Sign in to follow this  
gobbleDgook

SSDs much slower than online reviews

Recommended Posts

I have a Mushkin Callisto DX 120 GB that filled up so I got an Adata SX900 256 GB this week. Both have speeds much lower than the reviews I've seen, like 30-60% slower. The SX900 ramdom 4k read/ write is actually slower than the Mushkin and the Adata seems a bit slower loading game levels. The reviews typically test new drives with no data, which is completely worthless. So does actually putting data on them slow them down this much or is it something else? I updated SATA3 driver (trivial difference) and SX900 firmware was up to date.

Mobo: ASRock X58 Extreme3

CPU: i7-940

6 GB triple channel ram

Both drives NTFS, SMART enabled, standard Windows formatting

SX900 on SATA3

Mushkin on SATA2

See attached crystal disk mark results.

Any ideas?

post-100395-0-35307400-1379993720_thumb.

Share this post


Link to post
Share on other sites

One major problem regarding your SX900 SSD is that you connected it to a slow controller, the older addon controller from Marvell or JMicron can't provide full SSD performance. Often it is a better idea to connect to the SATA 2 controller to get better IOPS.

If the Calisto is a old Sandforce I drive also these values can be fine, the drive can get so slow in used state.

Share this post


Link to post
Share on other sites

Agreed, in my experiences with Marvell controllers on X58 boards, you are better off using the Intel SATA II in AHCI mode. I would probably also secure erase the Mushkin if it "got filled up." I've done that a number of times with similar drives and it brought them back to expected performance levels.

Edited by Slade

Share this post


Link to post
Share on other sites

Thanks guys. Yes it's better from SATA2 port. It figures I got a better mobo so I could upgrade to a SATA3 drive later (now) and it's slower. At least where it counts, for small random data with no queue. ATTO 4kb read QD0 rate almost doubled going from SATA3 to 2.

post-100395-0-09659900-1380343381_thumb.

post-100395-0-61310800-1380343395_thumb.

post-100395-0-09949100-1380343832_thumb.

post-100395-0-09546300-1380343840_thumb.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Sign in to follow this