The fresh rumor comes from Kopite7kimi user over at Twitter, suggesting that Nvidia is working on PG1133-SKU15, a fresh new RTX 3080 Ti SKU which will use GA-102-25-KD-A1 GPU with the same FP32 count as the RTX 3090, or 10496 CUDA cores.

The same source also suggests it will have the same memory speed and TGP as the RTX 3080, and come without NVLINK, so you are looking at 20GB of 19Gbps GDDR6X memory on a 320-bit memory interface, and the same 320W TDP.

RTX 3080 Ti FE:
PG133-SKU15,
GA102-250-KD-A1,
20GB GD6X,
the same FP32 count as 3090, 10496FP32,
the same MEM speed and TGP as 3080,
no NVLINK.

— kopite7kimi4virgil (@kopite7kimi) November 4, 2020

Of course, it remains to be seen when Nvidia actually plans to release such an SKU, and, more importantly, what will be the suggested price, as it could get close to the RTX 3090. Nvidia will most likely go for AMD's Radeon RX 6900 XT and have plenty of room between $999, which is the price of the RX 6900 XT, and $1499, which is SEP for the RTX 3090.