AMD's next generation graphics hardware is here! digitalfoundry gets to grips with the brand new Radeon RX 7900 XTX and RX 7900 XT:
349W/36fps - 9.7 Joules Per Frame306W/30fps - 9.0 Joules Per FrameForza Horizon 5, 4K, Extreme, RT Off344W/113fps - 3.04 Joules Per Frame309W/175fps - 1.77 Joules Per Frame, we saw some impressive efficiency from Nvidia - a drop of 30-50 percent in power consumption per frame compared to RTX 2080 and 3080. However, AMD doesn't perform as well with RDNA 3.
On the flipside, Hitman 3 with RT disabled is much closer to Nvidia in terms of efficiency - and is more impressive up against RDNA 2's RX 6900 XT. There's 24 per cent power reduction for the RX 7900 XTX against its preceding flagship, rising to 26 per cent with the slightly-more-efficient RX 7900 XT.
Moving onto RT titles, we should expect Nvidia to be far more efficient owing to its dedicated RT hardware and higher performance - and it clearly is. Up against the RX 6900 XT though with Control, there's a 27 percent reduction in power for the 7900 XTX, dropping to 24 percent with the 7900 XT. Moving onto Dying Light 2's new benchmark, the RX 7900 XTX sees a 27 percent reduction in power consumption, while the XT model sees that increase a touch to 28 percent.
The overall takeaway is that the RDNA 3 cards consume more power than the RX 6900 XT, and while the frame-rate increase is proportionately higher than the increase in power draw in three of the four tests, I would have hoped to have seen better results overall. Meanwhile, the Forza Horizon 5 result is baffling, showing very little improvement from a revised architecture and a superior process node.
Now let's move onto the benchmarks, but before we kick off, here's a quick outline of the new PC we've built to help test this new generation of GPUs. Sitting at the heart of our system is an Intel Core i9 12900K, running with P-cores at 5.2GHz and E-cores at 3.9GHz. The CPU is augmented with 6000MT/s Trident Z5 RGB DDR5 memory from G-Skill. The Noctua NH-D15 is our cooler of choice for handling the powerful processor, while all titles are run from PCIe Gen 3 NVMe SSDs.
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