AMD is prepping the launch of its first RDNA 4 graphics cards in the form of the Radeon RX 8800 XT. Based on the Navi 48 GPU, the RX 8800 XT will be the RDNA 4 flagship, succeeding the RX 7800 XT and the RX 7900 series. According to Tom from MLID, Navi 48 will feature 64 Compute Units (CUs) or 4096 shader cores clocked at 2.9 GHz to 3.2 GHz (in-game) clocks.
The Radeon RX 8800 XT will be paired with 16 GB of 20 Gbps GDDR6 graphics memory across a 256-bit. It will have a TBP of 210-280W (RX 7800 XT: 263W), with ray-tracing performance being the focus of the upgrade. The RDNA 4 GPU will feature increased Ray Accelerators (RA) per CU, with FP8 (mixed precision) and matrix (Tensor) hardware acceleration.
The RX 8800 XT is expected to cost between $499-$599, delivering the same performance as the $1,000 GeForce RTX 4080, at least in rasterization. The ray-tracing performance will be comparable to the RTX 4070 Ti/4070 Ti Super, with AMD partner titles performing similarly to the RTX 4080. The Navi 48 GPU will be available in high volumes in the last quarter of 2024, with a reference and AIB variants.
It’ll be interesting to see how the Ray Accelerator on RDNA 4 has evolved. The PS5 Pro leak indicates a 2x increase in BVH intersection bandwidth (4->8), but it’s unclear whether traversal will be offloaded to the shaders or the dedicated RT hardware. There’s also talk of a neural network-based upscaler, but we’re yet to see any concrete info on that.
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