this is not a new kind of mod, and it existed from many years now and has been demonstrated in 30 series GPU also (see https://news.ycombinator.com/item?id=2638

this is not a new kind of mod, and it existed from many years now and has been demonstrated in 30 series GPU also (see https://news.ycombinator.com/item?id=26389996 https://news.ycombinator.com/item?id=26389996 from 3+ years ago). i am still unsure why doubling the vram works so seemlessly, but i wonder if you need modifications at driver/vbios level to fully utilize the new capacity.