GeForce RTX 3090 gets 24GB GDDR6X and GeForce RTX 3080 to have 10GB GDDR6X
Amazon.com: MSI GeForce RTX 3080 Ti SUPRIM X 12G Gaming Graphics Card - 12GB GDDR6X, 1845 MHz, PCI Express Gen 4, 384-bit, 3X DP v 1.4a, HDMI 2.1 (Supports 4K) : Electronics
There is no RTX 3080 Ti: RTX 3090 has 24GB RAM, RTX 3080 has 10GB RAM
Amazon.com: ASUS ROG STRIX NVIDIA GeForce RTX™ 3080 White OC Edition Gaming Graphics Card (PCIe 4.0, 10GB GDDR6X, HDMI 2.1, DisplayPort 1.4a, White color scheme, Axial-tech Fan Design, 2.9-slot, Super Alloy Power :