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Crucial X9 Pro 1TB vs Lexar SL660 1TB

Compare Crucial X9 Pro 1TB and Lexar SL660 1TB side by side. Both are 1TB USB 3.2 Gen 2 external SSDs, but they differ in speed, design, and value. Here's how they stack up.

Our Pick

Crucial

Crucial X9 Pro 1TB

9.0/10

A 1050 MB/s portable SSD for creators who need TLC NAND, hardware encryption, and a 5-year warranty at less than Extreme Pro prices. The X9 Pro is Crucial's premium Gen 2 line — it targets direct-edit workflows where sustained writes and write endurance matter more than headline speeds.

Real TLC NAND (not QLC)

5-year warranty

AES 256-bit hardware encryption

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Lexar

Lexar SL660 1TB

8.1/10

A premium 2000 MB/s Gen 2x2 portable with an aluminum body and an RGB-lit Logo. The RGB is a divisive feature but the performance is real, and the build quality distinguishes it from cheaper Gen 2x2 peers like the Patriot Evlvr.

Gen 2x2 2000/2000 MB/s

Aluminum body

3-year warranty

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Spec Comparison

Spec

Crucial X9 Pro 1TB

Lexar SL660 1TB

Read Speed

1.1 GB/s

2.0 GB/s ✓

Write Speed

950 MB/s

2.0 GB/s ✓

Capacity

1 TB

Interface

USB 3.2 Gen 2

USB 3.2 Gen 2x2

Endurance (TBW)

600 TB

Warranty

5 Years ✓

3 Years

Score

9.0/10 ✓

8.1/10

Total Wins

2 wins

Frequently Asked Questions

Which is better, Crucial X9 Pro 1TB or Lexar SL660 1TB?

The Crucial X9 Pro 1TB scores 9.0/10 compared to 8.1/10 for the Lexar SL660 1TB. Our expert analysis favors the Crucial X9 Pro 1TB for its superior value.

What's the difference between Crucial X9 Pro 1TB and Lexar SL660 1TB?

The key differences: The Crucial X9 Pro 1TB offers 1,050 MB/s reads vs 2,000 MB/s for the Lexar SL660 1TB. Capacity options differ: Crucial X9 Pro 1TB is 1TB while Lexar SL660 1TB is 1TB. The Crucial X9 Pro 1TB uses USB 3.2 Gen 2 while the Lexar SL660 1TB uses USB 3.2 Gen 2x2.

Which is faster, Crucial X9 Pro 1TB or Lexar SL660 1TB?

The Lexar SL660 1TB is faster with 2,000 MB/s read speeds compared to 1,050 MB/s for the Crucial X9 Pro 1TB. That's a 90% speed advantage.

Which has better value, Crucial X9 Pro 1TB or Lexar SL660 1TB?

The Crucial X9 Pro 1TB scores higher (9.0 vs 8.1/10), indicating better overall value in our evaluation. Check both models on the retailer's site for the latest details.

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