Modified RTX 5090 GPUs With 96GB VRAM Surface in China

Ender Öztürk

September 17, 2026

Independent manufacturers in China have introduced a custom-modified version of the Nvidia RTX 5090, featuring a massive 96 GB VRAM capacity. This significant hardware alteration triples the standard memory capacity of the flagship card, making it a prominent subject in the current technology market. Listed on platforms like Alibaba, these modified RTX 5090 units are being sold at starting prices of approximately $3,888, with some premium versions reaching as high as $5,900. While these cards offer unprecedented memory for consumer-grade hardware, they represent unofficial modifications that bypass standard Nvidia specifications, catering primarily to the specialized needs of AI developers and researchers.

Technical Modifications Require Specialized Engineering

The engineering behind these 96 GB RTX 5090 cards involves a complete overhaul of the original graphics card architecture. By utilizing a custom-designed PCB that allows for the installation of memory chips on both sides of the board, technicians successfully expand the capacity from the stock 32 GB to 96 GB. To ensure the GPU recognizes this expanded memory pool, creators must implement custom firmware. This process relies on the capabilities of the GB202 GPU architecture, which is also utilized in professional-grade Nvidia RTX Pro 6000 Blackwell solutions.

However, the quality of these modifications varies significantly across the market. While some workshops employ advanced GDDR7 memory, other listings have been found to contain older, slower GDDR6X components that operate at significantly lower speeds. Furthermore, ultra-high-capacity prototypes featuring 128 GB of VRAM have appeared with price tags reaching $13,000, though these remain rare, experimental units rather than mass-produced consumer hardware.

Artificial Intelligence Drives Persistent Demand

The primary motivation for these modifications is the growing requirement for high-bandwidth, high-capacity memory in large-scale AI applications. As companies navigate strict US export restrictions on high-performance data center hardware, the Chinese market has increasingly turned to these modified consumer GPUs. Although Nvidia provides official alternatives like the RTX 5090D V2, these models often come with performance limitations that do not meet the needs of researchers training large language models.

This trend of hardware modification is not entirely new to the region. Previous efforts successfully doubled the memory capacity of RTX 4090 cards to 48 GB, proving that local workshops have gained significant expertise in high-end GPU rework. Despite this technical proficiency, the lack of official validation remains a critical concern for potential buyers. Because these cards are significantly altered from their original factory state, Nvidia refuses to provide technical support or warranty coverage, shifting all operational risks onto the end-user.

Given the immense memory capacity and the potential for accelerating complex AI tasks, would you be willing to sacrifice a formal manufacturer warranty to gain access to such specialized hardware performance? Share your thoughts on whether this trade-off is justified in the comments section below.