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AMD's cancelled RDNA 4 GPU could have doubled the 7900 XTX's performance

A Radeon RX 8900 XTX would have featured 9 shader engines, 200 compute units, and up to 20 chiplets
Rumor mill: It has long been suspected that the Radeon RX 8000 series – AMD's next generation of graphics cards – will focus exclusively on affordable mid-range products. However, this wasn't always the plan. Newly unveiled code suggests that AMD canceled a flagship RDNA 4 model that might have directly competed with upcoming high-end offerings from Intel and Nvidia.
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This techie created a GPU from scratch in under two weeks

Designing custom CPUs and GPUs has become something of a trend for hobbyists of late
In brief: Building your own graphics card is the kind of undertaking that most people wouldn't even dream of attempting. But for one enterprising engineer known as "adammaj" on X/Twitter, constructing a GPU from the ground up wasn't just a crazy idea; it was a challenge conquered in just two weeks, even "with no prior experience."