Chip NVIDIA AD103 e AD104 che alimentano RTX 4080 Serie dettagliata

Here’s our first look at the "AD103" and "AD104" chips powering the GeForce RTX 4080 16 GB e RTX 4080 12 GB, rispettivamente, thanks to Ryan Smith from Anandtech. These are the second- and third-largest implementations of the GeForce "Ada" architettura grafica, con il "AD102" powering the RTX 4090 being the largest. Both chips are built on the same TSMC 4N (4 nm EUV) silicon fabrication process as the AD102, but are significantly distant from it in specifications. Per esempio, the AD102 has a staggering 80 percent more number-crunching machinery than the AD103, and a 50 percent wider memory interface. The sheer numbers at play here, enable NVIDIA to carve out dozens of SKUs based on the three chips alone, before we’re shown the mid-range "AD106" in the future.

The AD103 die measures 378.6 mm², significantly smaller than the 608 mm² dell'AD102, and it reflects in a much lower transistor count of 45.9 miliardi. The chip physically features 80 multiprocessori in streaming (SM), che funzionano a 10,240 Colori CUDA, 320 tensore di colore, 80 nuclei RT, e 320 TMU. The chip is endowed with a healthy ROP count of 112, and has a 256-bit wide GDDR6X memory interface. The AD104 is smaller still, with a die-size of 294.5 mm², a transistor count of 35.8 miliardi, 60 SM, 7,680 Colori CUDA, 240 tensore di colore, 60 nuclei RT, 240 TMU, e 80 ROP. Ryan Smith says that the RTX 4080 12 GB maxes out the AD104, which means its memory interface is physically just 192-bit wide.