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Compare SANDISK Optimus GX PRO 850X 8TB Heatsink vs WD Black SN750 4TB

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  3. SANDISK Optimus GX PRO 850X 8TB Heatsink 🆚 WD Black SN750 4TB
SANDISK Optimus GX PRO 850X 8TB Heatsink and WD Black SN750 4TB are both solid state drives with the same Form Factor (M.2-2280). The main differences are in Capacity and Interface.
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SANDISK Optimus GX PRO 850X 8TB NVMe Heatsink PCIe Gen4 x4 M.2-2280 SDSP81800TAH-000E0
SANDISK Optimus GX PRO 850X 8TB Heatsink
WD Black SN750 4TB NVMe Gen3 PCIe M.2 2280 3D NAND WDS400T3X0C
WD Black SN750 4TB
Prices
(Change region)
In Stock
Free shipping
$2,699.99
Prices
(Change region)
Out of Stock
$479.99
Out of Stock
Free shipping
$549.99
Out of Stock
Free shipping
$549.99
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Brand
SanDisk
Brand
Western Digital
Model
  • SDSP81800TAH-000E0
  • SDSP81800TAH
Model
WDS400T3X0C
Release Date
📅 February 2026
Release Date
📅 December 2020
* First availability for purchase, it may not correspond to the actual market launch date.
User reviews
User reviews
★★★★★
(179 reviews)
Price history
View Details ►
Price history
View Details ►
Price/GB
$0.34
Price/GB
$0.12
GB/$1
2.96
GB/$1
8.33
Series
-
Series
BLACK SN750 NVMe
Capacity
8000 GB
Capacity
4000 GB
Interface
PCIe Gen4 x4
Interface
PCIe Gen3 x4
NVME
Yes
NVME
Yes
Form Factor
M.2-2280
Form Factor
M.2-2280
NAND Flash Type
-
NAND Flash Type
64-layer 3D NAND
Max Sequential Read
-
Max Sequential Read
Up to 3400 MB/s
Max Sequential Write
-
Max Sequential Write
Up to 3100 MB/s
MTBF
-
MTBF
1,750,000 hours
-

Comparison and key differences summary

Reasons to buy the SANDISK Optimus GX PRO 850X 8TB Heatsink:

  • Newer Product, it was released around 5 years later
  • More Capacity (+4000 GB available)
  • Newer interface (PCIe Gen4 x4)

Buy now

Reasons to buy the WD Black SN750 4TB:

  • 82% cheaper, you can save $2,220.00

Buy now

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