Interesting.... the large heatsink on teh 276mm board is the 120T.

I've only had 6-7 of those particular variants and actually yes - 1 of them DID ship with 2 faulty hashboards (only detecting 35 and 49 chips of the 77) rendering the machine inoperable. I only had 1 of DOZENS of the 115T (individually pasted heatsinks on the 266mm board) that shipped DOA.