Don't try 1.35V DDR3, it is not supported by Ivy Bridge desktop processors like the 3770S (see vol. 1 Intel 3rd Generation Processors, page 11). Kind of irritating because I thought power saving was a major point with Ivy Bridge. I confirmed this with Intel Help Desk: no DDR3L 1.35V memory is supported by these processors.
Next note, about half of the Intel spec sheets list the memory as "240-pin DDR3..." but this is not the case. The DQ77KB uses DDR3 notebook 204-pin SODIMMs. The supported memory is CL-9 for 1333MHz, and CL-11 for 1600MHz. I wanted to squeeze either the voltage or the CL, but officially, according to Intel, you can't. If you are thinking of saving power by installing one SODIMM at 16GB instead of two SODIMMs at 8GB, no dice. Confirmed with Intel Help Desk: Max 8GB per socket.
Next note, while the DQ77KB has four USB 3.0 ports, they are all hard-wired to the back of the panel. No internal headers for USB 3.0, hence no front panel USB 3.0.
Next note, the power supply is an external 19V "laptop" brick, maximum amps for using the external connection is 8 amps or about 160W. Mini-box has what looks like the highest watts available in this category: PWR-ACDC-19V-8.4A-160W
Final note, the PCI-e 3.0 socket is only four lanes. I wanted to pipe this to an ExpressCard socket on the back panel, but ExpressCard is only one lane. So stick with Intel graphics onboard and abandon the PCI-e 3.0 or find a compatible card that will fit in the case you have to use.
That said, the DQ77KB is the best board I have seen in this form factor. I compared it to the similar DH77DF and did not find any reason to use the fatter DH77. DQ77KB even has a legacy serial port header--I can connect my 10-year old dive computer!
Hope this helps!