price at CTT Home & Culinary

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

All 2 stores and price history →

Adata XPG GAMMIX S70 Blade SSD

  • AAAwaveCheck price at AAAwave
  • Best BuyCheck price at Best Buy
  • DirectDialCheck price at DirectDial
Prices and history →

Specs compared

SpecWD_BLACK SN8100 NVMe SSDAdata XPG GAMMIX S70 Blade SSD
InterfacePCIe Gen 5, NVMe, PCIe 5.0PCIe Gen4x4, PCIe 4.0, PCI Express 4.0
TypeSSDSSD
UseInternalInternal, Gaming storage
Device CompatibilityPC, Gaming system, Workstation systemPS5, PC
Durability700TBW (for 1TB)1500 G (operating shock)
Read Speed14900 MB/s7400 MB/s
Write Speed14,000 MB/s6400 MB/s
NVMe SupportYesYes
PCIe SupportYesYes
CacheDRAM cacheDRAM cache, SLC cache
Data EncryptionYesYes
Form FactorM.2, M.2 2280M.2
Show all 18 specsShow fewer specs
SpecWD_BLACK SN8100 NVMe SSDAdata XPG GAMMIX S70 Blade SSD
Typical UsersGamersGamers
Power ConsumptionLow-power profileOver 1.6 W (at idle), 8.63 W (peak during workl…
RemovableNoNo
Security HighlightsHardware encryption—
Power SourceNo extra power cords required—
Design Highlights—Flat aluminum heatsink

What reviewers say

WD_BLACK SN8100 NVMe SSD

  • 4.8 / 5150 ratings

Rated 4.8 out of 5 from 150 ratings, buyers mostly praise the speed and easy setup. Complaints center on heat and price rather than reliability.

What people mention
  • SpeedPraisedOwners report very fast game loads and large file transfers.
  • HeatMixedSome say it runs warm under long writes and needs a heatsink.
  • SetupPraisedInstallation in an M.2 slot is described as quick and trouble-free.
  • PriceCriticisedBuyers say it costs noticeably more per terabyte than Gen 4 drives.

Adata XPG GAMMIX S70 Blade SSD

  • 4.8 / 52,500 ratings

Rated 4.8 out of 5 from about 2,500 ratings, buyers mostly report fast load times and easy PS5 installation. Complaints center on heat and fit in tight slots.

What people mention
  • SpeedPraisedOwners say game and app loads drop sharply compared with older SATA drives.
  • PS5 fitPraisedBuyers report the flat heatsink slides into the PS5 bay without modification.
  • HeatMixedSome say it runs warm under sustained writes and needs airflow.
  • HeatsinkMixedThe non-removable heatsink helps cooling but can block tight motherboard slots.

Questions and answers

Which is faster in real games?
The SN8100 is faster on paper, but game load times are close on both because games rarely saturate either drive. The gap shows up in large file copies and direct storage workloads.
Will the SN8100 work in a PS5?
The listing does not name PS5 compatibility, while the S70 Blade does. For a PS5, the S70 Blade is the safer pick.
Is the SN8100 worth the extra money?
At $249.99 at Best Buy as of November 7, 2026, it is close to what good PCIe 4.0 drives cost. It is worth it if you have a Gen 5 slot; otherwise the S70 Blade is enough.
Do I need a heatsink?
The S70 Blade includes a flat aluminum heatsink. The SN8100 listing does not, so check your motherboard's M.2 heatsink before buying.
Which lasts longer?
The SN8100 1TB is rated at 700TBW. The S70 Blade listing gives no TBW figure, so the SN8100 has the clearer endurance number.
Which is better for a laptop?
The SN8100 lists a low-power profile. The S70 Blade peaks at 8.63 W, which drains a battery faster.