1. How can you calculate how many rigs you can plug on that ?

- It's all about power consumption. You should ask about how many Current (Ampere) in your new warehouse power line. Then check back the power consumption for your rigs, so here you go. One of my friend has a mini farm with 360V power supply, and total current he could access is 60-A, so total power is 21.6 kW. All of his GPUs are P106-100, each rig has 12 GPUs which consumes about 1250W as mining ETH. So 21.6/1.25 ~ 17 rigs maximum.

2. How can I calculate what's the price of my Kw/H ?

- The letter from electricity company is quite a lot, I think you should ask them make a table which you could easily track. But as I understand, they make calculation based on several stages according to power consumption: 15,090 kWh and 50 kilowatts, I'm not quite sure but it seems expensive.

You should higher an electrician before you get yourself killed.

Rate G
General rate for small-power customers
Back to base rates

Customers eligible for Rate G
Rate G applies to contracts with no billing demand or with a minimum billing demand of less than 65 kilowatts (kW).

In general, Rate G is advantageous for customers whose power demand does not exceed 50 kW. Approximately 90% of Hydro-Québec business customers are signed up for Rate G.

These explanations have been simplified. For more details about Rate G, consult section 1 of chapter 3 of the Electricity Rates, approved by the Régie de l’énergie.

Structure of Rate G
Billing for Rate G includes the following:

A fixed charge, i.e., an amount you pay for each period in question, even if you consume little or no energy. It is established on a monthly basis, but the amount billed varies slightly from one consumption period to the next based on the number of days in the period.
An amount for the energy in kilowatthours (kWh) consumed during the period in question. Two different prices apply depending on the amount of energy consumed:
a price for the first 15,090 kWh
a lower price for the remaining consumption
An amount for the power in kilowatts (kW) measured during the period in question, if the power demand exceeds 50 kilowatts (kW).
Rate G is a monthly rate, which means the fixed charge, the first-tier consumption limit and the amount billed for power are based on a 30-day period.

In general, the consumption period is about 1 month if there is a charge for billing demand, or about 2 months if there is no charge.

Learn more about your electricity rate

Rate G prices in effect
Fixed charge for a 30-day period, adjusted to the exact number of days in the consumption period in question $12.33
Price of energy
First 15,090 kilowatthours (kWh) 9.78¢/kWh
Remaining consumption 6.88¢/kWh
Price of power
First 50 kilowatts (kW) not billed
Power exceeding 50 kW $17.43/kW
Rates in effect as of April 1, 2017. This table does not replace the Electricity Rates document in any way whatsoever.

How to read your Rate G electricity bill

Switch to another rate
Automatic switch
Hydro-Québec will automatically switch you to Rate M or Rate G-9 if your total consumption is 100,000 kilowatthours (kWh) or more and if, given the rates in effect on April 1 of each year, applying the more advantageous of these rates would yield savings of at least 3% on your electricity bill in comparison to Rate G.

When your minimum billing demand reaches 65 kilowatts (kW), your contract is no longer eligible for Rate G. It automatically switches to Rate M or, if your load factor is less than 30%, to Rate G-9.

Request a switch
If you’ve been billed for power (power demand of 50 kW or more) at least once over the past 12 monthly periods, Rate M may be more advantageous for you.

If the load factor on your bill is usually below 30%, and your power demand is above 65 kW (a billing demand of 15 kW shows up in your consumption history) at least once during the past 12 monthly periods, Rate G-9 may be more advantageous for you.

If you think one of the situations above may apply to you, contact our Business customer services at 1 800 463-9900.

Planning any changes?
If you’re planning to buy new equipment, extend your business hours or enlarge or renovate your facility, your use of electricity could increase and it could then be to your advantage to switch to Rate M or G-9. Don’t hesitate to contact our Business customer services at 1 800 463-9900 for more information.

Other rates or rate options
If you have your own electricity-generating equipment and have a Rate G contract, the following option may be of interest to you.

It's a motherboard/processor issue, I got around this by using a port multiplier on one of the x1 slots.
I would try messing around with BIOS first like disabling junk like onboard audio and change pci configurations.

If you're certain all individual cards and risers are working, try adding them one-by-one, starting with one connected to the physical PCIe x16 slot closest to the CPU (use this one for video, as well).
Assuming your BIOS is currently at default settings, ensure that you have enabled 4G decoding, and have PCIe link speed to GEN1 or AUTO.

Clear CMOS (either use the appropriate jumper, or remove the battery and replace it after ~10 seconds).

Then attempt to boot with ONE card, directly installed into the physical PCIe x16 slot closest to the CPU. Can you get your system to boot with this configuration?

Did you checked everything in the BIOS ?

Sometimes Windows 10 does some funny things (with UEFI it can change settings in the bios), and it messed my setups before !

Hi

Is it working with 4 ?

If so, try to connect your screen to the GPU that is on the first PCIE x16 port, not on x1, and especially not on the onboard graphics output.
It helps for windows to boot

STOP blindly applying BIOS's and overclocks!

That error is typically due to too high overclocks.

Flash BIOS, but keep clock speeds stock, test for 15minutes, if its stable then start upping the clocks 50Mhz at the time mem, each with a 15 minute testing period.

I have 8 rigs with 12xArmor 4G RX570, no issues at all, I do polarisbioseditor with the oneclick patch, then start dialing in clocks for each card individually (Testing 1 card until its stable, then applying to the next one, testing again before applying to the next one etc.