AMD are trying its best to compete with Nvidia’s Ampere … well, at the least the newest Radeon MI100 “Arcturus” GPU, based on CDNA architecture will feature 120 Compute Units (CUs).
Taken from Videocardz … AMD’s upcoming compute accelerator based on ‘new’ CDNA architecture is now expected to launch by the end of this year for EPYC-based systems, AdoredTV claims.
The specifications of the Radeon MI100 are still unknown, but we had first bits of information leaked back in February. A BIOS file revealed that the accelerator features 32GB of HBM2 memory. This has been supported by the latest article at AdoredTV.
The website further claims that the MI100 will feature 120 Compute Units. Assuming that the CDNA architecture features 64 Processors per Cluster, it would mean that the accelerator has 7680 cores in total (if each Compute Unit had 64 cores). We are intentionally not calling them Stream Processors, because we are unsure if this is the exact name for this architecture.
What does not make sense, however, is the 42 TFLOPs claim on the slide. This would put make MI100 more than twice as fast as NVIDIA Ampere A100 (19.5 TFLOPs). To achieve 42TF, it would require either: 7680 cores running at 2.75 GHz or 15360 cores running at 1350 MHz. The latter would suggest that each CU contains 128 cores, not 64.