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ADATA Premier Pro SP920 2.5" SSD Full Capacity Roundup - Low Cost High Performance

Subject: Storage
Manufacturer: ADATA
Tagged: ssd, SP920, sata, Marvell, adata

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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April 1, 2014 | 11:33 PM - Posted by Randal_46

Great to see a new entry in the 512GB/1TB market. I would argue that now the major data-destroying bugs have been worked out of the SSD controllers, the major factor in the consumer market is price/GB. I'm hoping this new entry helps to force prices down further.

April 2, 2014 | 08:46 AM - Posted by collie (not verified)

we are ever so close to the ssd sweet spot, which i think is about $0.30-$0.35. $300-$350 1TB , or more importantly $175-$200 for 500GB is the point where fast silent ssd technology will be viable in every mainstream system, leaving the spinning drives for ultra budget systems and those of us who need crazy TBs of storage.

April 2, 2014 | 08:58 AM - Posted by BBMan (not verified)

It's good to finally see a competitor for the Samsungs and that there is actually a trend to give a price break to go larger. However, the main thing I worry about is reliability with these things. Only time tells the truth there. Glad you led off with the controller.

April 2, 2014 | 09:23 AM - Posted by Stover (not verified)

The 512GB version would be fantastic in my new SFF build but it is a bit overkill considering I have a 2TB WD Black in there. These seem very promising.

April 2, 2014 | 11:55 AM - Posted by Anonymous (not verified)

I'll take two 256 GB ones (instead of 1 512 GB one) please. #IfYouKnowWhatIMean

April 3, 2014 | 08:47 AM - Posted by Allyn Malventano

Despite the slightly slower writes at that capacity, it's still a better way to go if you can go RAID-0.

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