AMD Radeon Pro 555 vs AMD Radeon RX 7900 XT Comparison

The AMD Radeon RX 7900 XT and the AMD Radeon Pro 555 are separated by more than just a generation; they exist in entirely different performance strata. The RX 7900 XT is a high-end desktop GPU built for 4K gaming and heavy compute, while the Pro 555 is a low-power mobile chip designed for basic acceleration in a Mac laptop. The benchmark data confirms a massive gulf, with the RX 7900 XT leading in both shared tests, but the Pro 555 holds its own in the Apple-specific Metal API. The data shows the RX 7900 XT is the clear choice for demanding workloads, while the Pro 555 is only relevant for its specific legacy platform.

The Verdict

Pick the AMD Radeon RX 7900 XT if you need raw performance in modern APIs. It wins both head-to-head tests decisively, with a 9.2% lead in Geekbench OpenCL and a 477.6% lead in Geekbench Vulkan. Its average benchmark score of 13,745 is also higher than the Pro 555’s 13,407. The RX 7900 XT’s percentile ranking of 55th versus the Pro 555’s 54th, while close, slightly favors the newer card in the overall GPU landscape.

Pick the AMD Radeon Pro 555 only if you are bound to a specific system. Its only benchmark win is in Geekbench Metal, a test the RX 7900 XT does not have a score for. The data shows it is a legacy part, with a release date from 2017 compared to the RX 7900 XT’s 2022 launch. For any modern gaming or compute task, the RX 7900 XT is overwhelmingly superior. The Pro 555 is a relic for a niche audience.

The verdict is simple: the RX 7900 XT is a performance part, and the Pro 555 is a basic mobile component. The benchmark results show no real contest in shared workloads, making the RX 7900 XT the only logical choice for performance, while the Pro 555 is relegated to its original purpose.

Architecture Differences

The architectural gap is stark. The RX 7900 XT uses the Navi 31 chip with RDNA 3.0 architecture, built on a 5 nm process at TSMC. The Pro 555 uses the Polaris 21 chip with GCN 4.0 architecture, built on a 14 nm process at GlobalFoundries. This leads to a massive transistor difference: the RX 7900 XT has 57,700 million transistors on a 529 mm² die, while the Pro 555 has just 3,000 million on a 123 mm² die. The RX 7900 XT’s transistor density of 109.1M / mm² is over four times higher than the Pro 555’s 24.4M / mm².

Feature support also diverges. The RX 7900 XT includes 84 ray tracing cores, while the Pro 555 has none. The RDNA 3.0 card supports DirectX 12 Ultimate (12_2) and Vulkan 1.4, whereas the GCN 4.0 card tops out at DirectX 12 (12_0) and Vulkan 1.3. Both support OpenGL 4.6. The RX 7900 XT uses GDDR6 memory, while the Pro 555 uses the older GDDR5. The RX 7900 XT also has a PCIe 4.0 x16 interface, while the Pro 555 is limited to PCIe 3.0 x8. These are not minor tweaks; they represent two completely different design philosophies and eras.

Head-to-Head Benchmarks

The two cards share only two benchmark tests, and the results are lopsided. In Geekbench OpenCL, the RX 7900 XT scores 12,756 against the Pro 555’s 11,682. That is a 9.2% lead for the RX 7900 XT. This is a moderate win, showing the newer card’s advantage in general compute tasks even when the older card is not completely outclassed.

The Geekbench Vulkan test tells a different story. The RX 7900 XT scores 71,068, while the Pro 555 manages just 12,303. This is a 477.6% delta, meaning the RX 7900 XT is nearly six times faster. This massive gap is expected given the architectural differences, but the sheer magnitude is notable. Vulkan is a modern low-level API, and the RDNA 3.0 architecture is clearly optimized for it, while the GCN 4.0 part struggles.

The Pro 555 does have one test in its favor: Geekbench Metal, where it scores 16,236. The RX 7900 XT has no Metal score in the data, so this is a win by default. Metal is Apple’s proprietary API, and this score suggests the Pro 555 is reasonably competent for its intended macOS environment. However, this does not translate to any advantage in cross-platform workloads. The data shows the RX 7900 XT wins the only two comparable tests, with a combined record of 2 wins to 0.

FAQ

Q: Which card is faster in Vulkan?

A: The AMD Radeon RX 7900 XT is dramatically faster, scoring 71,068 in Geekbench Vulkan versus the Pro 555’s 12,303, a 477.6% advantage.

Q: Is the RX 7900 XT better in OpenCL as well?

A: Yes, but by a smaller margin. It scores 12,756 versus the Pro 555’s 11,682, a 9.2% lead.

Q: Does the Pro 555 win any benchmark?

A: Yes, in Geekbench Metal, where it scores 16,236. The RX 7900 XT has no score for this test in the data.

Q: How do their average benchmark scores compare?

A: The RX 7900 XT has an average benchmark score of 13,745, while the Pro 555 averages 13,407. The RX 7900 XT is higher by a small margin.

Q: What is the memory capacity difference?

A: The RX 7900 XT has 20 GB of GDDR6 memory, while the Pro 555 has 2 GB of GDDR5 memory.

Q: Which card has ray tracing support?

A: Only the RX 7900 XT, which includes 84 ray tracing cores. The Pro 555 has no ray tracing cores.

Where Each One Wins

The AMD Radeon RX 7900 XT is the clear winner for any modern workload. Its 477.6% lead in Vulkan makes it the obvious choice for DirectX 12 and Vulkan gaming, as well as any GPU-accelerated compute that utilizes these APIs. Its 9.2% lead in OpenCL also makes it the better option for general compute tasks. The card’s 20 GB of memory and 800.0 GB/s bandwidth provide ample headroom for high-resolution textures and large datasets. The data shows it wins both head-to-head tests, making it the superior part for nearly any use case.

The AMD Radeon Pro 555 wins in exactly one scenario: the Geekbench Metal test, where it scores 16,236. This indicates it is optimized for macOS environments that rely on Metal. If you are using a legacy Mac application that specifically requires Metal acceleration, this card is the one that works. Its 75 W power draw and IGP slot width also make it suitable for ultra-low-power, integrated systems where the RX 7900 XT’s 300 W TDP and dual-slot size are not feasible. However, this is a niche use case. The Pro 555’s 81.60 GB/s bandwidth and 1,305.6 GFLOPS FP32 performance are minuscule compared to the RX 7900 XT’s 800.0 GB/s and 51.48 TFLOPS, respectively. For any task where performance matters, the RX 7900 XT is the only option.

Specification Differences

The two cards differ in nearly every measurable specification. The RX 7900 XT has a 5 nm process node versus the Pro 555’s 14 nm. The RX 7900 XT has 5,376 shading units, 336 texture mapping units, and 192 raster operation pipelines, while the Pro 555 has 768 shading units, 48 TMUs, and 16 ROPs. The RX 7900 XT has 84 ray tracing cores; the Pro 555 has none.

Memory is a major split. The RX 7900 XT has 20 GB of GDDR6 on a 320-bit bus with 800.0 GB/s bandwidth. The Pro 555 has 2 GB of GDDR5 on a 128-bit bus with 81.60 GB/s bandwidth. Clock speeds also differ, with the RX 7900 XT boosting to 2394 MHz and the Pro 555 having no listed boost clock. The RX 7900 XT’s FP32 compute is 51.48 TFLOPS, while the Pro 555 is 1,305.6 GFLOPS. Power consumption is another divider: the RX 7900 XT has a 300 W TDP with two 8-pin connectors, while the Pro 555 has a 75 W TDP with no power connectors.

The bus interface differs, with the RX 7900 XT using PCIe 4.0 x16 and the Pro 555 using PCIe 3.0 x8. The RX 7900 XT has a physical footprint of 276 mm length, 110 mm height, and 51 mm width, while the Pro 555 has no listed dimensions. The RX 7900 XT supports DirectX 12 Ultimate (12_2) and Vulkan 1.4, while the Pro 555 supports DirectX 12 (12_0) and Vulkan 1.3. The RX 7900 XT has a launch MSRP of 899 USD. The Pro 555 has no launch MSRP listed. The RX 7900 XT is also the successor to Navi II and predecessor to Navi IV, while the Pro 555 has no listed predecessor or successor.