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Nvidia RTX 3090 Ti with 10,752 CUDA cores and 450 W TDP to feature Micron 21 Gbps GDDR6X, to be first GeForce card in history to offer 1 TB/s memory bandwidth

The upcoming RTX 3090 Ti will offer a 1 TB/s total memory bandwidth. (Image Source: Nvidia)
The upcoming RTX 3090 Ti will offer a 1 TB/s total memory bandwidth. (Image Source: Nvidia)
Nvidia's upcoming RTX 3090 Ti card will use the complete GA102-350 core with 10,752 CUDA cores and 21 Gbps memory speeds. The RTX 3090 Ti is expected to use Micron's latest 2 GB GDDR6X memory modules that can run at 21 Gbps. Combined with a 384-bit wide bus, the RTX 3090 Ti will be the first GeForce card with a 1 TB/s memory bandwidth.

Nvidia has long been rumored to be introducing new Ampere GPU variants early next year. We expect a GA102-350-based RTX 3090 Ti with 10,752 CUDA cores and faster memory. 

The upcoming RTX 3090 variant may not have the Super branding and is speculated to use the Ti moniker instead. The original RTX 3090 features GDDR6X memory with a speed of 19.5 Gbps in 1 GB modules. This meant that the card had to offer 24 such memory chips in order to match the 24 GB onboard VRAM specification. This changes with the upcoming RTX 3090 Ti.

We are now getting to know that the RTX 3090 Ti will feature Micron GDDR6X VRAM with a particular code string that goes like MT61K512M32KPA-21U. This indicates that these modules will have a 21 Gbps memory speed, which is 1.5 Gbps more than the current implementation. Also, Nvidia is expected to use 2 GB modules for the first time, which reduces the total memory chip count to 12. 

The reduction in total number of memory modules by half should theoretically help with better thermals. Nvidia may or may not use a metal backplate this time around since all modules can be directly accommodated on one side of the PCB.

That being said, the RTX 3090 Ti is not expected to be an economical card in terms of power consumption. Current rumors peg the TDP of the card to be 450 W, which is a full 100 W above the current RTX 3090 Founders Edition offering.

The exact real-world performance gains one stands to expect is difficult to guess at the moment. For one, the 384-bit bus and the new 21 Gbps speed should yield a total of 1 TB/s memory bandwidth (the RTX 3090 offers 936 GBps), which is a new record for any GeForce card. Apart from the 10,752 CUDA cores, we also expect the RTX 3090 Ti to feature 84 RT cores, 336 Tensor cores, and 128 ROPs. The clocks are unknown at this point.

Nvidia is expected to launch the RTX 3090 Ti in January following the supposed announcement of the RTX 3070 Ti 16 GB sometime mid-December.

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> Notebook / Laptop Reviews and News > News > News Archive > Newsarchive 2021 11 > Nvidia RTX 3090 Ti with 10,752 CUDA cores and 450 W TDP to feature Micron 21 Gbps GDDR6X, to be first GeForce card in history to offer 1 TB/s memory bandwidth
Vaidyanathan Subramaniam, 2021-11-30 (Update: 2021-12- 3)