Which m.2 SSDs will fit in the W550s?

[oblong]

So far I know these requirements:
1. M.2 SATA Key
2. 2242 Form Factor
3. Maybe: Single Sided

That leaves me with Transcendent MTS430s or ADATA SP900 m.2s. I have read that the ADATA ones work, but I cannot find them for sale on eBay. Looking at the MTS430s, it has a chip in the other side, will it really hinder my ability to install this drive?

Thank you very much.

[oblong]

For those of you that are searching for a M.2 SSD that will fit:

1. The Transcend M.2 SSD 430S 512GB SATA III will fit.
2. Heard elsewhere that the ADATA ones wlll too.

Highly recommend the Transcend ones, they are manufactured in Taiwan and has DRAM cache. Same encrypted Arch linux system, boot time on usb took 47 seconds, while the Transcend only took 25. Both measured without password typing time.