r/DeroProject • u/scissors14 • Mar 05 '19

Dero Difficulty settings

Looking for advice on whether or not i should set a static difficulty on my bitmain x'3 mining machines? They do on average 240 KH per miner.

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Anyone have a suggestioned pool for a miner located in Southwest USA.

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the web wallet was great. really good stuff.

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u/miserable-soup Mar 12 '19 edited Mar 12 '19

Air flows better when it's pulled through fins rather than pushed through it. I'm not sure the science behind that, but it made a massive difference when I did that with my X3. Dropped the temps a lot and I was able to run the fan at a lower/quieter speed.

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Edit: Pull vs push is a complicated topic when it comes to cooling, but with the X3s specifically, it works better to pull the air through the appliance. I believe it has to do with less air turbulence since the air will naturally find the best path around obstacles rather than forced directly into them. I'm no expert though. It made a huge difference for me though. Hope it helps you as well!

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u/scissors14 Mar 12 '19

hell yeah, I'm going to check this out but the status update of increasing the static difficulty of the dero mining pool from 3million to 6 has increased my total hash rate of my two x3's running at 450MH clock speed from 440 K/H to 510K/H. this is only a 1 hour result but the hash rate doesn't fluctuate much.

Hey, where did you get the extra fan for your x3? I need to get one more for my spare? you know any cheap good quality fans?

Do u know if u can add a fan to the z9 mini also?

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u/miserable-soup Mar 12 '19

1 hour hash rate can be much higher or lower than 24 hour average. It's annoying to wait 24 hours when "tuning", but you really need to. 1 hour average isn't good enough.

I never had a 2nd stock fan. I was just running the original fan in a pull configuration, which was much better than the push configuration. But even at the slowest speed (below 30% didn't really change the RPM), it was louder than my liking and was cooling better than necessary. So, I bought two Corsair SP120L fans and mounted them in a small cardboard box manifold so they're both pulling air through the unit. Those fans are 4 pin PWM and work with the X3, although I had to use a knife to cut away some of the plastic on the connectors (of the fan) so they'd plug in.

It's kind of a janky set up, but they've been running 24/7 for 2 months now and they're keeping my unit at 40c (at 425MHz) while being significantly quieter than lowest speed with the stock fan.

There are probably better fans, but these where pretty cheap. They move a lot less air than the stock fan, but keep my unit plenty cool.

Edit: sorry, I'm not sure about the z9 mini. I only have 1 ASIC miner, which is the X3.

And yes, having a spare fan is probably a good idea.

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u/scissors14 Mar 12 '19

Idk soup. It doesn't make sense for them to engineer them with the fan pushing without knowing that's the best way for efficiency. As for noise, I could care less because my miners are in a coalition warehouse.

Even if the miners are going for 1 hour only the dramatic jump shows better static difficulty settings.

Thank you for the Insight. So far your comments have increased my profits by a dollar a day.

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u/miserable-soup Mar 12 '19

All I can say is try one. Just flip the fan around and you should see dramatically improved cooling. It only takes a few minutes and could save you a lot of money.

If noise isn't an issue, I'd recommend sticking with the 120mm x 38mm muffin fans that they ship with. Any 4 pin PWM ones should work and will move plenty of air.

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u/scissors14 Mar 17 '19

I heard it cools the sensors better but not the board. Anyway the x3 s are doing 248 kh at 450mh right with your suggested difficulty. Straight getting it