Bios of AMD Radeon Instinct MI100 with Arcturus GPU appears online
Website TechPowerUp owns the bios of the Radeon Instinct MI100 accelerator. That is probably the first card where AMD uses its Arcturus GPU. The GPU accelerator for servers gets 32GB hbm2.
According to TechPowerUp, the Instinct MI100 will have an Arcturus GPU with 128 compute units and 8192 shader cores. According to the site, the bios shows that the card has a TDP of 200W. Given the size of the GPU, that is low; the current Instinct MI60 has a tdp of 300W, that card is based on a Vega 20 gpu made at 7nm and has 64 cu’s with 4096 cores.
TechPowerUp says the bios contains several clocktables that suggest the maximum GPU speed is 1334MHz. That is a lot lower than what current Navi and Vega GPUs achieve. The low clock speeds explain the low tdp, but it’s not clear if these are the final values for the card.
The bios shows that the MI100 supports both Samsung and Hynix hbm2. The card gets 32GB hbm2 and that could be good for a memory bandwidth of 1TB/s, if the card gets a 4096bit wide memory bus.
Although the Acturus GPU is a lot bigger than the current Navi GPUs, this is not the ‘big Navi chip’ that has been talked about for some time. The Arcturus GPU is presumably intended specifically for accelerators in servers and more related to the Vega architecture. The current Instinct cards are based on Vega 20 GPUs, which were the first 7nm GPUs from AMD. The Arcturus GPUs are also reportedly made at 7nm.
Radeon Instinct MI100 BIOS