GA103, some photos and more information for the GeForce RTX 3080 Ti mobile GPU
In the range of graphics chips NVIDIA Ampere a new GPU called GA103, developed by the engineers of the US company for the GeForce RTX 3080 Ti destined for the world of notebooks, a solution announced at CES 2022 and debuting in February on notebooks with 12th generation Intel Core CPUs.
NVIDIA has never publicly talked about this GPU in depth, but the release of the first reviews of the Alder Lake laptops gives us a way to both see it and complete the specs puzzle. Chinese youtuber Geekerwan has posted a video where it shows the chip, labeled “GN20-E8-A1“, and discusses its technical characteristics.
The GA103 GPU would appear to occupy an area of 496 mm2 about, which means that is 26.5% larger than GA104 (392 mm2) than the 3070 Ti mobile, but at the same time it is smaller (-21%) than the GA102 (628 mm2) used by NVIDIA for desktop GPUs. The chip is expected to offer up to 7680 CUDA cores, which means + 25% over the GA104’s 6144 cores. However, as is the case for other models, in the case of the RTX 3080 Ti the chip sees fewer active CUDA cores, equal to 7424.
Not only the CUDA cores, but in the case of the new top of the mobile range from NVIDIA also the memory controllers would have been disabled: the GA103 chip should in fact have 10 32-bit controllers for a maximum bus of 320 bits, but the GeForce RTX 3080 Ti mobile has a 256-bit interface.
It is not known whether NVIDIA plans to use the GA103 also in the desktop environment. There have been rumors of the possible arrival on the market of a GeForce RTX 3060 Ti based on this GPU, perhaps as a way to improve its availability, certainly not to significantly change its performance.
If so, the RTX 3060 Ti with its 4864 CUDA cores would use the GA103 by just over 60%. Other sources, however, speak of a use on the RTX 3070 Ti (6144 CUDA core). We just have to wait, only time will tell if the GA103 will prove to be a “mobile only” graphics chip like (for the moment) the GA107 of the RTX 3050/3050 Ti mobile or if it will also make the leap to dedicated video cards.