This custom Nvidia RTX 5090 mod packs a jaw-dropping 128GB of VRAM

[DragonSlayer101]

WTF?! Factories in China have reportedly started producing custom RTX 5090 graphics cards equipped with 128GB of GDDR7 memory. This represents a significant upgrade over the stock models, which come with only 32GB of VRAM. The modified variants are priced at an eye-popping 1,850 yuan (approximately $13,200), a massive markup compared with the RTX 5090's official $1,999 MSRP in the US.

An Nvidia system management interface screenshot posted by tipster I_Leak_VN appears to show the modified card with 128GB of memory running driver version 550.144.03. If the screenshot is accurate, it would be welcome news for professionals and AI companies, who are the intended audience for an upgraded GPU like this.

Gamers, however, are unlikely to benefit much from the extra RAM and would be better off investing their money elsewhere.

No further details about the modification have been revealed, and some observers have questioned the legitimacy of the screenshot. According to social media discussions, the only feasible way to fit 128GB of VRAM on an RTX 5090 PCB is by combining multiple high-capacity GDDR7 memory dies across dual-sided circuit boards.

Another fun 5090 128G prototype 😂 super limited with ~13.2k USD price 😂 pic.twitter.com/d0ypVglfII

– I_Leak_VN (@I_Leak_VN) September 7, 2025

However, GDDR7 is currently available only in 16Gb and 24Gb densities, which translates to 2GB or 3GB of memory per module, allowing a maximum of 96GB on a dual-sided board. It remains unclear whether semiconductor manufacturers in China have started producing 32Gb modules, or if modders employed another method to cram 128GB of VRAM onto an RTX 5090.

Regardless of the legitimacy of this particular product, Chinese modders have recently begun producing custom Nvidia-based graphics cards for AI workloads. Earlier this year, one group showcased a 96GB variant of the RTX 4090, which normally ships with only 24GB of GDDR6X memory in its stock form.

Last year, an RTX 4090D with 48GB of VRAM and an RTX 4080 Super with 32GB of VRAM were advertised for rent on AutoDL, a Chinese cloud computing platform that leases servers for AI workloads. The modded 4090D reportedly cost around $2,500 – a significant premium over the standard 24GB model's official 12,999 yuan ($1,815) MSRP in China.

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This custom Nvidia RTX 5090 mod packs a jaw-dropping 128GB of VRAM

 

[yRaz]

I want to know how difficult BIOS modding is because this VRAM issue is getting ridiculous. I'd love to put 32-48gigs on a 9070 to put in my homelab. This GPU nonsense needs to end

 

[AnilD]

These cards aren’t for gamers... they’re for AI labs training models that will eventually tell us we overspent on our GPUs.

 

[FF222]

"The modified variants are priced at an eye-popping 1,850 yuan (approximately $13,200),"
1850 yuans are worth ~$260

 

[JamesBlond]

I want to know how difficult BIOS modding is because this VRAM issue is getting ridiculous. I'd love to put 32-48gigs on a 9070 to put in my homelab. This GPU nonsense needs to end

Its called, we own you!! Bleeech, buy what we say, or else

 

[JamesBlond]

Honestly, seeing as VRAM is the same as a road, you can have a super car on a one way street/vram and never go anywhere fast... this is the problem, look while Nvidia was faffing around AMD realesed cards with 16GB 5years at good prices, then come the 12GB version, I mean... whats so difficult to make it standard 24GB and 32GB for the xx80 or xx90 series