Here is my 7 GPU server case solution 

Yes, MSI z97 gaming 5 MB and MSI Armor 470s. I found them to fit nicely in Rosewill 4U case.

Here is my new ETH rig with 5 MSI R9-390 cards (MB, CPU, RAM, DIY frame etc. were  salvaged from my previous setups). I am getting 155-157 MH or 31 MH/card on ethermine running qtminer on Win 8.1, EVGA 1600 T2, nothing special using generic batch command  as stated on the website. I did overclock the cards to 1133 MHz with afterburner, I will gradually lower the clock speed to see if I can still get the same hash rate. I am limiting card number per MB to 5 because of PSU limitations. Now setting up my 2nd MB and soon add 5 more cards to it. I will probably stop there, but I do have 2 more EVGA 1600 PSUs sitting on the shelf, who knows  

Many thanks to citronick and others who have posted their rig pictures which got me hooked.



Edit: lowered clock speed to 1100 MHz and getting about 148-150 MH, I think I will keep it at 1100 MHz.

Mine used to be on a tier system, tier 1-4 @$.15, $.21, $.25 and $.30/kWh + taxes and other fees. After 4th day I used to be on tier 4 rate. Talk about price gauging. I switched to Time of Use since Dec 2 @ $.11 (10 hrs) , $.14 (8 hrs) and $.24 (6 hrs) winter rate, $.11, $.18, $.34 summer rate. I do have 10.85 kW solar system installed about 2 months ago, I will see it's full benefit this summer. And depending on my bill I may be able to run more miners at home, didn't get monthly usage and production data from SoCal Edison yet.

I will chime in since I just installed a 7.65 kW system mostly to offset my electric bill from mining, however, it is completely a grid-tie system. I paid $.65/watt including shipping (bought from a wholesaler on eBay), $2800 for 2 inverters, installation was $1.10/watt (1 inverter would have worked if I went with SolarEdge w/optimizers). I had to take a break from mining when my Edison bill hit $900 last November for running about 8 TH. Not entirely sure if this system will help in ROI for running S7s, on the other hand, Edison buys back extra power @ $0.9/kW $0.09/kW..

That was one of the reason for going solar also, the system will generate enough power to cover my daily household usage and some excess. Hoping that it would allow me to run some gears at zero or very low electricity cost, now if Bitmain only shipped my Batch 1 S7 orders. Planning to post some pictures once I get the miners

I really didn't do the ROI math, I was thinking at least I could sell excess production at $.09/kW if mining didn't work. At current hardware price and ever increasing difficulty, it is kind of impossible to ROI even with free electricity, but everybody still wants to mine, right!

Picture of my 2 Titans. Powered by EVGA 1600 and Bitmain 1600 watt PSUs, using about 11 amp, 240V. This is what remains of my miners in my garage, S7s and Avalon are at sidehack's place. Can't afford to run them at $.34 peak hour rate (6 hours)  any longer.

I guess first 3 minis slipped through customs, today's 2 shipments of 2 minis were assessed $381.87 and $$428.59 by DHL. I am afraid of what FedEx will bill for 8 minis scheduled for delivery today.

I got 3 minis delivered today by DHL.  I was charged $42.20 for 2 but no charge for single one which was on a separate order. I am getting more by FedEx tomorrow and will know if I have to pay a duty or not. All are shipped to a residential address in Southern California.

More like 420 watts at 750 MHz using a single Bitmain APW3+++ per Mini. 

My A9s and Z9 minis are still puling in $60-$70 and $15-$20 per day per miner respectively. I am enjoying the loot indeed 

I tried but got a message need benchmarking for at least 2 algos before mining can start.

I had to stop last night during benchmarking since after 40 mins the rig was at 30/114. Rig has 10 1080 Ti EVGA SC2 and pentium G3900 with 8 GB ram. I am planning to give it a try later today. Is there a shortcut or ways to bypass benchmarking? Maybe use GPU specific known settings?

I am trying to install the miner but getting the same message in 2 different rigs.

I sent the board for repair, but Bitmain said that the board is not repairable. I am getting a replacement board for $200.

I went with A9 and Z9 route and sold my Furys and 1070 Minis, only kept 60 1080 Tis. 2 A9s and 4 Z9s replaced my hash at probably 1/4 or less electricity I was using before. All are mining to a single address. All has been mining for about 2 weeks except for 1st A9 which is mining since July 9. So far all 6 have mined 43.53619192 ZECs or 60% of total invested. I am very optimistic that these will recoup initial investment in a month or two and then mine profitably at least till the end of the year.

I decided to test the mini 1 last time before sending it to Bitmain. I tested 1 hashboard at a time and and it turned out 1 of the board was causing the PSU to trip. After opening it up, found the burned hashboard. Mini is hashing fine with 2 good boards now. 3 other Z9s and 2 A9s in the same server case are running fine.





Server Case, it is vented on top with a 1500 CFM QC-ES-1500 fan.

Anywhere from 68-79 C depending on the time of the day.

1 of my Z9 suddenly died, it was running at 750 MHz for weeks. It is now not responding after power up, no LED activity or fan spins. Tried with different working bitmain psu with no luck.