AMD Radeon Pro 455 vs AMD Radeon RX 9070 XT Comparison

The AMD Radeon RX 9070 XT and AMD Radeon Pro 455 represent two completely different eras of GPU design, separated by nearly a decade of architectural evolution. The data reveals a staggering performance gulf, but the comparison is more nuanced than raw speed alone, as the Pro 455 was built for a specific mobile niche. Benchmark results show the RX 9070 XT dominating in every shared test, yet the Pro 455's legacy lies in its efficiency and portability, not its horsepower.

Head-to-Head Benchmarks

The direct comparison is limited to two shared benchmarks, but the results are decisive. In Geekbench OpenCL, the RX 9070 XT scores 17,428 against the Pro 455's 10,336, a 68.6% advantage. This is a substantial lead, indicating the newer card handles compute workloads with far greater ease, likely due to its massive shader count and modern architecture.

The Geekbench Vulkan test is where the gap becomes a canyon. The RX 9070 XT posts 65,879 points, while the Pro 455 manages only 12,240. That is a 438.2% difference, meaning the RX 9070 XT is over five times faster in this API. This is not a marginal improvement; it is a generational leap. The Vulkan result highlights how the Pro 455, with its GCN 4.0 architecture and 768 shading units, is simply overwhelmed by the RX 9070 XT's 4,096 shading units and RDNA 4.0 design.

Looking at the broader average benchmark scores, the RX 9070 XT holds an avgBenchmarkScore of 13,543, while the Pro 455 sits at 12,831. While the RX 9070 XT's average is only 0.1% higher than its nearest rival (AMD Radeon HD 7770M), the Pro 455's average is nearly identical to its closest competitor (NVIDIA GeForce GTX 590 with a 0% delta). This tells a story: the RX 9070 XT's average is dragged down by low scores in older DirectX tests (like Passmark DirectX 9 at 353 and Passmark DirectX 10 at 154), which are irrelevant to its modern capabilities. The Pro 455 lacks these legacy test scores entirely, making its average more reflective of its actual performance profile.

The data shows the RX 9070 XT wins both head-to-head tests, but the magnitude of the Vulkan win is the key insight. It suggests that the newer card is not just faster; it is architecturally superior for modern graphics APIs, which is expected given the Pro 455's 2016 origins.

The Verdict

The verdict is clear from the data: the AMD Radeon RX 9070 XT is the superior performer in every measurable category. Its 2 wins in head-to-head benchmarks versus the Pro 455's 0 is a complete shutout. The RX 9070 XT also holds a higher percentileVsAllGpus at 55 compared to the Pro 455's 52, indicating it outperforms a larger percentage of the GPU population.

For anyone building a desktop system, the RX 9070 XT is the only logical choice. Its 16 GB of GDDR6 memory, 644.6 GB/s bandwidth, and 48.66 TFLOPS of FP32 performance are in a different league. The Pro 455, with its 2 GB of GDDR5 and 81.28 GB/s bandwidth, is a relic. However, the Pro 455's 35 W TDP and MXM Module form factor make it a viable option for ultra-thin laptops where the RX 9070 XT's 304 W TDP and dual-slot design are impossible.

The data does not support the Pro 455 as a performance alternative. It is an efficiency-first product. So, the verdict depends on the use case: the RX 9070 XT for any desktop workload, and the Pro 455 only for specific legacy mobile systems that require its low-power, modular design.

Architecture Differences

The architectural gap is vast. The RX 9070 XT uses the Navi 48 chip built on RDNA 4.0, while the Pro 455 uses the Baffin chip with GCN 4.0. This is a fundamental shift in design philosophy. RDNA 4.0 is optimized for gaming and compute efficiency, while GCN 4.0 was AMD's compute-focused architecture from the mid-2010s.

The process node is a major divider: the RX 9070 XT is fabricated on 4 nm by TSMC, whereas the Pro 455 uses 14 nm from GlobalFoundries. This explains the transistor density difference — the RX 9070 XT packs 53,900 million transistors into 357 mm² (a density of 151.0M / mm²), while the Pro 455 has only 3,000 million transistors on 123 mm² (24.4M / mm²). The newer process allows for far more complex hardware.

Feature-wise, the RX 9070 XT includes 64 ray tracing cores, a capability entirely absent from the Pro 455. The RX 9070 XT also supports DirectX 12 Ultimate (12_2) and Vulkan 1.4, while the Pro 455 is limited to DirectX 12 (12_0) and Vulkan 1.3. These API differences mean the RX 9070 XT can handle modern rendering techniques like DXR and mesh shaders, which the Pro 455 cannot.

The memory architecture differs too. The RX 9070 XT uses GDDR6 on a 256-bit bus, while the Pro 455 uses GDDR5 on a 128-bit bus. This, combined with the clock speeds, results in the RX 9070 XT's 644.6 GB/s bandwidth versus the Pro 455's 81.28 GB/s — an eightfold difference. The RX 9070 XT also has 256 TMUs and 128 ROPs, compared to the Pro 455's 48 TMUs and 16 ROPs, explaining the massive texture and pixel rate differences.

Specification Differences

The specification table highlights several key differences. The processNode is 4 nm for the RX 9070 XT versus 14 nm for the Pro 455. The transistors count is 53,900 million versus 3,000 million. The dieSize is 357 mm² versus 123 mm². Memory size is 16 GB versus 2 GB, and memory type is GDDR6 versus GDDR5. The busWidth is 256 bit versus 128 bit.

The shadingUnits are 4,096 versus 768. The TMUs are 256 versus 48, and the ROPs are 128 versus 16. The TDP is 304 W versus 35 W. The slotWidth is Dual-slot versus MXM Module. The powerConnectors are 2x 8-pin versus None. The busInterface is PCIe 5.0 x16 versus PCIe 3.0 x8.

The displayOutputs are 1x HDMI 2.1b, 3x DisplayPort 2.1a versus Portable Device Dependent. The productionStatus is Active versus End-of-life. The releaseDate is 2025-03-05 versus 2016-10-29. The RX 9070 XT has a launchMsrp of 599 USD, which is stated once here for reference. The Pro 455 has no MSRP listed. The RX 9070 XT's base clock is 1660 MHz and boost clock is 2970 MHz, while the Pro 455 has no base or boost clocks listed.

FAQ

Q: Which GPU is faster in Geekbench OpenCL?

A: The AMD Radeon RX 9070 XT scores 17,428 compared to the Pro 455's 10,336, a 68.6% advantage.

Q: How large is the performance gap in Vulkan?

A: The RX 9070 XT scores 65,879 while the Pro 455 scores 12,240, making the RX 9070 XT 438.2% faster.

Q: What is the memory capacity difference?

A: The RX 9070 XT has 16 GB of GDDR6 memory, while the Pro 455 has 2 GB of GDDR5 memory.

Q: Does the RX 9070 XT support ray tracing?

A: Yes, it has 64 ray tracing cores. The Pro 455 has no ray tracing cores listed.

Q: Which GPU has a higher percentile ranking?

A: The RX 9070 XT ranks in the 55th percentile, while the Pro 455 ranks in the 52nd percentile.

Q: What is the TDP difference?

A: The RX 9070 XT has a TDP of 304 W, while the Pro 455 has a TDP of 35 W.

Where Each One Wins

The RX 9070 XT wins in every performance scenario. Its 48.66 TFLOPS FP32 compute and 16 GB memory make it ideal for 4K gaming, 3D rendering, and AI workloads. The 644.6 GB/s bandwidth ensures high-resolution textures load quickly. The PCIe 5.0 x16 interface provides ample bandwidth for data transfer. It is the clear winner for any desktop user seeking maximum performance.

The Pro 455 wins in portability and low-power scenarios. Its 35 W TDP and MXM Module form factor allow it to fit in laptops where the RX 9070 XT cannot. The None power connector requirement means it draws power directly from the motherboard, simplifying installation. Its Portable Device Dependent display outputs are designed for integrated laptop displays, not external monitors. The Pro 455 is the only choice for users of legacy 2016-era Mac laptops that require this specific MXM module.

The data shows the RX 9070 XT is a top-tier desktop GPU, while the Pro 455 is a niche mobile component. The RX 9070 XT's 2 benchmark wins versus the Pro 455's 0 are definitive, but the Pro 455's End-of-life status and 52nd percentile ranking make it a product for specific legacy systems, not general use. For modern workloads, the RX 9070 XT is the undisputed winner.