A hardware modder has successfully created a functional 16GB version of the NVIDIA RTX 3070 graphics card. The project involves transplanting memory chips from a broken AMD Radeon RX 6900 XT donor GPU. This modification allows the older NVIDIA card to access significantly more video memory than its original design intended.
Transplanting memory chips from a broken AMD Radeon RX 6900 XT donor GPU allows the older NVIDIA card to access significantly more video memory than its original design intended.
The base RTX 3070 typically ships with 8GB of VRAM. The modder replaced these chips with eight 2GB Samsung GDDR6 packages sourced from the AMD card. The process required reballing the memory packages and using a 3D-printed stencil for precise soldering. A physical switch was also installed to toggle between the native 8GB mode and the expanded 16GB mode.
Spec comparison
| Spec | RTX 3070 (Modded) |
|---|---|
| VRAM Capacity | 16GB |
| VRAM Type | Samsung GDDR6 |
| Idle Power Consumption | ~70W |
Testing in Marvel's Spider-Man 2 at 4K resolution with Very High settings showed dramatic performance gains. The 8GB mode struggled with approximately 20fps due to memory constraints. Switching to the 16GB mode allowed the card to use 13.3GB of VRAM, which doubled the frame rate to over 40fps. Stability required a registry tweak to disable dynamic power states, keeping the card in P0 mode and resulting in an idle power consumption of roughly 70W.
Evidence suggests NVIDIA internally experimented with a 16GB RTX 3070 design but did not finalize the implementation. This conclusion is drawn from BIOS timing tables that exist but remain incomplete. The modder's work demonstrates that the hardware potential was likely there, but the product was never released to the market.
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