1000w SuperNOVA EVGA G2 Mining Rig Power

[djkice]

Power supply experts... help!!!


I have two of these at the moment

System 1
Vega 56 x3
Using 625w at the walll

System 2
Vega 56 x3
Using 625w at the walll

I have a two spare 1070 which I want to add to each system and they use about 100w. Power wise I think it should be okay but connector wise I'm short.

I've used all the VGA. I have the CPU2 and quite a few Sata available. Which would be the safest to get to 8pin converter for or would you advise against doing this and get another power supply power supply per system?

I do plan to add another power supply per system and a few more vegas but that will be in a few months to come.

Thanks!~

[P00P135]

Just buy 6 or 8pin Y splitters that split into 6+2 pins.  You can safely split a PCIe cable to power two risers or both plugs on one Vega.  I'm assuming you are using two pcie cables per Vega which you don't need to do.

[bathrobehero]

Only use splitters if you know exactly what you're doing.

[greyday]

Only use splitters if you know exactly what you're doing.

What he/she said. Are you using the 6+2 pins for the risers? Use SATA converters for those, you can even double them up if needed, but don't skimp on the cards themselves. Or pick up a cheap 400W psu for those two cards, they're not very expensive.

Also: the 1070 will draw more than 100W, up to 150W actually. You can keep it low by underclocking or mining a cryptonight coin.

[djkice]

molex / sata for raisers

when i was using both psu for one rig at wall power with 4x vega and 1070 was 850w.

I guess that was close to comfort so I bought antec psu today

[parkers]

I recommend you to add one more 1000w or 1200 power supply.
Don't squeeze all the juice from our PSU its bad thing to do.

Power consumption calculation for 2 Nvidia cards:
2x Gtx 1070 150w 12.5A * 2 = 300W  25A

Power consumption calculation for 2 Ati cards:  
2x Vega Power limit 23% 250w 20.8A * 2 =  500W 40.16A
 
sum: 300w 25A + 500w 40.16A = 800w  65.16A
 
You can downvolt the cards more but it depends on your skill set.

[grrrgrrr]

Best practice is mining at 50%~60% max PSU power. That gives you the best power efficiency. PSUs have 10 year warranty. They don't depreciate.

[huntingthesnark]

Yeah, never stint on PSUs.

Also it pays to be suspicious of power requirements - I must have spent days trying to get one rig to boot with 6 cards. Couldn't do it, but should have been fine by the numbers (which I believed), so kept on trying.

Then added another spare £50 psu just as a test, and boom, no trouble at all.

[greyday]

Best practice is mining at 50%~60% max PSU power. That gives you the best power efficiency. PSUs have 10 year warranty. They don't depreciate.

Or buy 80+ gold or titanium so you don't have to worry about them as much, they're designed to run constant at at least 80%. I have a gold 1050W that runs at around 850W constantly and barely even runs warm.

[djkice]

yeah my vegas are undervolted and use about 175w each. all my psus are gold or platinum.

I just added a  antec EDG750 - running one vega and 1070 off it. two psus combined is 900w.

Thanks guys