Adata SX900 Vs Samsung 840 EVO

Adata, Samsung, SSD Vs SSD


Looking for a new SSD may not as easy as it seems. The numerous options you can pick in the market add some flexibility to your purchase but also making it harder to choose. Many people are starting to move to SSD because it is proven to enhance their computer significantly. In today Adata SX900 Vs Samsung 840 EVO article, we are going to compare these similar yet different drives to give you more information regarding what you can expect from them. If one/both of them took your interest, go check our article below.

In this article, we are going to give you information about:
– What are ADATA SX900 and Samsung 840 EVO
– What ADATA SX900 and Samsung 840 EVO can offer to you
– ADATA SX900 vs Samsung 840 EVO

About ADATA SX900
We know that the market of SSD is very competitive for quite some time now. Many manufacturers are continuously making their product to be more competitive in end-consumer market including ADATA. While the company is not necessarily at the front or leading the market, they always had some interesting product to offer. ADATA SX900 is not new anymore when this article was made since it was released years ago in 2012, but it is still a relevant item if you are looking for a home use solid state drive.

Just like many SSD today, this one comes in 2.5-inch form factor, which make it able to be mounted in most laptop but in case your PC needs a 3.5-inch drive, you can purchase some adapter to mount it.

ADATA SX900 Capabilities
Some manufacturers are manufacturing their own controllers like Samsung and OCZ but some may not and used a third-party products just like ADATA. This drive in particular comes with LSI Sandforce controller, which is a quite popular option at that time. What’s interesting here is now unlike the Sandforce’s SSDs, the RAISE is disabled to give the end user ore usable space. RAISE is the small amount of space that you can’t access in your SSD, which is also combined with over-provisioning.

The Sandforce based SX900 now is having 7% more available storage capacity. In the past, Sandforce take double of that to offer better performance and endurance, but now, there is another way to give back the user this small amount without negatively impacting the performance of the drive as well as the endurance. Taken from anandtech, when tested, it is proven that RAISE doesn’t impact performance.

There is another thing we should mention here, the SX900 seems to have different NAND version, because the earlier drive comes with 25nm IMFT NAND chip on their board while the later version is packed with 20nm NAND and 19nm Sandisk flash chip inside. This version also has updated firmware, which should fix some issued in the earlier SX900 drives. The claims by ADATA is it can reach up to 550MBps/530MBps read/write speed and 4K write IOPS of 91K.

When it was first launched, the drive is available in several capacities start from 64GB, 128GB, 256GB, and 512GB. In present day, the price for 128GB capacity is around $162.99, which makes it down to $1.27 per GB. It is not cheapest drive of course but still can be categorized as affordable. The warranty provided is limited 3 years.

About Samsung 840 EVO
Samsung 840 EVO is just like its name, it is the “evolution” model of the older brother that was launched around a year earlier. Samsung kept being competitive in the market even now and many people are praising the company new move in their SSD just like what they have done in this one. The previous models surprise the market by offering different NAND as well as the first consumer drive that comes with TLC NAND, which is kept that way in the EVO version.

Samsung 840 EVO Capabilities
As it has been said earlier, the 840 EVO still used the same TLC NAND like its older brother but there are some change here because now they moves to a smaller geometry. The company called this NAND as 10nm-class or 1x-nm that can be used to refer anywhere between 10nm to 19nm as well as called as 19nm TLC. Similar like IMFT’s latest 20nm MLC process, this new 19nm TLC is also available in capacities up to 128Gbit per die.

However, Samsung still remains on 8KB page size while the pages per block still like IMFT’s former 64Gbit 20nm MLC at 256. Even though the discussion of MLC vs TLC is not relevant anymore today, it is when the drive was launched. At that time TLC is expected to have 50% longer program times than 2bpc MLC. Together with the NAND update Samsung put on 840 EVO, they also seems to improve the controller.

It is still the same triple-core Cortex R4 design like the previous MD controller but now it runs at 400MHz, which is clearly higher than the previous 300MHz to improve its performance. This upgrade also seen as an update to SATA 3.1 just like in Sandisk’s Extreme II that also bring some features like support for queued TRIM commands.

The drive now has AES-256 encryption with its PSID printed on the drive label, so in the event where you set and lose the drive encryption key, you will still able to unlock the drive even though your data will lost. It also support TCG Opal and Microsoft’s eDrive. Read also: Crucial M500 vs Samsung 840 EVO here.

The drive is available in several capacities start from 120GB, 250GB, 500GB, 750GB, and 1TB. In present day, the price for 120GB is around $152.97 which makes it down to $1.27 per GB with 3 years limited warranty.

Comparison
Now, let’s compare ADATA SX900 with Samsung 840 EVO. The basic difference here is of course the NAND type for SX900 use MLC and EVO use TLC NAND. In performance, taken from a source, the 840 EVO is better than SX900 in random read, write as well as higher IO speed.

Adata SX900 Vs Samsung 840 EVO

- New Expanded Capacity SSD, 7% more drive space.
- SATA 6 GB/sec SandForce 2281 controller
- Sequential Read/Write is 555/530 MB/S
- Up to 85,000 IOPS, Full Windows TRIM Support
- 2.5-Inch to 3.5-Inch Mounting Bracket Included
- Highest-quality components and engineering from the #1 memory manufacturer
- Worry-free data security with AES 256-bit full-disk encryption
- No moving parts means no hard drive spin ups, no noise and superior data protection
- An innovative lightweight design that allows you to work smarter and play longer
- Sequential Read Speed 540 MB / Sequential Write Speed 520 MB / Random Read Speed 97K / Random Write Speed 66K

Conclusion
All in all, the decision is all yours to make. In our opinion, both of them are reliable but when it comes down to choose which is better, based on the simple comparison above, we will recommend you Samsung 840 EVO since it seems to perform better than ADATA SX900. From the price point, they also very similar and depend on the seller, so they may not very far apart with 840 EVO being pricier.

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