To achieve that power draw, you just need to underclock the core and undervolt. Again, this can be accomplished with a variety of utilities, or written into the BIOS. To be honest, the 365 MH/s with 1900W isn't even exceptional in terms of efficiency for a GPU eth mining rig.
True. Easier, but it's all a PITA, takes time and knowledge. I do find it's much easier to underclock/undervolt via a kernel module as it's easy to change all at once. That means bioses are programmed with straps, undervolt and power draw(s) only once and you don't have to mess with them again to optimize. And I don't know the actual draw at the wall because my power meter is 110, but I could check if you're interested and we can see if it's still lower -- I've been doing it this way since eth was a couple bucks so might be outdated.
I have seen faster and more stable cards from also undervolting the PCI bus, and my over-reaching goal of month-long-at-a-minimum stability (these are aging 470 4GB cards) seems to be peaked at around 28 Mh/s for them, a speed not able to be held without tweaking the kernel. Sure, they can go higher, and 580 8GBs even more so, but prices for those 580s are crazy now, and stability goes down pretty quickly above those speed. I've observed that 24-hour-rolling hashrate on ethermine is higher when the cards throw zero errors and thus are at a slightly lower "reported" rate. Not really scientific, but I haven't seen a rolling average at or above reported from other miners doing it differently.
Pus zero downtime is good. Stability is great. Let's me goof off here.
😀
I can't imagine running a remote cluster of miners (even if it's just the distance from home to work) that can't be scripted with keyless secure shell login, full access to the power of a unix system to monitor, report, diagnose and one-script update every machine to change anything you want. And work life without cron and bash scripts? That's just crazy talk. All of that is a barrier to entry for gigahash+ meaningful returns for small businesses -- even with EthOS, most people just don't want to deal with unix and have to pay someone to do it -- and thus a barrier to adoption, which is bad IMHO.
But, yes, it's getting easier. The ability to one-click-strap-time is awesome! And relatively new. Beats the hex editor days for dual bioses for sure. But still out of reach of the standard non-game-rig-builder Windows PC enthusiast, which again is bad for adoption. For the E3, all you need to understand is how to plug in PCIe connectors, RTFM to know the simple login to the web interface and where to put your account information in. Making mining ethash so easy is good for decentralization (if you can actually get the miners) and I think good for adoption and use of ETHASH coins overall, not just Ethereum.
If you can just reprogram the circuit functionality, it's not an ASIC. The BlissZ FW you refer to doesn't modify the hashing algorithm (nor could it), which is what would be required to adapt to a hard fork.
Also true -- D3s can only mine X11 algo -- but missed the point that the cgminer binary can be changed, and as long as any hard forks don't create a new algo (ala CrytponoteV7) D3s and BlissZ (and anyone that can make a ROM) can adapt to changes in X11 as long as the changes conform to the X11 algo. And so it should be with the E3. I'm not familiar with the hardware of the E3 but it seems it has to be more akin to traditional CPU/GPU with a ton of memory than what's considered a one-algo-specific ASIC. That is, ETHASH's memory hardness means there must already be some flexibility in the E3's design, and I do think it can easily adapt to any hard forks, don't you?
Okay, /soapbox time is over, back to work...