Here are the current values of the HDTune Seagate ST3500418AS
Transfer Rate Minimum: 64.7 MB / sec
Maximum transfer rate: 131.6 MB / sec
Transfer rate Average: 103.3 MB / sec
Access Time: 14.2 ms
Burst rate: 198.6 MB / sec
CPU Usage: 2.3%
for comparison, a somewhat aged 500GB SAMSUNG HD501LJ
Transfer rate minimum: 4.5 MB / sec
Maximum transfer rate: 81.4 MB / sec
Average transfer rate: 59.5 MB / sec
Access Time: 14.3 ms
Burst rate: 149.4 MB / sec
CPU Usage: 1.6%
and also the current 2TB drive Seagate ST32000641AS
Transfer Rate Minimum: 66.3 MB / sec
Maximum transfer rate: 135.9 MB / sec
Transfer rate Average: 109.5 MB / sec
Access Time: 13.8 ms
Burst rate: 164.6 MB / sec
CPU Usage: 2.4%
As you can see, this plate with the 2TB version is on
Par.