|Solid State Drive (SSD) Benchmark Performance Testing|
|Articles - Featured Guides|
|Written by Olin Coles|
|Monday, 22 December 2008|
Page 7 of 12
Do Memory Amounts Matter?
EDITOR'S NOTE: ATTO Disk Benchmark offers basic bandwidth speed results at a low queue depth, and more recent versions now offers broader test settings. ATTO Disk Benchmark uses buffered spot samples, therefore NAND wear conditions on segments tested may impact performance results.
I've seen several reliable sources mention in their analysis of Solid State Drive testing that system memory amounts will impact the test results. Whenever I hear or read something that doesn't seem logical to me, I don't just question it, I question and answer it. This has been the driving force behind the information below, which details the differences between testing with a 3 GB triple-channel CL6 system memory kit, and a 6 GB triple-channel CL8 kit.
Beginning with the Mtron MOBI 3500 on the Intel ICH10 SATA controller, the results indicate that there is no perceivable difference between memory sizes. The results are practically identical, even despite the difference in memory timings and module sizes.
Continuing on with our test of the MSD-SATA3535 SSD while attached the JMicron JMB322 SATA controller, we again see that performance is identical between latencies and amounts.
One surprising by-product of this test is the difference between controller chips. The Mtron 3500 performed at 107.2 MBps write and 99.0 read on the ICH10, while recording an identical 107.2 MBps write and 98.0 on the read performance. So in ATTO Disk Benchmark v2.34 it appears that there is very little disparity in SSD performance between controllers and RAM. Does this mean that HD Tach was broken all along? Let's do a comparison on it to be sure...
Well, there you go. All these years I've been testing SSD products with HD Tach, and now I'm beginning to see that maybe I should have paid closer attention to the name of the software. It appears that HD Tach is prone to reporting test anomalies, and SSD performance is not only affected by the controller, but also the internal cache of the SSD while the amount of system memory impacts the storage driver's buffer. Lesson learned. Hopefully other technical writers and editors will not be too proud to read my article, or discover this for themselves.