I got my batch 7 online yesterday and the noise is horrible and I used to think S5 is noisy.
Fans run over 4000rpm and blades are about 50C, air is traveling too fast, screams and resonates badly.
3 x DPS-600 powers take 1400W from wall, I tested power draw upto 1600W.
Customs took 1BTC for sale tax but I have "free" electrics as garage is heated with S7 so I maybe ROI some day.
What did you really expect? One S5 with one jet blaster fan was horrible noise pollution. Then, an S7 with two of them running. The temps aren't even the "real" temps. It's just a temp sensor on the board somewhere. I would always add 10 degrees to the temp shown.
50C, thats very good. You have some leeway here. Air is too fast, yes indeed it make a lot of noise at full speed;
So why are you not reducing fan speed?
2 Fan is actually quieter than 2 fan because the air flow for the same noise is lower.
I was expecting evolution, Bittmaintech have made these machines over two years.
If You put two same size fans in a tube suction fan should bee bigger, flow rate is reduced if it isn't. Fans in S7 have the static fins which restric flow at exit, but at inlet side they reduce turbulence and make inlet air pressure higher. Exit fins are useless and make only noise. If You put hand near exit, machine don't make so much noise.
If you pay almost 2000$ of a machine you shouldn't need to open it first and check if parts have fallen of.
Better thermal epoxy needed or some quality control maybe?
2000$ miner shouldn't overheat and burn if it lose internet.
Not GPUs hanging from wires but still not yet very matured products.
you sir are wrong to say products are not very matured.
The Avalon 6 is far better built then the s-7 but the better build = $$ and a bit less power efficient .
The s-7 is nosiy at high fan speed so lower the fans speed to 40 or 45%. This also fixes the lost internet burn up issue.
Now once the fan is at 40% you may need to drop freq to 575 to keep cool
look at this s-7
using a quality psu not 3 lower end server psu's like you are using
my power is 1200 watts
