Review Index:

ADATA XPG SX900 128GB SSD Full Review - Low Cost SandForce

Subject: Storage

IOMeter - Average Transaction Time (rev 1)

Back with the Kingston SSDNow V Series 40GB review, I revised the layout of these graphs to better show SSD latency and access time.  First, I have removed HDD results as they throw the scale too far to tell any meaningful difference in the SSD's you are trying to focus on.  Second, I have reduced the queue depth scale down to 4.  In practical terms of a running OS, queue depth is how many commands are 'stacked up' on the SSD at that time.  An SSD is so fast at servicing requests that typical use will rarely see it increasing past 4.  In the cases where it does, there is so much going on that you are more concerned with IOPS and throughput at that point than transaction time.  The below charts are meant to show how nimble a given SSD is.  Think of it as how well a car handles as opposed to how fast it can go.

Some notes for interpreting results:

  • Times measured at QD=1 can serve as a more 'real' value of seek time.
  • A 'flatter' line means that drive will scale better and ramp up its IOPS when hit with multiple requests simultaneously.

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February 6, 2013 | 08:45 PM - Posted by Anonymous (not verified)

Firmware 5.0.2a still has issues and they were resolved in 5.0.3. The newest SandForce firmware is 5.0.5 and it's very good. Too bad ADATA can't get their firmware act together.

September 9, 2014 | 07:07 PM - Posted by Merry (not verified)

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February 7, 2013 | 03:21 AM - Posted by Jr. Tek Pro (not verified)

I have tested my SSD with newest SandForce firmware 5.0.5
Having troube on that one as well. B-S-O-D :(

You guys can download IOMeter 2010 from

Play around with it and tested 4K random write via IOMeter 2010
See if you have same test result

32G SSD => BSOD, 0xF4
64G SSD => BSOD, 0xF4

bty, can someone tell me where we can download 5.0 B?
One of my friend said 5.0 B will be available shortly.
Is this truth?

February 8, 2013 | 03:27 PM - Posted by ezjohny

I think I'm going to get this SSD for my next build, looks promising and good for the price! I'm a casual PC gamer!

March 28, 2013 | 10:10 AM - Posted by Anonymous (not verified)

ADATA just releases updated firmware for SX900 SSD drive. It is now at Firmware 5.0.7a

March 28, 2013 | 10:53 AM - Posted by Anonymous (not verified)

Adata Firmware 5.0.7a release notes do not metion anything about TRIM being fixed... WTF?

April 15, 2013 | 02:09 PM - Posted by Anonymous (not verified)

"ADATA first with SandForce 5.0.7a firmware, TRIM enabled for ADATA SSDs"

This is the headline I've been seeing, I assume that TRIM issue have been addressed and that this update has fixes found in previous firmware except the one that was pulled from breaking TRIM.

Purchased 2 drives in January 3013. Went online to get info on how to properly setup the OS (enable TRIM etc). Also used the wipe free space feature of ccleaner. CrystalMark always gave me good results except for write speed which is around 250 instead of 500 like the read speed.

Bottom line, I had the expected performance even without this firmware. I'll install it tonight but cant see myself getting much of a boost (write speed).

December 24, 2013 | 06:53 AM - Posted by Lowest Price (not verified)

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