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Compare SANDISK Optimus GX PRO 850X 8TB Heatsink vs Silicon Power A55 4TB

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  2. Solid State Drives
  3. SANDISK Optimus GX PRO 850X 8TB Heatsink 🆚 Silicon Power A55 4TB
The main differences between SANDISK Optimus GX PRO 850X 8TB Heatsink and Silicon Power A55 4TB are in Capacity, Interface, NVME and Form Factor.
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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
Silicon Power A55 4TB 3D NAND SLC SATA III 2.5'' (SP004TBSS3A55S25)
Silicon Power A55 4TB
Prices
(Change region)
In Stock
Free shipping
$2,699.99
Prices
(Change region)
In Stock
$329.97
Last updated 30 minutes ago.
In Stock
Free shipping
$349.79
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* Product prices and availability are subject to change frequently. Any price and availability information displayed on Amazon at the time of purchase will apply.
Brand
SanDisk
Brand
Silicon Power
Model
  • SDSP81800TAH-000E0
  • SDSP81800TAH
Model
  • SP004TBSS3A55S25
  • SU004TBSS3A55S25NE
  • SP004TBSS3A55S25AY
Release Date
📅 February 2026
Release Date
-
* First availability for purchase, it may not correspond to the actual market launch date.
User reviews
User reviews
Price history
View Details ►
Price history
View Details ►
Price/GB
$0.34
Price/GB
$0.08
GB/$1
2.96
GB/$1
12.12
Capacity
8000 GB
Capacity
4000 GB
Interface
PCIe Gen4 x4
Interface
SATA 6 Gb/s
NVME
Yes
NVME
No
Form Factor
M.2-2280
Form Factor
2.5"
-

Comparison and key differences summary

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

  • More Capacity (+4000 GB available)
  • Newer interface (PCIe Gen4 x4)

Buy now

Reasons to buy the Silicon Power A55 4TB:

  • 88% cheaper, you can save $2,370.02

Buy now

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