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External SSDs

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Crucial X9 Pro 1TB vs Lexar SL660 2TB

Compare Crucial X9 Pro 1TB and Lexar SL660 2TB 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
Check on Amazon →

Lexar

Lexar SL660 2TB
8.2/10

The 2TB SL660 doubles SLC cache budget over the 1TB. RGB and aluminum body preserved — a competitive Gen 2x2 2TB at moderate pricing. Worth comparing with the Kingston XS2000 2TB and Patriot Evlvr 2TB.

Gen 2x2 2000 MB/s
2TB storage
Aluminum body
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Spec Comparison

Spec
Crucial X9 Pro 1TB
Lexar SL660 2TB
Read Speed
1.1 GB/s
2.0 GB/s ✓
Write Speed
950 MB/s
2.0 GB/s ✓
Capacity
1 TB
2 TB ✓
Interface
USB 3.2 Gen 2
USB 3.2 Gen 2x2
Endurance (TBW)
600 TB
1,200 TB ✓
Warranty
5 Years ✓
3 Years
Score
9.0/10 ✓
8.2/10
Total Wins
2 wins
4 wins

Frequently Asked Questions

Which is better, Crucial X9 Pro 1TB or Lexar SL660 2TB?
The Crucial X9 Pro 1TB scores 9.0/10 compared to 8.2/10 for the Lexar SL660 2TB. 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 2TB?
The key differences: The Crucial X9 Pro 1TB offers 1,050 MB/s reads vs 2,000 MB/s for the Lexar SL660 2TB. Capacity options differ: Crucial X9 Pro 1TB is 1TB while Lexar SL660 2TB is 2TB. The Crucial X9 Pro 1TB uses USB 3.2 Gen 2 while the Lexar SL660 2TB uses USB 3.2 Gen 2x2.
Which is faster, Crucial X9 Pro 1TB or Lexar SL660 2TB?
The Lexar SL660 2TB 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 2TB?
The Crucial X9 Pro 1TB scores higher (9.0 vs 8.2/10), indicating better overall value in our evaluation. Check both models on the retailer's site for the latest details.

More Comparisons

Crucial X9 Pro 1TB vs Samsung T9 2TB → Lexar SL660 2TB vs Samsung T9 2TB →
Crucial X9 Pro 1TB vs Samsung T9 Portable SSD → Lexar SL660 2TB vs Samsung T9 Portable SSD →
Crucial X9 Pro 1TB vs Crucial X10 Pro 2TB → Lexar SL660 2TB vs Crucial X10 Pro 2TB →
Crucial X9 Pro 1TB vs Samsung T7 4TB → Lexar SL660 2TB vs Samsung T7 4TB →