I would venture to say that HashFast's implementation of 28nm process is not as good as it gets, and is more of a race to the market type design.
I think Cointerra will beat them in electrical efficiency judging by their resumes. "CoinTerra boasts a highly experienced engineering team of semiconductor architects and designers who have previously designed some of the worlds highest performance CPUs, GPUs and chipsets for NVIDIA, Intel, Samsung, Qualcomm and Nortel. Having worked on several generations of low-power mobile devices, our team brings tremendous experience in power efficient circuitry, design methodology and implementation to the exciting new frontier of Bitcoin mining. "
They are claiming "significantly less than a watt per Gh/s" on their 28nm product.
I think Cointerra will beat them in electrical efficiency judging by their resumes. "CoinTerra boasts a highly experienced engineering team of semiconductor architects and designers who have previously designed some of the worlds highest performance CPUs, GPUs and chipsets for NVIDIA, Intel, Samsung, Qualcomm and Nortel. Having worked on several generations of low-power mobile devices, our team brings tremendous experience in power efficient circuitry, design methodology and implementation to the exciting new frontier of Bitcoin mining. "
They are claiming "significantly less than a watt per Gh/s" on their 28nm product.
Considering we already see <0.7w/GH on 55nm parts, qualifying the claim with "significantly less" as rather arbitrary for 28nm tech. I want to see these come down to fractions
