512GB Class Performance Testing
Most of the drives in the comparison chart have matured over the last year with most coming to market in early 2018. The MyDigitalSSD BPX Pro being the exception. It's the other next-generation SSD to join the SX8200 Pro. This capacity class carries a wide range of prices with the entry-level drive (MyDigitalSSD SBX) starting at just $49.99 and the high-end (Intel 760p) at $84 with all prices taken at the time of writing.
Sequential Read Performance
The 256GB ADATA SX8200 Pro takes over where the larger models we tested left off. In the sequential read test the drive shows total dominance at low queue depths (QD) and reaches peak performance of 3,500 MB/s at QD4.
Sequential Write Performance
With limited NAND die, the 256GB SX8200 Pro doesn't have the same bandwidth available through parallelization as the larger drives. That's why the specifications show it as the slowest of the three we've tested thus far. We managed to reach 1,150 MB/s in the sequential burst test.
Sustained Sequential Write Performance
The 256GB SX8200 Pro also has a smaller SLC buffer than the other drives in the series. The drive uses a dynamic buffer, so it also shrinks as you add data to the flash.
Random Read Performance
The SX8200 Pro's superior random read performance isn't as high as the larger models, but the 256GB drive still has a strong lead over other 256GB class drives shipping today.
Random Write Performance
The drive also sports a very quick random write speed at low queue depths.
70% Read Sequential Performance
The weak point for the entire SX8200 Pro series is the mixed sequential performance. The drives all deliver strong performance but they don't scale as well as many of the others. The 256GB SX8200 Pro has a sequential mixed workload ceiling of just over 1,000 MB/s.
70% Read Random Performance
The 256GB SX8200 Pro doesn't have the same issue with mixed random workloads. The drive outperforms the other top 256GB drives in this area at low queue depths.
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