Purpose Built rig? - Page 4

airsquirrels · 2017-05-30, 00:50

SuperMicro 4027GR. I actually got that particular barebones 'damaged' on eBay for $2000, retail $3300. At minimum you need two sticks of ECC DDR3 and a pair of 2600v2 Xeons.

Other options include http://www.asrockrack.com/general/pr...odel=3U8G-C612, but if you don't care about aesthetics this is an entire turn-key 8 GPU 4U rack mount system from the mining folks:

https://www.bitworks.io/product/fuel...-8-gpu-server/

The 8 Titans managed about 700GhzDay/Day.

kladner · 2017-05-30, 01:04

I really appreciate the information. No way I can go for even the entry level boxes. I am doing well to be running a 6700K and two GTX x60s (4.. & 10..). I still get hardware lust, though.

GP2 · 2017-05-30, 02:29

Quote:

Originally Posted by airsquirrels

I do indeed have multiple systems with density between 3 and 10 GPUs per host. Of course the 10 GPU system has significant 11000RPM fans blowing through the horizontal cooling v fins allowing the GPUs to be side by side without needing as much airflow. The 8GPU systems are liquid cooled via an external loop, so that is not a good comparison.

A better example is the system I built over the weekend. $250 Kaby Lake 51W CPU host with 1x PCIe risers and 7 GPUs spread out with ~ 2 slot spacing separate from the motherboard. The cards (RX580s) are around 65* at load with no additional fans in a 72* room. This of course does not work as well for GPU loads that need lots of PCIe bandwidth, however neither LL or TF requires this.

Interesting.

So do you stand by your estimate of incremental $/exponent as low as $1.14 being achievable with this kind of setup (assuming 74M exponents with 4M FFT and $0.10 / kW-h, as per your earlier post)? How much power would the 11000 RPM fans or liquid cooling system draw, and how much would they add to the hardware cost?

LaurV · 2017-05-31, 03:24

Yes, one can run 4 of them "in the box" in a normal case, if good cooling. For example, all 4 will run at 16x, or you can even run 7 of them with extenders, with one running at 16x and the other 6 running at 8x, with a mobo I use. The tt case came with PCIE risers too (for mounting the cards at 90 degrees) - but I would not recommend that case to anybody - seriously! very bad stuff! maybe I will put some posts about my struggle with it. In fact, I wanted to start a blog here some time ago, but I don't like the orange name... (no joke!).

Opposite to some other cards which need lateral intake or will exhaust the hot air inside of the case, and you can not squeeze 4 of them together (like for example the infamous gtx590, and some brands of titan-Z) or they are too big (like the air cooled Asus cards that take 2.5 or even 2.8 slots, they are sooooo big!), the normal titans (even when air cooled) are below two slots tick, and do not exhaust air into the case.

Mark Rose · 2017-06-01, 04:16

ASRock is releasing a 13 PCIe slot motherboard for mining:

Apparently it also has an m.2 slot, so maybe a 14th card with the right riser could be used.

2017-05-31, 03:24	#37
LaurV Romulan Interpreter "name field" Jun 2011 Thailand 41×251 Posts	Yes, one can run 4 of them "in the box" in a normal case, if good cooling. For example, all 4 will run at 16x, or you can even run 7 of them with extenders, with one running at 16x and the other 6 running at 8x, with a mobo I use. The tt case came with PCIE risers too (for mounting the cards at 90 degrees) - but I would not recommend that case to anybody - seriously! very bad stuff! maybe I will put some posts about my struggle with it. In fact, I wanted to start a blog here some time ago, but I don't like the orange name... (no joke!). Opposite to some other cards which need lateral intake or will exhaust the hot air inside of the case, and you can not squeeze 4 of them together (like for example the infamous gtx590, and some brands of titan-Z) or they are too big (like the air cooled Asus cards that take 2.5 or even 2.8 slots, they are sooooo big!), the normal titans (even when air cooled) are below two slots tick, and do not exhaust air into the case. Last fiddled with by LaurV on 2017-05-31 at 03:34

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2017-05-30, 00:50	#34
airsquirrels "David" Jul 2015 Ohio 11×47 Posts	SuperMicro 4027GR. I actually got that particular barebones 'damaged' on eBay for $2000, retail $3300. At minimum you need two sticks of ECC DDR3 and a pair of 2600v2 Xeons. Other options include http://www.asrockrack.com/general/pr...odel=3U8G-C612, but if you don't care about aesthetics this is an entire turn-key 8 GPU 4U rack mount system from the mining folks: https://www.bitworks.io/product/fuel...-8-gpu-server/ The 8 Titans managed about 700GhzDay/Day.

2017-05-30, 01:04	#35
kladner "Kieren" Jul 2011 In My Own Galaxy! 10011110101110₂ Posts	I really appreciate the information. No way I can go for even the entry level boxes. I am doing well to be running a 6700K and two GTX x60s (4.. & 10..). I still get hardware lust, though.

2017-06-01, 04:16	#38
Mark Rose "/X\(‘-‘)/X\" Jan 2013 https://pedan.tech/ 2⁴·199 Posts	ASRock is releasing a 13 PCIe slot motherboard for mining: Apparently it also has an m.2 slot, so maybe a 14th card with the right riser could be used.