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IO Meter
We compared the 240 GB Intel 520 solid state drive (in both SATA 6 Gb/s and SATA 3 Gb/s modes) to its predecessor, the Intel X25-M G2. If you wish to see how the Intel 520 SSD compares to other solid state drives, take a look at our Solid State Drive Performance Comparison Guide, which we will be updating shortly.
Do note that these results are based on the average of separate tests using compressible and non-compressible data. This is to address the fact the newer SSD controllers like the SandForce SF-2281 compress data for better performance and lower wear on the memory cells.
Throughput (Random Access)
Test |
Intel 520 (6 Gb/s) |
Intel 520 (3 Gb/s) |
Intel X25-M G2 |
Difference |
512 KB Read |
369.16 MB/s |
266.35 MB/s |
195.49 MB/s |
+ 88.8% |
512 KB Write |
234.78 MB/s |
252.56 MB/s |
102.66 MB/s |
+ 128.7% |
4 KB Read |
55.12 MB/s |
57.89 MB/s |
21.36 MB/s |
+ 158.1% |
4 KB Write |
73.07 MB/s |
73.09 MB/s |
53.95 MB/s |
+ 35.4% |
Random Access Time
Test |
Intel 520 (6 Gb/s) |
Intel 520 (3 Gb/s) |
Intel X25-M G2 |
Difference |
512 KB Read |
1.42 ms |
1.97 ms |
2.68 ms |
- 47.0% |
512 KB Write |
2.24 ms |
2.08 ms |
5.11 ms |
- 56.3% |
4 KB Read |
0.09 ms |
0.07 ms |
0.19 ms |
- 55.3% |
4 KB Write |
0.06 ms |
0.06 ms |
0.08 ms |
- 25.0% |
CPU Utilization (Random Access)
Test |
Intel 520 (6 Gb/s) |
Intel 520 (3 Gb/s) |
Intel X25-M G2 |
Difference |
512 KB Read |
0.72% |
0.73% |
0.50% |
+ 44.4% |
512 KB Write |
0.70% |
0.83% |
0.40% |
+ 75.9% |
4 KB Read |
4.99% |
5.30% |
5.98% |
- 16.6% |
4 KB Write |
6.86% |
6.90% |
2.25% |
+ 205.6% |
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• The 240 GB Intel 520 Series SSD |
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• The SSD Controller, The Flash Memory |
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• Testing The 240 GB Intel 520 SSD |
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