Be careful which ASUS Zenbook SSD you pick up

Subject: Mobile | March 12, 2012 - 04:00 PM |
Tagged: ultrabook, ssd, asus zenbook, asus

The SSD Review stumbled upon a dirty little secret about the ASUS Zenbook SSD; specifically the SSD part of the name.  It seems that when you buy one, you might be picking up a model with an AData XM11 SSD or it might be a Sandisk U100 but unfortunately they are the same price and a similar model number making them very difficult to tell apart ... until you use it.  The SandForce drive AData drive is significantly faster than the Sandisk drive which uses its own proprietary controller.  The difference is not crippling but it is certainly noticeable when benchmarking and using the system.  The final result was that size does matter, the 11.6" UX21 has SandForce while the 13.3" UX31 does not, though both are still very nice Ultrabooks.

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"If we told you that we spent $2400 to right a wrong in proving something that you as a consumer should be aware of, would you believe us? This report closely examines the ASUS Zenbook. Within the ‘Zen’, ASUS may provide either of two SATA 3 SSDs, these being the AData ‘SandForce Driven’ XM11 or the Sandisk U100. There is no price difference between the two, the product number is the same and the consumer has no way of knowing which they will receive. The performance drop between the two is somewhat unbelievable, however, and we thought this report important enough to invest in one of each Zenbook to educate the consumer on the reality of their potential Zenbook purchase."

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Source: SSD Review
March 12, 2012 | 05:53 PM - Posted by Anonymous (not verified)

Wow first screwed up the transformer prime and now this. Real smooth Asus, doesn't take long to ruin your reputation with enthusiasts know..m the people that would actually spend 2400 on a laptop.....

March 12, 2012 | 07:07 PM - Posted by Cristian Kleuser (not verified)

"The final result was that size does matter, the 11.6" UX21 has SandForce while the 13.3" UX31 does not, though both are still very nice Ultrabooks." - That's not entirely true, because I have the UX31E-DH52 model and it came with the ADATA 128GB XM11 SSD sandforce driven. Other interesting detail was that actually there was a SandForce sticker on the retail box.

March 13, 2012 | 01:06 PM - Posted by Jeremy Hellstrom

So it is even more confusing than they thought? Lovely.

The sticker helps if you are picking it up in a retail store but if you ordered online it doesn't help as much. Glad to hear you got the 'good one' though.

March 13, 2012 | 05:46 PM - Posted by Octavean (not verified)

I’m not sure why ASUS insists on using lackluster Sandisk SSD units. Although in this case one would hope that it is to supplement the preferred higher performance part (stock). The Asus Eee Slate EP121 Windows 7 PC Tablet is also afflicted with a lackluster Sandisk SSD. In this case its mSATA but it is in every unit without exception. At least you have chance with the Zenbook.

March 31, 2012 | 12:44 PM - Posted by Anonymous (not verified)

I find an interesting video on YouTube.
Its talking about the Sandisk SSD compared with ADATA that use in Zenbook.
Check it ! LOL

February 26, 2013 | 02:11 PM - Posted by Steve (not verified)

Where can I purchase either a Sandisk SDSA5JK-128 or ADATA XM11 128? I have searched everywhere including contacting ASUS parts department to no avail. Thank you

March 22, 2013 | 06:57 PM - Posted by anto (not verified)

Would also love to know too.
Please respond :)

August 3, 2013 | 11:13 AM - Posted by Eric (not verified)

Just bought a UX31 and it has a 256Gb ADATA XM11.

October 13, 2013 | 03:02 AM - Posted by Anonymous (not verified)

Does it mean that you can either of the ssd's ie (adata xm11 or sandisk u100) on the ASUS ux31e?
I need to know if I buy one of them it will still work on the ultra book.

April 29, 2014 | 06:43 PM - Posted by Anonymous (not verified)

I happen to have a Sandisk SDSA5JK-128 available. I bought a UX31A and immediately upgraded the mSATA SSD cuz I was able to grab then at such an incredible price. Otherwise I wouldn't have even considered doing it. If someone wants it just let me know and I'll hook you up.


May 20, 2014 | 09:57 AM - Posted by Anonymous (not verified)

Where did you pick them up at a cheap price??

October 9, 2014 | 04:56 AM - Posted by Larfe (not verified)


maybe you can help me. My ADATA XM11 ist broken and I'm searching for an alternative. Which SSD do you have now?


November 10, 2014 | 11:13 PM - Posted by Anonymous (not verified)

My UX31 hard drive just's a SDSA5JK-128...I've been searching for a replacement and not sure how many choices I might have... Can you shed any light here...I'm going nuts! Thank you!

May 20, 2014 | 02:46 PM - Posted by Anonymous (not verified)

I'm interested. Is it still available? My SSD on a UX-31E just failed - now only a ROM.

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