Hopper GH100, Nvidia plans 120GB of VRAM

In the professional segment, Nvidia’s high-performance offering is equipped with a Hopper H100 GPU. Depending on the variant (SMX5 card or PCIe card), this graphics chip includes 16,896 CUDA cores or 14,592 CUDA cores.

Either way, we have a 5120-bit memory interface in order to exploit a maximum of 80GB of HBM3 at 3 GHz (SXM5) or HBM2 at 2 GHz (PCIe). Both versions are using the same max capacity of 80 GB at the moment, and we’re defining it at the moment because according to a report this may change soon.

GPU Hopper, Nvidia reveals its main characteristics

Nvidia will consider offering a PCIe version of GPU Hopper H100 Total 120 GB of video memory. On the other hand, we have no information on the nature of VRAM. According to the Chinese website s-ss.cc This new variant with 120GB of VRAM will be equipped with a full-power GH100 chip. It will obviously be fully unlocked.

This move to more VRAM is driven by the rapidly increasing volumes and complexity of HPC workloads. More VRAM becomes necessary to improve performance.

H100 (SMX5) H100 (PCIE) A100 (SXM4) A100 (PCIE4)
GPUs GH100 GH100 GA100 GA100
fineness of inscription 4 nm 4 nm 7 nm 7 nm
number of transistor 80 billion 80 billion 54.2 billion 54.2 billion
matrix area 814 mm 2 814 mm 2 826 mm 2 826 mm 2
SMS 132 114 108 108
TPCs 66 57 54 54
Cores CUDA FP32 16896 14,592 6912 6912
CUDA FP64 cores 16896 14,592 3,456 3,456
basic tensioners 528 456 432 432
textile units 528 456 432 432
Frequency increase ? ? 1410MHz 1410MHz
memory interface HBM3 5120 bit HBM2e 5120 bit HBM2e 6144 bit HBM2e 6144 bit
Memory size Up to 80GB HBM3 @ 3.0Gbps Up to 80GB HBM2e @ 2.0Gbps Up to 40 GB HBM2 @ 1.6 TB/sec
Up to 80 GB HBM2 @ 1.6 TB/s
Up to 40 GB HBM2 @ 1.6 TB/sec
Up to 80 GB HBM2 @ 2.0 TB/s
L2 cache size 51200 KB 51200 KB 40,960 KB 40,960 KB
PDT 700 watts 350 watts 400 watts 250 watts

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