Fully-functional RTX 3070 16GB gets frankensteined into existence by harvesting dead PCBs and RX 6800 XT’s VRAM chips — doubles frame rate in games like Spider Man 2 at 4K and includes switch for 8GB mode

A PC enthusiast has successfully created a fully functional RTX 3070 with 16GB of VRAM by harvesting and reworking parts from defective graphics cards, demonstrating a high level of hardware modding skill. This achievement matters because it could influence DIY GPU upgrades and salvage practices, especially amid ongoing supply shortages and high GPU prices.

The modder, known as AssassinWarlord, started with an RTX 3070 that had defective memory chips and a damaged AMD Radeon RX 6900 XT. They removed the BGA memory chips from both cards, then reballled and integrated them into a single working RTX 3070 with 16GB of VRAM, using custom hardware and BIOS modifications.

This process involved desoldering, reballing the memory chips, and making minor hardware adjustments, such as resistor swaps and configuration switches, to enable the 16GB VRAM mode. The card was tested with standard GeForce drivers, and no additional software modifications were necessary, though some BIOS tweaks were applied to prevent black screens during stress testing.

Why It Matters

This development is significant because it demonstrates a potential pathway for extending GPU lifespan and performance through advanced hardware hacking, especially for enthusiasts and budget-conscious users. The ability to upgrade VRAM capacity without purchasing new hardware could impact GPU salvage, repair markets, and DIY modding communities. Additionally, the mod’s success in modern gaming benchmarks, such as Spider-Man 2, highlights practical benefits in gaming performance.

Background

Previous attempts at modding RTX 3070 cards to 16GB VRAM have been documented, but AssassinWarlord’s approach stands out for repurposing defective parts from two different cards. The process involved detailed hardware work, including removing and reballing memory chips, and software tuning via BIOS adjustments. The mod was first shared on enthusiast forums, where benchmarks showed a doubling of frame rates in some modern titles, illustrating the real-world impact of increased VRAM.

“The whole thing was actually not that difficult, the main challenge was in the fine hardware work.”

— AssassinWarlord

“The VRAM switch and BIOS tweaks allowed the card to run with 16GB without extra drivers, which is impressive.”

— Forum participant

What Remains Unclear

It is not yet clear how durable or stable the modded GPU will be over long-term use, or whether similar approaches can be reliably scaled for broader adoption. Further testing and validation are needed to confirm its viability in various workloads.

What’s Next

Further testing is expected to assess the long-term stability and performance of the modded GPU. Enthusiasts and hardware developers may explore similar methods, and potential commercial or DIY tools could emerge to facilitate such modifications. Official responses from GPU manufacturers or hardware communities are still pending.

Key Questions

Can this mod be replicated easily at home?

This mod requires advanced hardware skills, including desoldering, reballing, and BIOS tuning. It is not recommended for casual hobbyists without proper equipment and experience.

Will this mod affect the GPU’s warranty?

Yes, performing such hardware modifications will void the warranty and could damage the GPU if not done correctly.

Is the performance gain significant enough for everyday use?

Benchmarks show notable improvements in VRAM-intensive tasks and modern games, such as doubling frame rates in Spider-Man 2 at 4K, making it relevant for high-end gaming and creative workloads.

Are there risks involved with this type of hardware hacking?

Yes, risks include hardware failure, instability, and potential damage to the GPU components. Long-term reliability remains unverified.