8-GPU rig in 4U rack case - page 2. | Bitcointalksearch.org

x8664amd

jr. member

Activity: 129

Merit: 6

Long term HODLer since 2014

Quote from: gsrcrxsi314 on December 15, 2018, 10:46:16 PM

how much PCIe bandwidth to each slot? the full x16 lanes? or is it gimped to x1? does it run at full PCIe 3.0? or again gimped to lesser like 2.0 or 1.1?

how about the CPU specs? available to upgrade to something with more cajones?

does this actually fit in a standard 19" server rack? or is it too wide like all the other guys selling "4U server" setups? what about rails?

The number of x16 PCIe lanes available is limited by the chipset. These are not all full x16 lanes afaik.

CPU is a mobile Celeron unit, which should be plenty sufficient for mining purposes. CPU isn't the bottleneck in a mining system.

Yes, this is standard 4U rack size. This will fit in a standard 19" server rack. You can even see all the mounting points at the front.

huntingthesnark

member

Activity: 357

Merit: 26

Quote from: shater on December 14, 2018, 10:24:53 PM

Quote from: dagarair on December 14, 2018, 11:08:26 AM

Quote from: whitesites on December 14, 2018, 10:59:56 AM

If you want to maximize your GPU's life, and hash rates of your cards, build an open air rack. My 8 GPU racks have at least 2 inches of spacing between the cards. in that case the cards are going to be right next to each other meaning each card is going to be sucking in the heat from the neighboring card. The result is once the system warms up. all your cards will be hitting max Temps, and hash rates will drop as the card try to keep temps under control. With something like that you would have to use blower style cards and they don't cool as well or hash as fast as traditional cards.

If you want to be serious about this. Build open air rigs, and keep them at floor level where the cooler air is.

Boy you are totally wrong. I have over 700 machines and at first I thought like you. Testing and research tells you the exact opposite. Forcing air through at a rapid rate with enclosed units will cool the card. I have both still but only like 40-50 open air left to convert. Temp on enclosed rigs are normally 10C cooler IF THE FANS ARE GOOD.

Also on the ground is incorrect, they need to be about 2 ft above ground for optimal cooling. The reason is at ground level the rotating air (vortex) is present. At a level higher that is eliminated.

This looks nice but I hope those fans are fast. Honestly I like Octominer solution best with fans on both entry and exit.

Agreed, the enclosed casing forces air to ram through the GPU. Surprisingly, enclosed case like this got much better cooling performance than open-air rigs.

Absolutely right. It's astonishing what a set of Nidec or Delta fans in a case like this will cool, even at high ambient. Tight spacing is important in forced air rigs - your highest temps will be on the ends where there's a gap. Kinda counter-intuitive...

gsrcrxsi314

member

Activity: 367

Merit: 34

how much PCIe bandwidth to each slot? the full x16 lanes? or is it gimped to x1? does it run at full PCIe 3.0? or again gimped to lesser like 2.0 or 1.1?

how about the CPU specs? available to upgrade to something with more cajones?

does this actually fit in a standard 19" server rack? or is it too wide like all the other guys selling "4U server" setups? what about rails?

shater

newbie

Activity: 87

Merit: 0

Quote from: dagarair on December 14, 2018, 11:08:26 AM

Quote from: whitesites on December 14, 2018, 10:59:56 AM

If you want to maximize your GPU's life, and hash rates of your cards, build an open air rack. My 8 GPU racks have at least 2 inches of spacing between the cards. in that case the cards are going to be right next to each other meaning each card is going to be sucking in the heat from the neighboring card. The result is once the system warms up. all your cards will be hitting max Temps, and hash rates will drop as the card try to keep temps under control. With something like that you would have to use blower style cards and they don't cool as well or hash as fast as traditional cards.

If you want to be serious about this. Build open air rigs, and keep them at floor level where the cooler air is.

Boy you are totally wrong. I have over 700 machines and at first I thought like you. Testing and research tells you the exact opposite. Forcing air through at a rapid rate with enclosed units will cool the card. I have both still but only like 40-50 open air left to convert. Temp on enclosed rigs are normally 10C cooler IF THE FANS ARE GOOD.

Also on the ground is incorrect, they need to be about 2 ft above ground for optimal cooling. The reason is at ground level the rotating air (vortex) is present. At a level higher that is eliminated.

This looks nice but I hope those fans are fast. Honestly I like Octominer solution best with fans on both entry and exit.

Agreed, the enclosed casing forces air to ram through the GPU. Surprisingly, enclosed case like this got much better cooling performance than open-air rigs.

heatminer

newbie

Activity: 10

Merit: 0

Quote from: swogerino on December 13, 2018, 09:31:12 AM

Looks beautiful but the Psu is a bit overkill for this unless you populate it wth Gtx 1080 ti cards. In fact I think that would be the most effective cost in long term as I am sure bitcoin price will go up. Unfortunately 1080 ti is still very expensive on the market. There are cheap miners being sold on ebay and even with a cheap price no real demand is seen. I see those ads from a long time now. I have bought one from there and I am happy with it.

well it gives you the option to put 1080tis in there. as for ebay you may have been lucky. we've been buying other miner's rigs lately and have been astounded by the lack of care the hardware received.

dagarair

sr. member

Activity: 847

Merit: 383

Quote from: whitesites on December 14, 2018, 10:59:56 AM

If you want to maximize your GPU's life, and hash rates of your cards, build an open air rack. My 8 GPU racks have at least 2 inches of spacing between the cards. in that case the cards are going to be right next to each other meaning each card is going to be sucking in the heat from the neighboring card. The result is once the system warms up. all your cards will be hitting max Temps, and hash rates will drop as the card try to keep temps under control. With something like that you would have to use blower style cards and they don't cool as well or hash as fast as traditional cards.

If you want to be serious about this. Build open air rigs, and keep them at floor level where the cooler air is.

Boy you are totally wrong. I have over 700 machines and at first I thought like you. Testing and research tells you the exact opposite. Forcing air through at a rapid rate with enclosed units will cool the card. I have both still but only like 40-50 open air left to convert. Temp on enclosed rigs are normally 10C cooler IF THE FANS ARE GOOD.

Also on the ground is incorrect, they need to be about 2 ft above ground for optimal cooling. The reason is at ground level the rotating air (vortex) is present. At a level higher that is eliminated.

This looks nice but I hope those fans are fast. Honestly I like Octominer solution best with fans on both entry and exit.

whitesites

jr. member

Activity: 88

Merit: 7

If you want to maximize your GPU's life, and hash rates of your cards, build an open air rack. My 8 GPU racks have at least 2 inches of spacing between the cards. in that case the cards are going to be right next to each other meaning each card is going to be sucking in the heat from the neighboring card. The result is once the system warms up. all your cards will be hitting max Temps, and hash rates will drop as the card try to keep temps under control. With something like that you would have to use blower style cards and they don't cool as well or hash as fast as traditional cards.

If you want to be serious about this. Build open air rigs, and keep them at floor level where the cooler air is.

vincl

member

Activity: 386

Merit: 18

Quote from: shater on December 14, 2018, 12:54:06 AM

Quote from: vmozara on December 13, 2018, 03:41:49 PM

Now, the 8-slot case looks like really sweet deal.

My rigs are 7 Vega cards with homemade case, and the costs are:

Motherboard: 150$
Ram: 8gb sodimm: 40$
SSD: 128gb mini sata: $50
Power supply 1200W, breakout board and 17x power cables: 100$
Wooden and aluminum parts for case: $20

total: 360$ + time effort to make the case.
So this nice looking case is just a little bit more than my DIY solution, having much bigger PSU but a little bit less ram and ssd. I wish there was such a deal when I was building the rigs, but now it doesn't make sense for me, only if i was going to build new rigs.

I think ram can be swapped out. Though tbh, if you're mining on Linux, 4GB ram is plenty enough. You don't need anything more than that.

little bit = almost 3x the costs....

shater

newbie

Activity: 87

Merit: 0

Quote from: vmozara on December 13, 2018, 03:41:49 PM

Now, the 8-slot case looks like really sweet deal.

My rigs are 7 Vega cards with homemade case, and the costs are:

Motherboard: 150$
Ram: 8gb sodimm: 40$
SSD: 128gb mini sata: $50
Power supply 1200W, breakout board and 17x power cables: 100$
Wooden and aluminum parts for case: $20

total: 360$ + time effort to make the case.
So this nice looking case is just a little bit more than my DIY solution, having much bigger PSU but a little bit less ram and ssd. I wish there was such a deal when I was building the rigs, but now it doesn't make sense for me, only if i was going to build new rigs.

I think ram can be swapped out. Though tbh, if you're mining on Linux, 4GB ram is plenty enough. You don't need anything more than that.

vmozara

member

Activity: 190

Merit: 59

Now, the 8-slot case looks like really sweet deal.

My rigs are 7 Vega cards with homemade case, and the costs are:

Motherboard: 150$
Ram: 8gb sodimm: 40$
SSD: 128gb mini sata: $50
Power supply 1200W, breakout board and 17x power cables: 100$
Wooden and aluminum parts for case: $20

total: 360$ + time effort to make the case.
So this nice looking case is just a little bit more than my DIY solution, having much bigger PSU but a little bit less ram and ssd. I wish there was such a deal when I was building the rigs, but now it doesn't make sense for me, only if i was going to build new rigs.

swogerino

legendary

Activity: 3318

Merit: 1247

Bitcoin Casino Est. 2013

Looks beautiful but the Psu is a bit overkill for this unless you populate it wth Gtx 1080 ti cards. In fact I think that would be the most effective cost in long term as I am sure bitcoin price will go up. Unfortunately 1080 ti is still very expensive on the market. There are cheap miners being sold on ebay and even with a cheap price no real demand is seen. I see those ads from a long time now. I have bought one from there and I am happy with it.

huntingthesnark

member

Activity: 357

Merit: 26

yeah, not unlike the Octominer and Onda boards. To be fair I've found this type of layout very effective in terms of airflow, compared to more traditional 4u cases. Trouble is, you'd be crazy to buy one now. Secondhand market is stuffed with similar hardware for bargain prices...

x8664amd

jr. member

Activity: 129

Merit: 6

Long term HODLer since 2014

Pretty cool system from the guys over at bitnand.com. A riserless 8-GPU system placed inside a 4U rack server case. This systems comes with a server-grade 2500W power supply.

The whole miner is fully enclosed with front-to-back facing fans for clean airflow.

Topic: 8-GPU rig in 4U rack case - page 2. (Read 927 times)