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Compare Samsung 840 PRO 128GB vs SANDISK Optimus GX PRO 850X 1TB Heatsink

The main differences between Samsung 840 PRO 128GB and SANDISK Optimus GX PRO 850X 1TB Heatsink are in Capacity, Interface, NVME and Form Factor.

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Samsung 840 PRO 128GB

SANDISK Optimus GX PRO 850X 1TB Heatsink

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Prices
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In Stock

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In Stock

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Pangoly Score (How do we rate?)

92

Pangoly Score (How do we rate?)

-

Brand

Samsung

Brand

SanDisk

Model

MZ-7PD128BW

Model

SDSP81100TAH-000E0
SDSP81100TAH

Release Date

📅 October 2012

Release Date

📅 February 2026

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

User reviews

★★★★★

(235 reviews)

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User reviews

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Performance (Charts)

258th / 1746

Performance (Charts)

n/a

Effective Value

261st / 336

Effective Value

-

Price history

View Details ►

Price history

View Details ►

Price/GB

$1.17

Price/GB

$0.35

GB/$1

0.85

GB/$1

2.86

Pros

Great performance
Samsung MDX controller

Pros

-

Series

840 Pro Series

Series

-

Capacity

128 GB

Capacity

1000 GB

Interface

SATA 6 Gb/s

Interface

PCIe Gen4 x4

NVME

No

NVME

Yes

Form Factor

2.5"

Form Factor

M.2-2280

SSD Controller

Samsung MDX

SSD Controller

-

NAND Flash Type

MLC

NAND Flash Type

-

MTBF

1,500,000 hours

MTBF

-

Options (1)

Samsung 840 PRO 512GB

512 GB
$299.99

-

Comparison and key differences summary

Reasons to buy the Samsung 840 PRO 128GB:

57% cheaper, you can save $200.00

Reasons to buy the SANDISK Optimus GX PRO 850X 1TB Heatsink:

Newer Product, it was released around 14 years later
More Capacity (+872 GB available)
Newer interface (PCIe Gen4 x4)

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