Before the Summit and Sierra supercomputers go live their basic computing unit is already out of date?! Seems a little bit weird. Perhaps these supercomputers were always getting the 32 GB variant and NVIDIA didn't want to say anything about it and hear people complain about why can't they also get 32 GB.
I went to the Summit web site and did a quick calculation on their listed system memory numbers and figured that to reach their >10 PB of total system memory for 4600 total nodes there needs to be at least 27 GB of HBM memory per GPU, so perhaps it's true that the Summit GPUs have 32 GB of HBM2.
512*4600 (RAM) + 16*6*4600 (HBM) + 1600*4600 (NVMe disk) = 10156800 GB. No need for 32GB. I don't think Summit has 32GB cards, which is a shame. I wonder if they knew that this was coming. On the other hand for the price tag of the whole machine (< $300M), the cards must have been cheap.
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Yojimbo - Tuesday, March 27, 2018 - link
Before the Summit and Sierra supercomputers go live their basic computing unit is already out of date?! Seems a little bit weird. Perhaps these supercomputers were always getting the 32 GB variant and NVIDIA didn't want to say anything about it and hear people complain about why can't they also get 32 GB.I went to the Summit web site and did a quick calculation on their listed system memory numbers and figured that to reach their >10 PB of total system memory for 4600 total nodes there needs to be at least 27 GB of HBM memory per GPU, so perhaps it's true that the Summit GPUs have 32 GB of HBM2.
ronnybrendel - Wednesday, March 28, 2018 - link
512*4600 (RAM) + 16*6*4600 (HBM) + 1600*4600 (NVMe disk) = 10156800 GB.No need for 32GB.
I don't think Summit has 32GB cards, which is a shame.
I wonder if they knew that this was coming.
On the other hand for the price tag of the whole machine (< $300M), the cards must have been cheap.
Yojimbo - Wednesday, March 28, 2018 - link
10,156,800 GB is only 9.686 PBLord of the Bored - Wednesday, March 28, 2018 - link
"only" 9.686 PBYojimbo - Thursday, March 29, 2018 - link
Did you read the entire thread?mode_13h - Wednesday, March 28, 2018 - link
Ah, perhaps that's why Titan V has remained in stock, lately... they had all that excess inventory of 4 GB HMB2 dies to burn through.