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Title: How would you power 12 Vegas on one rig? Need suggestions. Post by: tf2addict on November 16, 2017, 11:30:47 PM Trying to design a 12 Vega 56 rig based on a H110 PRO BTC+ motherboard (I realize that this may not even be feasible from an operating system/driver support view yet but I am confident it eventually will be). Given that the Vegas require 2 8 pin power cables plus you need to power the riser it's kind of tricky to figure out the best way to power all this.
I am thinking maybe a 750W ATX PSU to power the MB and two of the 12 Vegas. That leaves 10 to be powered from a 2400W HP server PSU (which should be enough wattage) using a breakout board with 24 8 pin cables. 20 of the 24 cables would go to the Vegas which would leave 4 to power 10 risers. I would use splitters to get enough connections for the risers or I could power some of them off the ATX PSU. Is there a simpler/better way to do this? I could also use two ATX PSUs but that is a lot more money, especially to achieve the same efficiency that the HP could achieve. Plus I don't think ATXs would have anywhere near the number of available power cables. Another option to simplify things is limit the rig to 6 or 8 Vegas and fill in the rest with RXs I have, though at this point I don't plan on buying any more RXs unless they drop to well below $200. Title: Re: How would you power 12 Vegas on one rig? Need suggestions. Post by: bmartin44 on November 17, 2017, 12:42:45 AM Trying to design a 12 Vega 56 rig based on a H110 PRO BTC+ motherboard (I realize that this may not even be feasible from an operating system/driver support view yet but I am confident it eventually will be). Given that the Vegas require 2 8 pin power cables plus you need to power the riser it's kind of tricky to figure out the best way to power all this. I am thinking maybe a 750W ATX PSU to power the MB and two of the 12 Vegas. That leaves 10 to be powered from a 2400W HP server PSU (which should be enough wattage) using a breakout board with 24 8 pin cables. 20 of the 24 cables would go to the Vegas which would leave 4 to power 10 risers. I would use splitters to get enough connections for the risers or I could power some of them off the ATX PSU. Is there a simpler/better way to do this? I could also use two ATX PSUs but that is a lot more money, especially to achieve the same efficiency that the HP could achieve. Plus I don't think ATXs would have anywhere near the number of available power cables. Another option to simplify things is limit the rig to 6 or 8 Vegas and fill in the rest with RXs I have, though at this point I don't plan on buying any more RXs unless they drop to well below $200. I don't know price of HP server PSU + a breakout board, but if you think that it is cheaper than two ATX PSU, then it is good to go. No point to limit GPU on your rig with lower spec of AMD GPU. Title: Re: How would you power 12 Vegas on one rig? Need suggestions. Post by: tf2addict on November 17, 2017, 01:39:42 AM HP server PSUs are ridiculously inexpensive and they're higher efficiency than ATXs. I guess the downside will be noise but that's pretty much irrelevant anyway with Vegas.
I'm going to do six Vegas as a starting point then evaluate. Title: Re: How would you power 12 Vegas on one rig? Need suggestions. Post by: ben8jam on November 17, 2017, 01:57:01 AM HP server PSUs are ridiculously inexpensive and they're higher efficiency than ATXs. I guess the downside will be noise but that's pretty much irrelevant anyway with Vegas. I'm going to do six Vegas, then go to eight, then step back and evaluate. I've been seeing a lot about these PSUs with breakout boards- can you share one from ebay so I can get an idea of what they are exactly? Title: Re: How would you power 12 Vegas on one rig? Need suggestions. Post by: jmigdlc99 on November 17, 2017, 02:04:26 AM I haven't been able to read the full technical explanation on why, but I believe you may encounter problems running 4x VEGAs on one rig (because of something to do with HBM2) much more on a 12x VEGA rig. That being said, I also am curious to find out if and how some people have managed to run at least 6x VEGAs on a single motherboard. Hope the people from the vega thread (already 80+ pages long) can come and enlighten us here.
Title: Re: How would you power 12 Vegas on one rig? Need suggestions. Post by: BeerMan81 on November 17, 2017, 05:38:12 AM IMHO, I would highly suggest you start small, get your feet wet. 12 GPUs on one rig was what i EVOLVED to, but I would not suggest that as a start. What happens if your rig freezes? You aren't making money.
Get 2x 6GPU rigs, MUCH easier to manage. Even though you will have a few extra parts, I think it will be worth it in the end. PSUs get an ATX PSU platinum 750w PSU and use it to run all your risers, mobo, cpu on it. Get a server PSU (or more) https://www.deepinthemines.com/collections/power-supplies/products/94-platinum-1200-watt-power-supply-for-gpu-open-rig-mining-ethereum-zec-zcash https://www.parallelminer.com/product-category/power-supply-kit/ Buy your Vegas, but test with 1-2 at a time and gauge how much power they draw while overclocking etc (this is an art in itself). You will need a wattmeter. This is nice, because you will be able to tell how many GPUs that each PSU can handle. Consider that you dont want it running full load, it should have some head room. |