Key Takeaways
1. Nvidia’s Rubin CPX AI GPU features a monolithic die with 128 GB of GDDR7 memory, designed for high performance in AI tasks.
2. Speculations suggest that the Rubin CPX could be the basis for the upcoming GeForce RTX 6090, but its specialized design raises doubts about compatibility.
3. The RTX 50 Super series is expected to debut at CES 2026, leading to the belief that the RTX 60 series will not be revealed until late 2026.
4. Technical insights indicate that the Rubin CPX may not be suitable for the RTX 6090 due to its lack of video output and focus on AI inference.
5. Current GPU prices have stabilized, making it a good time to buy, with popular models like the RX 9070 XT and RTX 5080 available at reasonable prices.
As 2026 approaches, chatter about the upcoming desktop gaming GPUs is intensifying. We’ve gathered plenty of information regarding AMD’s forthcoming RDNA 5 series along with the AT4, AT3, AT2, and AT0 GPUs. However, Nvidia’s intentions for the GeForce RTX 60 series remain somewhat of a mystery. This changed for some when Nvidia presented the Rubin CPX AI GPU earlier in September.
Rubin CPX Specifications
The Rubin CPX boasts a monolithic die equipped with 128 GB of GDDR7 memory. Nvidia claims that this GPU is designed to offer “extremely high performance and energy efficiency for AI inference tasks”. More specifically, it’s crafted for “handle million-token coding and generative video applications”.
Speculations on RTX 6090
Interestingly, there have been numerous online speculations suggesting that the Rubin CPX die could potentially serve as the foundation for the GeForce RTX 6090. This theory is partially supported by the timing of the Rubin CPX’s launch, scheduled for late 2026. Rumors indicate that Nvidia will introduce the RTX 50 Super series GPU at CES 2026, implying that the next-gen RTX 60 series will probably not be revealed until the end of 2026.
Moore’s Law Is Dead has attempted to clarify the speculation about the Rubin CPX being the core of the RTX 6090. Referencing a source within Nvidia, the leaker asserts that the Rubin CPX is “highly specialized for Prefill/Inference”. Allegedly, this monolithic die does not even feature a video output, and according to MLID’s source, Nvidia has no intention of integrating this GPU with a separate media die.
Timing for Upgrading GPUs
While it’s conceivable that Nvidia might adjust the Rubin CPX for the RTX 6090, the technical information shared by MLID in their video regarding why the Rubin CPX isn’t likely suitable for the RTX 6090 seems to be quite persuasive.
Regardless of the outcome, if you’re in need of a graphics card, it’s wise not to wait for the next-gen GPUs. Right now is an excellent time to purchase a new graphics card, as GPU prices have settled significantly and are no longer as outrageous as they were in early 2025. Popular GPUs like the RX 9070 XT and the RTX 5080 are available without excessive surcharges. Even models like the RTX 5060 Ti 16 GB can be found at attractive discounts.
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