As they share the same excellent 16MB Samsung cache chip, the X25-M and X25-E have very comparable burst speed. However, Burst speed is almost always cache rather than drive dependant, as evidenced here by the cheap 250GB Seagate drive's high speed thanks a dedicated cache - something that the cheaper SSDs lack.
HD Tach
Average Read
Intel X25-M 80GB SSD
Intel X25-E 32GB SSD
G.Skill 128GB SSD
Patriot Warp V.2 128GB SSD
Samsung SpinPoint F1 1TB
Seagate 1TB 7200.11
Seagate 250GB 7200.10
Western Digital 150GB 10,000RPM Raptor
237.1
230.0
142.5
140.0
92.8
91.1
89.6
82.1
0
50
100
150
200
250
MB/s (higher is better)
Speed (MB/s
Again, average read for the X25-E is very comparable to the X25-M, as both share the same Intel developed disk controller chip, delivering blisteringly fast read speeds over the full drive capacity.
HD Tach
Random Access Time
Intel X25-M 80GB SSD
Intel X25-E 32GB SSD
Patriot Warp V.2 128GB SSD
G.Skill 128GB SSD
Western Digital 150GB 10,000RPM Raptor
Seagate 1TB 7200.11
Samsung Spinpoint F1 1TB
Seagate 250GB 7200.10
0.1
0.1
0.2
0.2
7.8
12.5
13.5
15.1
0
3
5.5
8
10.5
13
15.5
m/s - less is better
Time (milliseconds)
And again, response time is predictably fast, especially in comparison to mechanical drives. Like the X25-M, the X25-E delivers response times of just 0.1ms.
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