Technically, the AD102 silicon of the original RTX 4090 comprises 72 TPCs (144 SM), enabling 64 TPCs (128 SM). The RTX 4090D, however, employs 57 TPCs (114 SM), leading to a reduction in CUDA cores, Tensor cores, and RT cores. Specifically, the RTX 4090D houses 14,592 CUDA cores, 456 Tensor cores, and 114 RT cores, compared to the 16,384 CUDA cores, 512 Tensor cores, and 128 RT cores in the standard RTX 4090. Both models operate at similar clock speeds, with a maximum boost clock of 2.52 GHz, but the RTX 4090D has a 25 W lower total graphics power (TGP). The memory subsystem in both versions remains consistent.
Furthermore, the RTX 4090D's overclocking potential is limited, with reduced slider limits, to prevent achieving AI inference performance on par with the standard RTX 4090. NVIDIA has priced the RTX 4090D at RMB ¥12,999 ($1,850).
