Compare Solid State Drives

Compare SANDISK Optimus GX PRO 850X 4TB vs Silicon Power US75 4TB

SANDISK Optimus GX PRO 850X 4TB and Silicon Power US75 4TB are both solid state drives with the same Capacity (4000 GB), Interface (PCIe Gen4 x4) and Form Factor (M.2-2280).

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SANDISK Optimus GX PRO 850X 4TB

Silicon Power US75 4TB

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Last updated 22 minutes ago.

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Brand

SanDisk

Brand

Silicon Power

Model

SDSP81400TAN-000E0
SDSP81400TAN

Model

SP04KGBP44US7505
SU04KGBP44US7505SN
SP04KGBP44US7505AY

Release Date

📅 February 2026

Release Date

-

* First availability for purchase, it may not correspond to the actual market launch date.

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Price history

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Price history

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Price/GB

$0.33

Price/GB

$0.11

GB/$1

3.01

GB/$1

8.7

Capacity

4000 GB

Capacity

4000 GB

Interface

PCIe Gen4 x4

Interface

PCIe Gen4 x4

NVME

Yes

NVME

Yes

Form Factor

M.2-2280

Form Factor

M.2-2280

-

Options (2)

	1TB Gen 4 $174.79
	2TB Gen 4 $295.79

Comparison and key differences summary

Reasons to buy the SANDISK Optimus GX PRO 850X 4TB:

Reasons to buy the Silicon Power US75 4TB:

63% cheaper, you can save $844.02

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