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4x titan rtx deep learning, GPUs cluster

jackp
By jackp
in New Builds and Planning
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Posted (edited)

Hello, 

 

My team is trying to build a GPU cluster running Horovod cluster by building 4 of these computers to start (so about 16 titan rtx in total) for training deep learning. This is the spec that we are planning to build the cluster on. 

 

Motherboard: Asus ws c621 sage

CPU: 2 x  Xeon silver 4214

GPUs: 4 x Titan RTX ( two NVLink bridge)

Ram: 256 ECC GB

SSD: 970 EVO Plus 1 TB

network card: mellanox connect x4 (InfiniBand 100Gbps )

NAS: 8 x 8GB Seagate ironwood HDD (RAID6)

Power supply: Corsair AXi1600i Titanium, Silverston SX800-LPT

Case: Obsidian 1000D Super-Tower

Cooling:

2 x Ek-Annihilator

4 x Ek Vector RTX Titan

 2 x XRES 140

 

Location: Thailand

 

 

Our aim is to maximize the batch size of our model which means that the combined VRAM would have to be has high as possible. We have looked into Tesla V100s and really want them but they are over our budget. My understanding is that the advantage of Tesla is higher VRAM (32GB) and ROCE (RDMA over coverage internet). My question is:

 

1. Does anyone know if c621 sage support NVLink ?

2. Do you have anything part that you would replace if you were to build this? Our budget is about $100,000 including the InfiniBand switch.

3. Do you think the Mellanox card is necessary as Titan RTX does not support RDMA ? ( I don't won't networking to be a bottleneck but InfiniBand switch are ridiculously expensive) 
4. Does anyone have any experience using InfiniBand with a normal 10G network switch. How does it work ? We have about 10 workstation with 2 GPU each that only has 10G network card and want to chain them to this network.

5. Is there a motherboard (server grade is okay) that support NVSwitch or a better way to connect these 4 computer up ? 

 

Thank you so much!

 

Jack P.

Edited by jackp
want to state reason and location. Sorry! First time posting
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Posted
14 minutes ago, jackp said:

We have looked into Tesla V100s and really want them but they are over our budget

then why are you using Xeons?

15 minutes ago, jackp said:

Case: Obsidian 1000D Super-Tower

why are you using towers and not serverracks?

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Posted

Why not just get a DGX1? It's expensive but has everything figured out for you in a small compact box

▓ƆԀ▓ S▓₱▓Ɇ▓c▓s▓: i7 6ʇɥפᴉƎ00K (4.4ghz), Asus DeLuxe X99A II, GT҉X҉1҉0҉8҉0 Zotac Amp ExTrꍟꎭe),Si6F4Gb D???????r PlatinUm, EVGA G2 Sǝʌǝᘉ5ᙣᙍᖇᓎᙎᗅᖶt, Phanteks Enthoo Primo, 3TB WD Black, 500gb 850 Evo, H100iGeeTeeX, Windows 10, K70 R̸̢̡̭͍͕̱̭̟̩̀̀̃́̃͒̈́̈́͑̑́̆͘͜ͅG̶̦̬͊́B̸͈̝̖͗̈́, G502, HyperX Cloud 2s, Asus MX34. פN∩SW∀S 960 EVO

Just keeping this here as a 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15 minutes ago, GoldenLag said:

then why are you using Xeons?

 

I guess it's for 24/7 operation cause we want to utilize this as much as possible. 

 

15 minutes ago, GoldenLag said:

why are you using towers and not serverracks?

That could be an option. Do you have a serve rack motherboard to recommend ?One reason I didn't look into this cause I don't have experience with serverrack. Another reason is server fan noise and we don't want to put this in datacenter as our datacenter doesn't allow us connect to internet. We plan to place it in our room.

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15 minutes ago, BuckGup said:

Why not just get a DGX1? It's expensive but has everything figured out for you in a small compact box

So 3 main reasons.

 

1. It only offers 256 GB of GPU memory (Something I really want to maximize)

2. Its 1.5 times the price of the cluster (with 384 GB of GPU memory) and I can't find a Nvidia distributor in Thailand

3. We only requires all the GPU memory occasionally when we run our final model which is what DGX-1 excels at. In 95% of the time, our data scientist can use one or two GPUs at a time to prototype and run smaller models. So 16 GPU would allow us more flexibility than a DGX-1

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1 minute ago, jackp said:

I guess it's for 24/7 operation cause we want to utilize this as much as possible. 

you can use cheaper Epycs............. and stability really isnt a reason to use Xeons or server/HEDT hardware. 

9 minutes ago, jackp said:

That could be an option. Do you have a serve rack motherboard to recommend ?One reason I didn't look into this cause I don't have experience with serverrack. Another reason is server fan noise and we don't want to we don't want to put this in datacenter as our datacenter doesn't allow us connect to internet.

https://www.newegg.com/p/pl?d=GIGABYTE+MZ31-AR0&N=50001314

 

something along the lines of this since you can do server mounts. tho i dont entirely see how you are gonna fit 4 GPUs + infiniband without PCIe extenders. 

 

but this has plenty of expansion and you only need to buy 1 bottom of the barrel EPYC CPU. 

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8 minutes ago, GoldenLag said:

you can use cheaper Epycs............. and stability really isnt a reason to use Xeons or server/HEDT hardware. 

Thanks for the recommendation! Just curious though, what are the reason to choose Xeons over Epycs or vice versa? We need to do a lot of preprocessing (like FFT transformation or augmentation). Would 2 Xeons (with combined 24 cores) or EPYC with 24 cores do better ?

 

12 minutes ago, GoldenLag said:

https://www.newegg.com/p/pl?d=GIGABYTE+MZ31-AR0&N=50001314

 

something along the lines of this since you can do server mounts. tho i dont entirely see how you are gonna fit 4 GPUs + infiniband without PCIe extenders. 

 

but this has plenty of expansion and you only need to buy 1 bottom of the barrel EPYC CPU. 

 I'll definitely look into this

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1 minute ago, jackp said:

Would 2 Xeons (with combined 24 cores) or EPYC with 24 cores do better ?

depends on the workload. tho you can say a Xeon Core is a bit better than a Epyc core. tho there is allways the 32 core option. 

1 minute ago, jackp said:

Just curious though, what are the reason to choose Xeons over Epycs or vice versa?

well in your case its due to it being cheaper since you just need to buy a single CPU. youve then got 8 dimms to fill with memmory. 

 

each Epyc CPU has 128 lanes. the second gen Epycs have the same in PCIe 4.0, but go up to 160 in dualsockets. 

 

you seem to want to squeeze a lot of performance into the budget. singlesocket 1st gen Epyc should do the trick. 

 

 

https://www.newegg.com/p/N82E16819113592?Description=epyc&cm_re=epyc-_-19-113-592-_-Product

found second gen for not that much actually, and that will offer better per core performance. especially since you dont need to deal with 2 nodes. (dont know how BIOS will be dealt with, so contact the board vendor regarding that, at worst you can just grab 1st gen)

 

also, threadripper coolers will fit. TR4 and SP3 is the same socket (not intercompatible with CPUs). 

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