The Silicon Power Velox V30 60 GB SSD is designed in a way that it uses only half of the Sandforce SF-2281's channels; think of them as independent paths between the controller and NAND flash memory chips, where your data is stored. With only eight flash chips used, the bandwidth between the Sandforce controller and the memory chips is cut in half - SF-2281 supports 16 chips.
As a result we see disappointing performance in all our tests that operate on large chunks of data, or large file transfers in general. In other tests, we see surprisingly good performance, especially where small random accesses are involved in. The good performance in this scenario seems to be a result of some Sandforce magic, this is the first time we see this kind of behavior.
Even if it might not be the fastest drive, it is still an SSD, which means the V30 60 GB offers a huge improvement in access time over any traditional HDD, resulting in a much smoother and snappier experience.