A group of Brazilian modders have found a way to upgrade the NVidia GeForce GTX 970 to 8 GB of VRAM.
The original 512 MB, 7 Gbps GDDR5 memory modules are replaced with 1 GB, 8 Gbps chips and a resistor is added to make the GPU recognize the higher density VRAM ICs.
This upgrade does not fix the fundamental split VRAM issue of the ASIC, but it does provide access to 7 GB of faster, higher-density VRAM.
The benchmark performance of the upgraded GTX 970 shows a significant increase, with nearly a doubling in the Unigine Superposition score.