So after tearing these things apart and figuring out how they work (driver for these are open source as well which is cool), pretty sure that bitmain is purposely shipping these to underperform. The actual boards are built to output way more power than they currently are with shipped settings.
I've been able to play with the voltage controller on the boards and have them hashing at over 600mh currently with same power draw lol. I might try a over volt/ over clock and see what I can push them at within the thermal envelope.
Your joking, that is absolutely insane and on a new level of scummy/scammy. So they are running these things at 20% higher hashing power in their own facilities, but then shipping them with crappier settings so that they keep a higher percentage of the network without having to do squat. That is pretty shitty, even for them.
Or we accept the other side of the argument and suppose that they are idiots who didn't know they could be pushed that far, seems unlikely though.
Push them at your own risk. I have not seen this overbuilt rock solid miner you speak of. Pull it apart and it is the same garbage that Bitmain sells.
I have been playing around the world with hash boards and controllers for the L3's at stock settings since about a month after I received them and still have a miner down awaiting parts repairs. So no WAY would I even attempt to turn up the clocks. If I were to turn up anything it is going to be the fans to keep those inner boards cool. Proceed at your own risk... Pay attention to those interior board temps and HW errors. I think this is a bad idea.
Well I'm speaking from a purely engineering standpoint, and compared to the last thing I bought (used) from bitmain being an S5 they have pretty much perfected these miners. Also the last scrypt machines Ive used were Zeus/Alcheminers (which were crap, and almost all 500 units of alcheminers sold are running my firmware these days which fixed alot of issues with them).
I know you bought in early with the L3, which seemed like were the guinea pig test bed for their L3+'s, but I really cannot find anything wrong with the L3+ from a technical perspective. The thermal engineering alone is impressive...these things have chip densities rivaled by immersion boards(more on that in a bit), on air cooling. The serial design is also pretty rock solid. At the top there is a voltage regulator that actually regulates the input voltages divided by the serial chain (which their previous machines did not do and was one of the reasons for fried boards). The actual regulator has an inductor rated for 40 amps, plus dual high side mosfets rated for 60 AMPS continuous EACH. For comparison the typical power draw of each board at stock settings is about 15-16 amps. Thats WAY overbuilt by cheap miner engineering standards.
So back to immersion, my guess is that Bitmain is running these boards for their hashnest cloud in immersion coolers, and probably have them running at near the maximum capacity of the regulator (which is 30-40 amps). I would not be surprised if they have them hashing in the 800mh range. I might break out my immersion prototype tank for these and see what I can do
https://www.youtube.com/watch?v=p5-BaH8_SAk