A modder has turned a GeForce RTX 3070 into a 16 GB card by transplanting memory chips from a dead Radeon RX 6900 XT onto Nvidia’s board. It is the kind of hardware surgery that sounds absurd until the benchmarks start behaving better than the stock card ever could.
How the RTX 3070 was pushed to 16 GB
The builder, known as AssassinWarlord, started with a broken RTX 3070 that had faulty memory chips and paired it with an AMD Radeon RX 6900 XT whose GPU was dead but whose memory was still useful. After moving the chips over, the card needed more than soldering: a resistor swap and a VRAM Config switch set to 8/16 GB were also required so the system would recognize the full capacity.
The final setup uses eight 16-gigabit Samsung chips. Just as important, it booted and ran without special drivers or extra software, which is the part most hacks fail at. Standard GeForce drivers identified the card normally in games and everyday apps, so this was not a stunt locked behind a lab-only workaround.
What worked, and what still broke
It was not flawless. The system could show a black screen when closing heavy GPU utilities, and the culprit was traced to memory timings in the BIOS for the 16 GB configuration. A temporary fix involved changing the DisableDynamicPstate registry setting in Windows, which stops the card from dropping clocks too aggressively after load.
That workaround comes with a price: idle power rises to about 70 W. So yes, the mod fixes a very specific problem, then creates a very different one. Enthusiast hardware always finds a way to charge rent.
Games that expose the 8 GB ceiling
The payoff shows up in modern AAA games that are hungry for VRAM. In Marvel’s Spider-Man 2 at 4K Very High, the modified RTX 3070 with 16 GB delivered about 40+ fps, roughly double the 20 fps seen on the 8 GB version.
- Base card: GeForce RTX 3070
- Memory source: Radeon RX 6900 XT
- Final memory capacity: 16 GB
- Memory chips used: eight 16-gigabit Samsung chips
- Reported drawback: about 70 W idle power after the registry tweak
The larger story here is familiar: older GPUs are increasingly limited by memory size rather than raw shader muscle, especially in newer games built to chew through VRAM. Nvidia’s midrange cards from that era are now colliding with that ceiling, and modders are doing what vendors usually won’t-making the hardware fit the software instead of the other way around. The next question is how many more of these cards can be revived before the BIOS and power draw make the whole exercise more trouble than it’s worth.