Downgrade? Nvidia’s RTX 5090 reportedly features 28 GB of GDDR7 memory on a 448-bit bus

New Nvidia 28GB RTX 5090 rumour creates space for an RTX 5090 Ti or an RTX Titan Blackwell

A new report from the leaker panzerlied on Chiphell has claimed that Nvidia’s upcoming RTX 5090 will not utilise the full memory capabilities of the company’s Blackwell-based GB202 silicon. Now, it has been claimed that Nvidia’s RTX 5090 will be a 28GB graphics card that uses a 448-bit GDDR7 memory bus. This is much smaller than the 512-bit memory bus that Nvidia’s GB202 silicon reportedly features.

With a 448-bit memory bus and 28 Gbps of GDDR7 memory, a hypothetical 28GB GeForce RTX 5090 could feature 55% more memory bandwidth than Nvidia’s RTX 4090. This is due to its faster GDDR7 memory, and its larger memory bus.

Offering 28GB of GDDR7 memory instead of 32GB over a 512-bit memory bus could be a way for Nvidia to make their RTX 5090 more affordable/profitable. After all, GDDR7 memory is brand new, making it an expensive product. Does Nvidia need the extra memory and bandwidth to reach their performance targets? If not, there is little reason for them to max out their GB202 silicon with their RTX 5090. This is especially true given AMD’s apparent lack of high-end RDNA 4 graphics cards.

An RTX 5090 Ti or RTX Titan Blackwell is now a distinct possibility

If Nvidia aren’t using the full potential of their GB202 GPU silicon, there is a real chance that the company will create a higher-end Blackwell-based GPU. This could be an RTX 5090 Ti graphics card, RTX 5090 SUPER, or a RTX Titan Blackwell product. These potential GPUs could feature more CUDA cores and feature 32GB of GDDR7 memory over a 512-bit memory bus. This gives Nvidia the ability to release a stronger flagship GPU if they want to or need to.

You can join the discussion on Nvidia’s RTX 5090 having 28GB of VRAM on the OC3D Forums.

Mark Campbell

Mark Campbell

A Northern Irish father, husband, and techie that works to turn tea and coffee into articles when he isn’t painting his extensive minis collection or using things to make other things.

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