Crypto mining with multiple eGPUs - Building mining rig
 
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Crypto mining with multiple eGPUs - Building mining rig  

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cgWerks
(@cgwerks)
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Joined: 2 years ago
 
Posted by: @itsage

I left it running for 24 hours to stress test the setup. Earning average was $28.14 per day with an accepted speed of 302.1454 MH/s through Nicehash. Power consumption was 22.31 KWH through Kill A Watt meter. Energy cost in my area is $0.1146 per KWH so the setup costed $2.56 per day.

Cool, thanks for trying that! That seems a bit low with all that hardware running (maybe I'm not understanding), but still would be like ~$770/mo profit. Nice. The cool things (pun intended) if I can get my Blackmagic going, is that it should have no problem keeping cool and wouldn't impact my mini at all (if anything it would help it, as I have it sitting on top).

In theory, I'd think eGPUs would be perfect for this, as they could be hooked to separate electrical circuits if needed, and could cool themselves individually/optimally (vs. the norm of trying to build a giant case with all the hardware in it).

2018 Mac mini (i7, 16 GB RAM, 256 GB SSD) - Blackmagic eGPU (RX580)


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itsage
(@itsage)
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Joined: 5 years ago
 

@cgwerks, I've configured a few things to be as efficient as I could. In the process, I also tried most of the GPUs I have that could produce a decent return (RTX 3080, Radeon VII, RTX 2080 Ti, RX 5700, RX 6700 XT, GTX 1080 Ti, RTX 2070, RTX 2060 Super, and RX 580). Nvidia is much better than AMD cards in this regard. They run so much cooler and consistently consume less power. For example, the RTX 3080 is averaging 56˚C while Radeon VII is 80˚C. Another better example is two reference cards inside a PC case. RTX 2060 Super is at 67˚C while RX 5700 is at 82˚C.

 

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external graphics card builds
best laptops for external GPU
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2020 Gigabyte Z490 Vision D [10th,8C,K] + RTX 2080 Ti @ 32Gbps-TB3 (AORUS Gaming Box) + Win10 2004 [build link]  


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DrEGPU
(@dregpu)
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Joined: 3 years ago
 

@itsage The Radeon VII is weirdly powerful at mining ETH, which is why this "obsolete" GPU is going for over twice it's original MSRP on eBay

@cgwerks Yes, eGPU's can be hooked up to different circuits, just ensure you're doing that, as different power outlets/sockets can still be on the same circuit. TBH, as long as you're not overclocking them, You can mine on 4X 3090's (most of them; TDP has a wide range: 350W up to 500W!) on the same circuit. They do take a up a lot of power, but not so much as to trip a breaker. Again, as long as they're not overclocked. My Zotac 3090's draw about 250W when mining and never goes above 50C. 

2019 Mac Pro (RP580X) [10th,16C,W] + RTX 3090 @ 32Gbps-TB3 (Razer Core X) + Win10 20H2 [build link]  

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itsage
(@itsage)
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Joined: 5 years ago
 

@dregpu, Yes, I was very surprised it's still the best Radeon card for mining. I would say Nvidia cards overall are better/more efficient for this task.

 

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external graphics card builds
best laptops for external GPU
eGPU enclosure buyer's guide

 
2020 Gigabyte Z490 Vision D [10th,8C,K] + RTX 2080 Ti @ 32Gbps-TB3 (AORUS Gaming Box) + Win10 2004 [build link]  


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DrEGPU
(@dregpu)
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Joined: 3 years ago
 

@itsage If the price of Radeon VII's were still ~$500 USD, you wouldn't be saying that. LoL

I meant to say previously, that there's no reason eGPU's wouldn't work for mining. Mining isn't bandwidth-intensive. Those mining boards have 1 16x slot to drive a display and then 6 or more x1 PCIe slots for the mining GPU's. TB3 has 4 times as much bandwidth! I actually randomly received a Zotac B150 mining motherboard for free when I bought a refurb RTX 2080Ti a couple of years ago. Maybe I should sell my Razer Core X and fire that old mobo up! 

2019 Mac Pro (RP580X) [10th,16C,W] + RTX 3090 @ 32Gbps-TB3 (Razer Core X) + Win10 20H2 [build link]  

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itsage
(@itsage)
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Joined: 5 years ago
 

@dregpu, If all cards were at MSRP, RTX 3070/3080 would be my pick. Your RTX 3090 is great at mining too so give it a try on the Zotac mining board. Use Hive OS instead of Windows if you're running more than 3 cards.

 

LinkedIn | Twitter | Facebook | Youtube | Instagram
 
external graphics card builds
best laptops for external GPU
eGPU enclosure buyer's guide

 
2020 Gigabyte Z490 Vision D [10th,8C,K] + RTX 2080 Ti @ 32Gbps-TB3 (AORUS Gaming Box) + Win10 2004 [build link]  


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DrEGPU
(@dregpu)
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Joined: 3 years ago
 

@itsage I'd have to buy CPU, RAM, and the risers for it, none of which would be particularly expensive but add it all together and it isn't worth it to me. I might give it away on Craigslist or something since it's just taking up space. 

2019 Mac Pro (RP580X) [10th,16C,W] + RTX 3090 @ 32Gbps-TB3 (Razer Core X) + Win10 20H2 [build link]  

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itsage
(@itsage)
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@dregpu, I also put together another desktop for mining in the past week. This one has on dGPU through a riser extension cable. The fun thing I observed is the Thunderbolt 3 eGPU connection is more reliable than the PCIe riser connection. Almost once a day, one of the three dGPUs would disappear. The eGPU always stays active. I went into the BIOS and made a couple setting changes to make it more reliable. One was Link Negotiation to Gen 1, and then enabled Above 4GB Decoding to handle four cards.

This PC has the Gigabyte Vision D Z490 + i7-10700K. The PCIe riser was actually a vertical GPU mounting kit for this Lian-Li case. I simply took it out to mount the RTX 2070 ITX from the AORUS Gaming Box. PCIe extension cable hooked up to the bottom PCIe slot. The other two slots were occupied by ASUS GTX 1080 Ti and RTX 2060 Super FE. Another win for RTX 2080 Ti eGPU is that it's the coolest operating card as well as the most efficient.

LinkedIn | Twitter | Facebook | Youtube | Instagram
 
external graphics card builds
best laptops for external GPU
eGPU enclosure buyer's guide

 
2020 Gigabyte Z490 Vision D [10th,8C,K] + RTX 2080 Ti @ 32Gbps-TB3 (AORUS Gaming Box) + Win10 2004 [build link]  


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DrEGPU
(@dregpu)
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Joined: 3 years ago
 

@itsage Nice setup. My waterblocked Zotac 3090 ram surprisingly cool while mining using NiceHash. GPU never went above 50C and the memory junction never went above 80C! That’s with a passive backplate. 

I also forgot that I’d need another power supply to power the mining board. 

2019 Mac Pro (RP580X) [10th,16C,W] + RTX 3090 @ 32Gbps-TB3 (Razer Core X) + Win10 20H2 [build link]  

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cgWerks
(@cgwerks)
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Joined: 2 years ago
 

@itsage @dregpu I don't have the money right now, but I think some of the gaming PCs one can still get with the 2060 Super might be the most cost effective way to get mining quickly right now. What I need, of course, is a Mac Pro with quad Pro Vega II. Smile

I'm still hoping to get my RX580 going one of these days (haven't been able to try any of the new advice for the last week or so... maybe in another week). But, it would be interesting to chain them up to keep adding power, since bandwidth isn't so much of an issue.

2018 Mac mini (i7, 16 GB RAM, 256 GB SSD) - Blackmagic eGPU (RX580)


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