If nvidia or amd made a 12gb vram gpu equivalent of the 3060ti I definitely would buy it, why design the 3060 to have 12gb of vram but make the 3060ti and the 4060ti with 8gb of vram?
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It’s a matter of cost. Huge amounts of RAM are of little benefit to lower GPUs, as it’s rarely the limiting factor in that situation.
RAM and designing a graphics processor cable of using a large amount are expensive.
You don’t need more VRAM when the RTX 4060 Ti leverages the AD106 architecture, which yields improvements in efficiency and performance when compared to the GA104 architecture of the RTX 3060 Ti. They will have a 16GB variant for the RTX 4060 Ti in July, so your VRAM point is kind of irrelevant. In other words, VRAM isn’t everything.
NVIDIA doesn’t really pick it, they sell the chips (the GPU), marrying it to VRAM is something that the card manufacturer does. They’ll have min and max numbers for the GPU and possibly advertising rules (it’s called X when it has more than Y VRAM, and called Z if it has less).
As for why, it’s a balance with cost and performance and what people are willing to pay. Adding double the VRAM doesn’t usually double the performance, but it could nearly double the price.
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