If you mean what rigs am I using, I have this at the moment [Please ignore the mess; will be cleaner when moved to the next closet]:




Here is the closet I'm presently working on.  I have an exhaust fan on the way for this closet.  It should be here Wednesday or Thursday.  I also have fifteen (15) SP20's on the way.  They should be here Thursday.  I also need to finish the power going to this closet as well.  I'm presently doing taxes.  I will finish taxes first; then get this closet finished and mining sometime next week.

A window is centered in the back inside this closet where a 7,800 CFM exhaust fan will be installed.  This structure is large enough for 96 S4's or 192 S5's.  However, I'm not sure what all I'm putting in it at this point in time.  I have plans for moving to another State with cheaper power than where I am presently.  I may wait to purchase more rigs when I move to that other State rather than spending money on upgrading power at my house here in Alabama.

I purchased more PDU's as well but I got horizontal versions this time to save some money.  I will be making whips in the future when I move to another State.

Everything I ordered arrived in the U.S. from France in good shape.  Breakout boards were bubble wrapped and protected very well.  The quality of the cords look great!  Thanks again for your hard work, Sir!  I hope to be ordering quite a bit more from you in the future!

They are on the way, Sir.  Hence, my estimate on costs for this 12U/16kW rig "with" new chips.

It would more than likely be around $12,600.00 to $14,200.00 if it were a 30 TH/s rig with built in PSU's.

I was thinking 30 TH/s range with 16,000 watts and .51 watts per GH

Without knowing the hash rate for this 16,000 watt rig?  I'm supposing it would be about 30 TH/s

The reason it's loud is you need a fan to go up to just shy of 5,000 RPM's to keep it cool at default clock speeds in warm temperatures during the summer.  If you under clock it, it will make it quieter because of less heat to contend with, which means less fan speed.  Unless you have it working in warm climate.  If you have several of them, you are better off putting them inside of something while keeping them cool to keep the noise down.  Don't forget to get the heat out of the closure.  That's the most important thing!

Don't try to run this rig at default clock speed of 2000 GH/s with fans that are lower RPM.  Otherwise, it will run hot quite easily and possibly shut off periodically for reaching the 80 C threshold temperature depending on the ambient temperature they are sitting in.  

That is my opinion.  This rig just runs much hotter than the S3's.

So, basically, the only way to have these quieter is to run them at lower clock speeds in a room that does not have to high of an ambient temperature.

I had to get replacement fans for an S4.  Two of them failed on me.  The propellor with axel came out of it's socket on both of them [exposing the copper coils].

I decided to order some fans to have ready to replace failed fans in the future to avoid too much down time.  I also bought extension cables, as the cables that come with the fans are not up to 27 inches long [Needed for the furtherest fan in the back left of the unit].  I purchased three (3) Delta Electronics PFC1212DE 120x120x38mm Cooling Fan, 252.85 CFM, 5500 RPM, 66.5 dBA, 4.8 Amp, PWM Connector.  This fan comes fabricated from the manufacturer with a 4 pin connector.  Here is a picture of the fan:




The following is a video review of the fan to also show watts consumed at full speed:  approximately 51.2 watts at full speed (5500 RPM & 252.85 CFM).


https://www.youtube.com/watch?v=mXdAUuD-kC4

Sounds Great!!!

Thanks again for the hard work; with little sleep at that.  It's really appreciated!!!

Best Regards!!!

Thanks for the review.  I ordered 60 15AWG PCI-e cords and breakout boards myself.  I look forward to seeing and using his products.

Thanks again for the review!

Thank you for sharing that, Xircom.   Thank you very much!!!

Can someone tell me about how many GH/s we would get from the SP20 if it was under clocked close to .51 watts per GH/s?

EDIT:  I found a good answer which ended up being .55 watts per GH/s for 1,350 GH/s.  That's pretty damn good!!!

Hello Sir,

I need to order 3 of your breakout boards for the IBM 2880, please.  I also want to order forty-eight (48) of your home made 15AWG 1.65mm 32" cords.

I plan to order many more IBM 2880 breakout boards later.  This is a start.  Your business would be appreciated greatly!!!

Do you just send me an invoice?  What is the method of payment?  Please let me know how to initiate an order with you.

Very nice setup, McHouston.

I just purchased 3 of these IBM 2880 watt PSU's myself.  I'm about to order 3 of these breakout boards and 15 AWG cords.

May I ask how many S3's you have hooked up to each 2880 watt PSU?

Also, if you purchased PCI-e cords as well, what length cords did you get?

Forgive my "newbieness," please...

Can I hook up my S3's to this PSU with your boards until I get S5's?  My guess is that it would be okay even though it would be 648 watts available to each S3 via two PCI-e connections; the s3 would only use what I have configured it to use [if I over clocked it]... correct?

EDIT:  Apparently I can use this 2880 watt IBM PSU with my S3's.  I like the way McHouston has his set up:

Yes, it was a rear fan.  It is still under warranty.  All of my S4's were shipped December 1, 2014.  I contacted Yoshi and BitmainWarranty.  I remember in the future to only contact one of them... BitmainWarranty.

Thanks again for the info!!!

WOW...  Okay... I'm glad!!!

Thanks again, Sepulcher!  

Thumbs Up!!!

I sent yoshi an email.  I'm about to send bitmainwarranty a PM shortly.  Here are some pictures.  [I dusted the thing out before putting it back to mining.  The temps are okay still; but higher than the other S4's].

I blew out the dust before putting the lid on the last time.

The fan on the right is the one that pops out of it's socket.  The axel is still connected to the propeller though.  It will not snap in.  I've taken the lid off 3 times now trying to get it going.  It just won't do anything.

I'm curious...  Does a screw hold on the axel from the other side of the fan.  I did not take the outside grille off of the S4 to investigate that.  Probably should have.

The "search" is disabled right now.  Otherwise, I'm sure I could find the answer to this question:

One of my fan blades on the back of an S4 popped out of its socket.  The metal axel is still connected to the fan blade(s) [propeller; whatever you want to call it].  The fan's axel simply came out on it's own from the housing and rested against one of the blades (circuit boards).  I took off the lid to see it like this.  I put the axel back in the hole in the center of the housing and pressed but it seem to not want to stay in there.  Will it click if I press harder?  I don't want to break the thing.

Will I need to buy another fan?  If so, what fan do I get?  Since I bought my S4's the end of November, is it still under warranty to get a replacement fan from BITMAIN?

Another excellent point to make and it's doing so while having more power efficiency than the SP20.