Samsung claims a write throughput of 220MB/s and we saw up to 260MB/s for the 128K test and 224MB/s for the 32K test. This placed the Samsung 470 Series 256GB within striking distance of the OCZ Vertex 2 40GB and Vertex 2 Pro 100GB SSDs, while topping the Crucial C300 256GB for the 32K and 128K tests.