Samsung SM951 AHCI SSD Performing Poorly At Sub-4k File Size
Posted: Tue Apr 28, 2015 5:31 pm
Hmmm, comparing my newly installed SM951 to scores that are posted on various review sites, and it's performing extremely well in the larger file read/writes, nearly identical to others results, but is getting killed in 4k tests...particularly high que depth 4k tests.
It's about -45% lower than the marks should be in the following specific test spots:
Anvil 4K QD16 : Scores 98,473 IOPS, should be around 150,000 IOPS
ATTO - Everything Below 64.0 K: Scores are off on 0.5 through 64.0 by -30 to -50%, then magically catch back up to 100% where they should be by 256.0...odd)
CrystalDiskMark 4K Q32T1: Scores 337.2/308.8 while it should be around 512/450
AS SSD 4K-64Thrd: Scores 400/361 while it should be around 680/360
ASS SSD Copy-Benchmark, "Program": Scores 417 MB/s with a 3.37 s duration, should be around 780 MB/s with a 1.80 second duration
HD Tune Pro 5.50 4K random multi (32): 47202 IOPS, should be around 100000 IOPS
I'm running Windows 7 on an MSI X99S Gaming 7 (4x lanes)...any particular OS setting or something that should be checked that would affect the smaller file transfers?
It's strange because what I've listed above are the only areas within each benchmark that were off, the other 20+ measurements within those tests were spot on. Wonder what I'm missing.
My full benchmark results: http://i.imgur.com/iKny0sj.jpg
It's about -45% lower than the marks should be in the following specific test spots:
Anvil 4K QD16 : Scores 98,473 IOPS, should be around 150,000 IOPS
ATTO - Everything Below 64.0 K: Scores are off on 0.5 through 64.0 by -30 to -50%, then magically catch back up to 100% where they should be by 256.0...odd)
CrystalDiskMark 4K Q32T1: Scores 337.2/308.8 while it should be around 512/450
AS SSD 4K-64Thrd: Scores 400/361 while it should be around 680/360
ASS SSD Copy-Benchmark, "Program": Scores 417 MB/s with a 3.37 s duration, should be around 780 MB/s with a 1.80 second duration
HD Tune Pro 5.50 4K random multi (32): 47202 IOPS, should be around 100000 IOPS
I'm running Windows 7 on an MSI X99S Gaming 7 (4x lanes)...any particular OS setting or something that should be checked that would affect the smaller file transfers?
It's strange because what I've listed above are the only areas within each benchmark that were off, the other 20+ measurements within those tests were spot on. Wonder what I'm missing.
My full benchmark results: http://i.imgur.com/iKny0sj.jpg