In HD Tune's sequential read test, the factory Hitachi drive speed varies from roughly 40MB/s down to 20MB/s, with a resulting average throughput of around 30MB/s. As we see with any conventional hard drive performance plotted on a graph, there is a marked decreasing curve as the armature travels the surface of the platter. Although laptop hard drives traditionally fall behind desktop drives in performance, 30MB/s is easily less than half the performance attainable with a modern 3½" SATA drive, as evidenced by our recent Western Digital 1TB drive test. Also of particular note is the relatively high 14.4ms access latency.
Using the same benchmark, the KingSpec drive tops out at 56MB/s and nearly maintains that speed throughout the test, averaging 54MB/s overall. By all appearances the ATA100 interface may be limiting the drive's bandwidth. When drive performance graphs a relatively straight line like this it usually means it's being throttled. You typically see these kind of results for example on an external hard drive connected via USB, where bandwidth is usually capped around 35MB/s. Note also the super low access latency of only 0.2ms, one of the inherent benefits of solid state drives. I did take notice that the CPU utilization was higher with the KingSpec drive however.
Next let's try another disk benchmark, ATTO.