TRIM performance was excellent too, with only the tiniest of 1MB/sec wobbles in sequential performance despite over 500GB having been written to the 64GB drive. Random read speeds were similarly unaffected, although we did notice, as with the C300 256GB, a slight drop in random write performance following extended use; the random write speed dropped by roughly 12 per cent. As the random write latencies weren’t affected, this isn’t of great concern and even after heavy use the drive was still fast, responsive and a pleasure to use.