It seems like there is a relatively new company providing more efficient mining equipment. The name of the company is pandaminer, and it seems that, using the equipment provided by them, it is possible to mine cryptos like Monero, ZCash and Ethereum.
I haven't tested it, but there is more information here: https://bitcointalksearch.org/topic/pandaminer-b3-pro-new-batch-releases-with-only-800-1750-1668461
I haven't tested it, but there is more information here: https://bitcointalksearch.org/topic/pandaminer-b3-pro-new-batch-releases-with-only-800-1750-1668461
It's no more efficient than a well-tuned standard multi-GPU rig.
It also costs more per GPU than if you can do it yourself.
It IS fairly compact, and if you're not good at building your own hardware it would be a viable option.
Certainly less resale value though, compared to buying GFX cards which can always be sold onto gamers easily when you're done with them.
