# Multiple 6 GPU Setup and load calculations help

Discussion in 'Crypto Currency & Mining' started by meredec, 17 Jan 2018.

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1. meredec

# Posts: 2

Hi

This is my first rig and I have done quite a bit of research.

I intend to build a 6 GPU rig using RX570s and another using 1070s. And if I can perhaps a third one..

This is the wiring plan

The PSUs are EVGA 1300W (slave) and EVGA 1600W (main) fully modular platinum rated.

Risers are 6 pin or MOLEX powered (no chain, only single molex)

Wattage estimate for MOBO+CPU etc = 200W
Wattage estimate per card/riser combo = 250W/ea

Total Wattage at wall estimate per rig inc. 10% contingency = [200 + 6(250)] = 1870W
Single socket MAX = 13A*230V = 2990W

This means 1 rig per each socket max load would be <65%

Now my questions:

Assuming the ring system in the house is 32A so max W are 32A*230V = 7360W

Am I safe plugging 3x 6GPU rigs for a MAX total of 5700W so a load of about 80%?

Should I get smaller PSUs?
Any recommendation?

I am a newbie so please be kind

2. 200sols

# Location: Hampshire

My 1070tis only pull 130w each, a single 1200w PSU should easily power that rig. Use 8pin PCiE splitters and power the card + riser together from the same cable.

3. Karateyid

# Posts: 2,583

Just a standard y splitter?? 6pin to 6+2 pin x2?

4. 200sols

# Location: Hampshire

8pin to 6+2 pin x 2.

5. Karateyid

# Posts: 2,583

Ah ok. Cheers will grab some for my rig as wanted to power card n riser from same pci if posdible

6. mattyg

# Posts: 7,751

8x 580's pulling 830w odd at the wall

7. meredec

# Posts: 2

Thanks peeps

Will of course run the numbers with the Watt meter

But in theory, for the circuit in the home, it is safe to load overall at 80% max?

8. 200sols

# Location: Hampshire

Yes, I assume it is RCD protected. But be wary of anything else on the circuit that uses a lot of power. If your house has two rings, just split between them.