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Benchmarks: PCMark 7
The PCmark 7 importing pictures test saw the WD Black 4TB sustain a throughput of 8.9MB/s, making it 6% faster than the WD RE 1TB and 24% faster than the Hitachi Deskstar 7K1000.C 1TB. However it was 10% slower than the Velociraptor and 70% slower than the Samsung SSD 840 Pro 512GB.
The performance of the WD Black 4TB was average in the PCmark 7 video editing test with a throughput of just 18.6MB/s. This meant that it was only able to match the performance of the Hitachi Deskstar 7K1000.C 1TB. That said it wasn't a great deal slower than the WD RE 1TB and only trailed the Velociraptor by a 10% margin and the Samsung SSD 840 Pro 512GB by an 18% margin.
The PCmark 7 starting applications test shows just how much faster a modern SSD can be when compared with the best mechanical hard drives. The WD Black 4TB managed a transfer speed of 4.1MB/s, which was roughly the same performance provided by the WD RE 1TB, while it was 18% less than the Velociraptor. However when compared to the Samsung SSD 840 Pro 512GB the WD Black 4TB was 93% slower or in other terms the SSD was over 15x faster.
Finally the PCmark 7 gaming test and here the WD Black 4TB managed 5.5MB/s, making it 17% faster than the WD Red 3TB. However it was also 8% slower than the WD RE 1TB and 27% slower than the Velociraptor, while it trailed the SSD by a 69% margin.