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There is no confirmed public explanation in the cited material for why AMD did not present the reported Radeon RX 7900 XTX/XT performance-per-watt comparison with Nvidia’s GeForce RTX 4090. Tom’s Hardware reported that the comparison appeared to have been planned in presentation footnotes but was absent from the presentation. That omission does not, by itself, reveal the benchmark result or AMD’s motive.
What was removed—or not presented?
Tom’s Hardware reported that AMD removed performance-per-watt graphs from recent Radeon RX 7900 XTX and RX 7900 XT presentation materials. The outlet also said footnotes in an AMD performance presentation dated November 15 indicated a planned slide comparing the RX 7900 XTX with the GeForce RTX 4090 for power efficiency, although that slide was not presented. The report supports describing the comparison as omitted; it does not establish what the slide would have shown or why it was missing. Tom’s Hardware’s report
Did AMD explain why?
The cited reporting does not include a confirmed AMD explanation for the omission. Any claim that AMD withdrew the comparison because of an unfavorable result, a change in marketing strategy, or another specific reason would go beyond the evidence available here. A missing slide is not proof of the cards’ relative efficiency.
AMD’s 54% claim was a different comparison
At the November 3, 2022 launch of its RDNA 3 graphics cards, AMD said the architecture delivered “up to 54% more performance per watt than AMD RDNA 2 architecture.” That was a generation-over-generation claim—not a result comparing the RX 7900 XTX with the RTX 4090. AMD’s announcement included internal-test footnotes, so the figure should be read in the context of those test conditions. AMD’s launch announcement
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- Flagship Gaming Performance, AMD Radeon RX 7900 XTX GPU with 2615 MHz boost clock and 24GB GDDR6 memory for elite 4K gaming
- Advanced RDNA 3 Architecture, 96 compute units with RT+AI accelerators and 96MB AMD Infinity Cache technology
- Premium Cooling Solution, Phantom Gaming 3X Cooling System with Striped Ring Fans and reinforced metal frame
- High-Speed Memory, 24GB GDDR6 on 384-bit memory bus delivers exceptional bandwidth for 4K gaming and content creation
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AMD partner material likewise described a 54 percent generation-over-generation improvement based on AMD internal analysis from November 2022. Its stated comparison was the RX 7900 XTX against the RX 6900 XT under specified system and power conditions—not against Nvidia’s RTX 4090. AMD Radeon RX 7900 Series material
Why power specifications alone do not settle efficiency
AMD lists the RX 7900 XTX at 355 W typical board power and recommends a power supply rated at 800 W or greater. Those numbers describe a board-power specification and a system power-supply recommendation; neither establishes how much performance the card delivers per watt compared with an RTX 4090. Efficiency requires performance and power measurements taken under comparable conditions. AMD’s RX 7900 XTX specifications
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- System Compatibility Note: This 2‑slot card measures 249 mm (L) x 132 mm (W) x 41 mm (H) and requires a single 8‑pin power connector. Please verify available chassis clearance and ensure your power supply is rated for a recommended 550W before purchase.
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- Next‑Gen AMD RDNA 4 Architecture: Powered by the AMD Radeon RX 9060 XT GPU with 32 Compute Units featuring 3rd Gen Ray Tracing and 2nd Gen AI Accelerators, delivering exceptional 1440p gaming and AI‑enhanced performance.
- Blazing‑Fast Engine Clock: Delivers a boost clock of up to 3290 MHz and a game clock of 2700 MHz out of the box, providing the raw power for smooth, high‑framerate gameplay.
- 16GB GDDR6 Memory on 128‑Bit Bus: Equipped with 16GB of high‑speed GDDR6 memory running at 20 Gbps, offering ample capacity and bandwidth for modern game textures and creative applications.
What a meaningful RX 7900 XTX–RTX 4090 efficiency comparison needs
A useful head-to-head result depends on more than the GPU names. Readers should be able to see the workload, testing setup, power measurement, and efficiency metric before drawing a conclusion.
- Workload: identify the game or application, resolution, image-quality settings, and whether ray tracing is enabled. Results can vary by workload.
- Test system: state the CPU, system configuration, and driver versions so the comparison can be interpreted in context.
- Power boundary: clarify whether the measurement covers GPU board power or the entire system.
- Metric: explain how efficiency is calculated—for example, frames per watt—and use comparable performance and power data.
- Test provenance: distinguish manufacturer internal testing from independent, repeatable testing, and retain the conditions and caveats attached to each result.
AMD’s official RX 7000-series materials include product-family and performance information, but individual claims should be read with their own stated test details rather than treated as a substitute for a direct RTX 4090 comparison. AMD Radeon RX 7000 Series materials
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