My version of the S9 Heater

Hey everyone, I've been working on recycling some parts from my miner... I gathered a bunch of components, and it’s kinda cool: - T9 case - T9+ controller - S9 hashboard - My own custom firmware (but it works with LPM and stuff) I tried it out at: - 525mhz/850mv (max temp 62) - 700mhz/910mv (max temp 80) Just keeping an eye on the fan speed and temps, and the room's about 22°C. The results are great!!! Plus, it’s super quiet; the PSU is actually louder lol. And it didn't cost me anything, just needed to make two holes (around 50-60mm). Just to clarify, in my calculations, it's crucial not to make the holes too big to maintain air pressure at the center of the hashboard with a low-speed fan. Make sure to position the holes perfectly in the center on both sides (check the pic to see what I mean). So basically, just rotate the intake fan. And one last thing, super important: airflow for the two external fans... you want the air to come in from the miner and exit outside! The fan blades need to be placed inside... just look at the picture! When you power it on, the air should flow out from the two fans! No intake, the intake is now through the two new holes! Also, you need to have TWO IDENTICAL fans!!! Otherwise, the airflow won't be right, and part of the hashboard might not get enough air and could overheat!

I don't have access to my philipma1957 account and this one does not have any merits. When I get to my philipma1957 account I will drop some serious merits on this. your design is way better then mine . I have a s9 to work on I will do so later today. I will do   a copy of your design.  Nice work. Cheaper then my idea and easy to do.  Nice!

Thanks ! with pleasure I have edit my first post for more precision   And . . . . !!!!!!!!!! HAPPY NEW YEAR !!!!!!!!!!

Here are 12 merits. To anyone  that reads this  he truly took my design and really improved it . Nice job. Lets give him a few more merits as he deserves them.

Thanks ! I'm embarrassed Hum... after reflection, i thinks, is possible to improve efficiency of cooling, by make 2 litle hole (arround 20mm) at two side... In this "project", my idea is make directly flow at center hasboard, but litle problem, the up and down chips at border hashboard is litle more hot, is not a problem (miner show final temp by chips 63 i thinks), but just funny to improve this :p

I think 💭 a few holes on each side may improve even more. maybe a little smaller.  lower 1/3 from intake higher 1/3 from output.       _________________       |   o                        |     <    |                    o       |      <<<<<<<       |________________| this may work better. but your idea 💡 is easy and cheap.

Are both fans exhausting: drawing air in, over the board, from the drilled holes?

__________________     fan flow      |    o                     o   |    fan flow <<<<<<<<<|               O (50mm)  |>>>>>>>>>                      |    o                     o   |                      --------------------------- Is my idea   two side, so 8 new holes arround 20mm i thinks is good size i have expected air flow, and up and down the flow is litle down, so by 8 news litle hole (not to big to respect the pressure) compensate this "problem" for more efficiency

That's an amazing design indeed, however, I have one concern which is the pressure on the fans' motors, I don't know much about physics and airflow, but I think when two fans are pushing air in the opposite directions they will collide with/against each other thus effecting the air flow specially in the middle area. to illustrate more using your design.                       __________________     fan flow      |    o       ***      o   |    fan flow <<<<<<<<<|             ***           |>>>>>>>>>                      |    o       ***      o   |                      --------------------------- where I put the *** is the main area of concern, the hot air around that area may stay there for a little longer than the board can handle ,also both fans need to put extra work to be able to spin against one another, fans are cheap, but if they break every couple days then well !! if i am wrong please correct me

your purpose is true only if the hole is smaller than air flow debit ! the proof is here, temp is very low on my configuration with my design, the hole are sized in fonction, so, if you turn the fan at full speed, ok, the hole is to small for this, but not interrested by this, my idea is make small pressure, just for good flow, at low speed fan ps : Philipma1957, you have try this ? what results ?

right now i am monitoring the solo.ckpool super rental trying to squeeze every dime i can for the ten of us in it. so i did not get to play with the s9 i have at home. i did realize that holes could be covered and various patterns of air flow studied. i e o.            o.           o               O o.            o.           o do all  holes above on the two sides. simply cover a hole with duct tape to tune best heat results. the fans could be <.   >.  maybe best >.    > <.    < >.   <.     i don’t fans will work well this way. it is a project i will get to very soon.

Temp is low might also be due to a few  other reasons, having a single board in the miner is a huge advantage, also I am not sure where the temp-sensor is exactly located, if it's far from the middle, then the reading can be way too off , if i am not mistaken the temp sensor is somewhere near the edge of the board (exhaust side), so in theory, temps in that middle part which i am worried about could very likely be a lot higher than what shows on the miner status. Please don't get me wrong , I am not underestimating your abilities, I know you know much better than me in this field, I am just trying to discuss potential issues which might require some tweaks. Thanks. how?where?what?  did you arrange this on forum? wish you best of luck.

Yeah ! absolut no problem !!!   if you find better idea i take this with pleasure !!! so i don't a god   So, for proof, i have take directly my finger at heatsink !!! VERY COLD at center lol (normal ! is directly in enter air flowing !) and for fan direction, i thinks my solution is better, i don't tell this so this by me, just i thinks is best idea... For fun ! overclock at 800mhz/930mv (hashboard come by 13th model, bad efficiency) by fan fixed at 100% , just look temps ! :p and at this time, i have removed fans, in running mode, and i touch the headsink, and, is not to hot (ambient temp is arround 20c) Ps : i have release my personal firmware for free for all, if you want try and take critique

Can't see pictures but here is something that may be interesting for you to know: Consider using a dremel to make non circle holes (such as square or octagon). Circles make more noise (like a flute). Just remember: to reduce noise, avoid circles. Someday i will try your idea, when i move to a country with actual winter.

Yes i totaly agree by this ! but on this mod, the pressure is very low! so, absolute not noise by holes, only litle noise by fan

Love your project. Do you have a link to your firmware? Thank you.

I think this is the his firmware which he now gives for free according to the information he added to the thread > https://bitcointalk.org/index.php?topic=5127323.0 Despite the doubts raised by respected member Kano, I for some reason think that thierry4wd was honest about not altering the bmminer (aka stolen and modified cgminer  ) and he somehow patched it and got full control over frequency and voltage, I tend to think that thierry4wd is a trusted member who puts a lot of effort for the mining community.

You don't have tested my mod on your own S9 ?

I look at your Idea I looked at my idea. I came up with a different idea. I will show it next week. These new boards are better then s9 boards. Since I am an idiotic stupid moron that can't solve complex math or code very well I have to reduce myself to simple mechanical ideas and designs. Once these are made maybe the firmware is tweak able and can be improved upon but I simply don't know any thing about firmware for the new gear. I can operate it I can screen shot it.  Playing with its code is far beyond me.  I simply don't know how to do that.  In fact I don't even know how the mining code looks like. I don't know what the developer did. So I am not sure if it even uses cgminer or bminer or another firmware.

If you program the s9 1 board with brains. You can set hash down to freq 225 and volts to 7.95 or 8.00 or 8.05 this will keep you near 180-225 watts with a low fan speed. I could be wrong and it will set to freq to 200  but volts go to 7.95 at best. I was able to do two board at about 380 watts with a quality psu. I also have the three boards from another builder that fit in s9s they do a little better on efficiency but dont set lower then freq 300 so they do about 190-210 watts and higher hash. all of them are hard to go under 180 watts and fans under 2000 rpm are hard to set. also some act really weird.