I have a Zenbook UX31A. Am I able to upgrade the SSD?

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Thank you for replying. Looking at the unit, it looks like the ASUS Zenbook UX31A has a custom SSD Drive. The hard drive 128 or 256gb SSD is like a memory stick with a new special connection which is not sata or msata. The UX31A comes with either a Sandisk U100 or a ADATA XM11 (Sandforce 2281 controller) Proprietary SSD * Hard to disassemble custom SSD Drive and a Samsung SSD 840EVO as an upgrade may not be possible.

The only option of selecting the SSD drives is to choose between a Sandisk U100 or a ADATA XM11. The Sandisk U100 is truely one of the worst SSDs that you can get these days. Although still better than a traditional HDD, when compared to the ADATA XM11 or the Samsung 840 you can see how poorly it performs as a SSD.

SSD performance comparison: Sandisk vs ADATA

I would still suggest an ADATA XM11 as the best SSD for this unit.

Samsung drive has a SATA interface. You need to mount the drive to your computer chassis and use a SATA cable to connect it. In general I have heard of SSD products featuring PCIe, mini PCIe, miniDIMM. There are PCI to PCIe adapter cards, but I am not sure that it wouls still fit the UX31A and the final speed will satisfy your expectations.

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