AMD Radeon RX 7900 XT Over 2x Faster in Ray Tracing, Being Tested by Board Partners [Rumor]

AMD’s next-gen RDNA 3 flagship is already in the hands of board partners who are tuning them for their respective PCBs and heatsinks. Based on the modular (chiplet) Navi 31 core, the Radeon RX 7900 XT will combine one 5nm Graphics Compute Die (GCD) with six 6nm Memory Complex Dies (MCDs). The former will pack 12,288 shaders across 48 Work Group Processors (WGPs) and six shader engines (SEs).

GPU NameRX 7700 XT (Navi 33)RX 7800 XT (Navi 32)RX 7900 XT (Navi 31)RX 7950 XT (Navi 30?)
Process Node6nm5nm + 6nm5nm + 6nm5nm + 6nm
Die Config6nm x15nm x1, 6nm x45nm x1, 6nm x55nm x1, 6nm x6
Shader Engines2466
Memory Bus128-bit256-bit320-bit?384-bit?
Memory Capacity8GB16GB20GB?24GB?
Infinity Cache64MB128MB192MB192MB?
LaunchQ4 2022Q1 2023Q4 20222023

Each of the MCDs will consist of 16MB of Infinity “L3” cache 3D stacked with another 16MB or 32MB per die paired with a 64-bit memory controller. This gives you 192MB of LLC alongside a 384-bit memory bus. According to Greymon55, board partners (AIBs) have already received the first wave of RDNA 3 chips and are testing them for next month’s release.

The performance looks mighty impressive with a gen-over-gen uplift of 2x in raster workloads and over 2x in ray-traced games. This means that the Radeon RX 7900 XT will perform roughly the same as the RTX 4090 in rasterized titles but likely lag behind in ray-tracing. Even a 2x gain in RT won’t be enough to match the RTX 4090 as its successor; the RTX 3090 is already up to twice as fast as the RX 6900 XT.

And then you’ve got DLSS 3, which more than doubles performance in supported titles. By the time the RTX 40 series parts land, we should have at least 50 titles supporting it, with 2 out of 3 new releases featuring it. AMD’s FSR 2 upscaler looks pretty solid but still suffers from limited adoption and won’t be a match for DLSS 3. RDNA 3 promises a massive upgrade in efficiency (up to 50% higher performance per watt), but in the end, it’ll be raw performance and upscaling tech that will decide this round.

Areej Syed

Processors, PC gaming, and the past. I have written about computer hardware for over seven years with over 5000 published articles. I started during engineering college and haven't stopped since. On the side, I play RPGs like Baldur's Gate, Dragon Age, Mass Effect, Divinity, and Fallout. Contact:
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