Yet another: the 96Boards[1] DragonBoard 410c[2][3] from Qualcomm has a Snapdragon 410 quad-core Cortex-A53 with a good amount of connectivity and IO interfaces (as per the 96Boards spec) and an Adreno 306 GPU which supports the open source Freedreno[4] GPU drivers (if you have a binary blob allergy). That said, this thing has a whole different performance tier than the TX1, but if you wanted to start poking at 64-bit ARM, this thing might be worth a look, especially with the comparatively low price.<p>[1] <a href="https:&#x2F;&#x2F;www.96boards.org&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.96boards.org&#x2F;</a><p>[2] <a href="https:&#x2F;&#x2F;www.96boards.org&#x2F;products&#x2F;ce&#x2F;dragonboard410c&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.96boards.org&#x2F;products&#x2F;ce&#x2F;dragonboard410c&#x2F;</a><p>[3] <a href="https:&#x2F;&#x2F;developer.qualcomm.com&#x2F;hardware&#x2F;dragonboard-410c" rel="nofollow">https:&#x2F;&#x2F;developer.qualcomm.com&#x2F;hardware&#x2F;dragonboard-410c</a><p>[4] <a href="https:&#x2F;&#x2F;freedreno.github.io&#x2F;" rel="nofollow">https:&#x2F;&#x2F;freedreno.github.io&#x2F;</a>