AMD’s RX 9070 XT hits 91 FPS in a DirectX ray-tracing test, with caveats
An independent test by graphics enthusiast Osvaldo Pinali Doederlein, reported by Wccftech, recorded 91 FPS on AMD’s RX 9070 XT using Microsoft’s new DirectX ray-tracing features, against 1.7 FPS with the conventional method. The test also found nearly 90% less memory use, but the largest gains came from an unusually geometry-heavy workload; Wccftech notes that games would need engine changes to use the technology.
Bottom line — At 4K, the same test’s uplift was 17.5×, not 54×; game developers still need to implement the features.
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Wccftech reports memory use fell from 7,518 MB to 771 MB in the test.
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The 54× result came after the tester increased the workload to 10,000 additional BLASes; with the sample’s default 100, Clustered Geometry was about twice as fast, Wccftech says.
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At 4K, performance rose from 1.6 FPS to 28 FPS, according to Wccftech.
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The improvement mainly reduced the cost of rebuilding ray-tracing acceleration structures, rather than making ray traversal substantially faster.
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Wccftech says the test scene contained about 91 million triangles and used a preview driver on an RX 9070 XT.
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AMD’s preview driver supports RDNA 4 GPUs, including the RX 9000 series; Wccftech says support for older cards is uncertain.