According to a tip from Uniko’s Hardware, NVIDIA’s upcoming Ampere flagship, the GeForce RTX 3090 Ti will feature Micron’s 21Gbps GDDR6X memory modules. This would make the 3090 Ti the first gaming GPU (if you ignore the Radeon VII) to cross the 1TB/s bandwidth barrier. The memory modules codenamed “MT61K512M32KP” will reportedly be used for the top-tier SKU. According to publicly available information, these memory chips run at 21Gbps, making them the fastest chips ever produced.
The present Ampere flagship, the GeForce RTX 3090 24GB features 19.5Gbps memory modules paired with a 384-bit bus. This results in an overall memory bandwidth of 963GB/s for the 3090 vs 1TB/s+ on the 3090 Ti. The use of 16Gb or 2GB memory chips will allow NVIDIA to pack 24GB of GDDR6X memory across just 12 packages (vs 24 on the 3090), preventing the need for an actively cooled backplate. The RTX 3090 Ti will be the first GPU to leverage 16Gb chips. At the moment, even the top-tier cards are limited to 8Gb modules.
In addition to faster memory, the RTX 3090 Ti will also feature the full-fat GA102 die with all 84 SMs enabled. This puts the shader count of the GPU at 10,752, TMUs at 336, ROPs at 112, RT Cores at 84, and 336 Tensor cores. This added firepower will come at a cost. As per rumors, the RTX 3090 Ti will have a TDP of 450W, a considerable 100W more than the 3090.