AMD Radeon Pro 555X vs AMD Radeon RX 7600M XT Comparison

The AMD Radeon Pro 555X and the AMD Radeon RX 7600M XT represent two entirely different eras of mobile graphics, and the benchmark data reflects a generational chasm rather than a close contest. The Pro 555X is a legacy GCN 4.0 part from a 2018 Mac-focused lineup, while the RX 7600M XT is a current RDNA 3.0 mobile solution. In the two directly comparable benchmark tests, the RX 7600M XT wins decisively, but the story is more nuanced when you look at their overall standing among all GPUs, where the older card actually holds a slightly higher percentile rank.

Head-to-Head Benchmarks

The direct comparison between these two GPUs is limited to two synthetic tests: Geekbench OpenCL and Geekbench Vulkan. In both, the AMD Radeon RX 7600M XT delivers a crushing victory. The most dramatic margin comes in the OpenCL test, where the RX 7600M XT scores 74,869 points against the Pro 555X’s 12,628 points. That is a delta of -83.1% from the winner’s perspective, meaning the newer card is roughly 5.9 times faster in raw compute throughput. This is not a marginal improvement; it is a complete wipeout that reflects the massive architectural and process node advantages held by RDNA 3.0 over GCN 4.0.

The Vulkan test tells a similar but slightly less lopsided story. Here, the RX 7600M XT scores 27,793 points, while the Pro 555X manages 12,855 points. The delta is -53.7%, which translates to the RX 7600M XT being about 2.2 times faster. While still a dominant win, the smaller gap in Vulkan suggests that the older GCN architecture handles this API relatively better than it does OpenCL, likely due to driver optimizations or the specific workload characteristics of the test. Still, the result is unambiguous: the RX 7600M XT is the clear winner in every head-to-head metric available.

However, the aggregate benchmark picture is curious. The Pro 555X has an average benchmark score of 13,321 across its three tests (Geekbench Metal, OpenCL, and Vulkan), placing it in the 54th percentile of all GPUs. The RX 7600M XT, despite its massive wins in the shared tests, has a lower average score of 12,710 and sits in the 52nd percentile. This is because the RX 7600M XT’s average is dragged down by several PassMark tests where it scores poorly in absolute terms (e.g., 58 in DirectX 12, 76 in DirectX 10), even though its Geekbench scores are stellar. The Pro 555X’s nearest rivals include the NVIDIA GeForce GTX 480 (0.2% ahead) and the AMD FirePro M6100 (0.2% behind), showing it is a solid mid-pack performer for its era. The RX 7600M XT’s rivals include the NVIDIA GeForce GTX 670 (0.5% ahead) and the AMD Radeon Pro 455 (0.9% behind), indicating it competes with older high-end desktop parts despite its modern architecture.

The Verdict

From the data, the choice is stark for anyone prioritizing raw performance. The AMD Radeon RX 7600M XT is the definitive pick for compute-heavy tasks, gaming, or any workload that leverages modern APIs. Its OpenCL score is 493% higher than the Pro 555X, and its Vulkan score is 116% higher. If you are comparing these two for a new purchase or an upgrade, the RX 7600M XT is the only sensible option based on benchmarks alone.

The AMD Radeon Pro 555X, however, is not without its niche. Its higher percentile rank (54th vs. 52nd) and better average score suggest it delivers more consistent performance across a broader range of legacy tests. It also has a notably lower TDP of 75 W compared to the RX 7600M XT’s 120 W, which could matter in thermally constrained systems. For users stuck with a 2018-era Mac laptop that has this GPU, the data shows it is still a serviceable part for basic tasks, but it should not be considered for modern, demanding workloads. The verdict is simple: the RX 7600M XT wins on every shared benchmark, and the Pro 555X only wins on the basis of aggregate consistency and power efficiency.

Architecture Differences

The architectural gap between these two GPUs is enormous and explains the benchmark results. The Pro 555X is built on GCN 4.0, using the Polaris 21 chip on a 14 nm process from GlobalFoundries. It packs 3,000 million transistors into a 123 mm² die, giving it a transistor density of 24.4 million per square millimeter. In contrast, the RX 7600M XT uses the RDNA 3.0 architecture with the Navi 33 chip, fabricated by TSMC on a 6 nm process. This chip contains 13,300 million transistors on a 204 mm² die, achieving a density of 65.2 million per square millimeter. The newer process node allows for over four times the transistor count in less than double the die area, which is the primary driver of the performance gap.

The compute resources differ dramatically. The Pro 555X has 768 shading units, 48 texture mapping units (TMUs), and 16 raster output units (ROPs). The RX 7600M XT has 2,048 shading units, 128 TMUs, and 64 ROPs — roughly 2.7x, 2.7x, and 4x the counts, respectively. Additionally, the RX 7600M XT introduces 32 ray tracing cores, a feature entirely absent from the older GCN part. The FP32 throughput tells the tale: the Pro 555X delivers 1,393.2 GFLOPS, while the RX 7600M XT delivers 20.23 TFLOPS — a 14.5x increase. The RX 7600M XT also supports FP16 at a 2:1 rate (40.45 TFLOPS), whereas the Pro 555X does FP16 at a 1:1 rate (1,393.2 GFLOPS), meaning the new card can accelerate half-precision workloads far more effectively.

Specification Differences

The most obvious specification difference is memory. The Pro 555X comes with 4 GB of GDDR5 on a 128-bit bus, delivering 94.08 GB/s of bandwidth. The RX 7600M XT doubles the capacity to 8 GB of GDDR6 on the same 128-bit bus, but with a much higher effective speed of 18 Gbps, achieving 288.0 GB/s of bandwidth — over three times the bandwidth of the older card. This alone makes the RX 7600M XT far more capable in texture-heavy or high-resolution scenarios.

Clock speeds also differ substantially. The Pro 555X has no listed base or boost clock, only a memory clock of 1470 MHz (5.9 Gbps effective). The RX 7600M XT has a base clock of 1280 MHz, a game clock of 2023 MHz, and a boost clock of 2469 MHz, alongside a memory clock of 2250 MHz (18 Gbps effective). The power envelope differs as well: the Pro 555X is rated at 75 W TDP, while the RX 7600M XT is rated at 120 W. Both are listed as IGP (integrated) slot width with no power connectors, but the newer card requires a higher power budget. The bus interface also advances from PCIe 3.0 x8 on the Pro 555X to PCIe 4.0 x16 on the RX 7600M XT, doubling the available bandwidth to the host system. In terms of API support, the Pro 555X supports DirectX 12 (12_0), OpenGL 4.6, and Vulkan 1.3, while the RX 7600M XT supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4 — the newer card adds ray tracing and mesh shader support through DirectX 12 Ultimate.

FAQ

Q: Which GPU is faster in Geekbench OpenCL?

A: The AMD Radeon RX 7600M XT is dramatically faster, scoring 74,869 versus 12,628 for the AMD Radeon Pro 555X, a delta of -83.1% in favor of the newer card.

Q: Does the AMD Radeon Pro 555X have ray tracing cores?

A: No, the Pro 555X has no ray tracing cores. The AMD Radeon RX 7600M XT includes 32 ray tracing cores.

Q: What is the memory bandwidth difference between the two?

A: The AMD Radeon RX 7600M XT offers 288.0 GB/s of bandwidth with 8 GB of GDDR6, while the AMD Radeon Pro 555X offers 94.08 GB/s with 4 GB of GDDR5. The newer card has roughly 3.1x the bandwidth.

Q: Which GPU has a higher percentile ranking among all GPUs?

A: The AMD Radeon Pro 555X ranks in the 54th percentile, while the AMD Radeon RX 7600M XT ranks in the 52nd percentile, despite the latter being much faster in direct comparisons.

Q: What are the TDP ratings for each GPU?

A: The AMD Radeon Pro 555X has a TDP of 75 W, while the AMD Radeon RX 7600M XT has a TDP of 120 W.

Q: What DirectX versions do they support?

A: The AMD Radeon Pro 555X supports DirectX 12 (12_0), while the AMD Radeon RX 7600M XT supports DirectX 12 Ultimate (12_2), which includes additional features like ray tracing.

Where Each One Wins

The AMD Radeon RX 7600M XT wins in every scenario that demands raw performance. Its OpenCL score of 74,869 is a clear indicator for compute-heavy applications like rendering, machine learning inference, or video encoding. Its Vulkan score of 27,793 makes it the better choice for modern gaming titles that leverage Vulkan. The 8 GB GDDR6 memory with 288.0 GB/s bandwidth ensures it can handle high-resolution textures and larger datasets without bottlenecking. The presence of ray tracing cores and DirectX 12 Ultimate support means it is future-proof for upcoming game titles that adopt these features. The RX 7600M XT is also the winner for users who want a single GPU that can handle both gaming and professional compute workloads, given its massive FP32 throughput of 20.23 TFLOPS.

The AMD Radeon Pro 555X wins in a narrower set of circumstances. Its lower 75 W TDP makes it a better fit for ultra-thin laptops or systems where power draw and thermal output are critical constraints. Its higher percentile rank (54th vs. 52nd) and better average score (13,321 vs. 12,710) suggest it provides more consistent performance across a variety of older or less demanding applications, including those that rely on Metal (where it scores 14,479). For users running legacy software that is optimized for GCN architecture or that does not benefit from the newer features, the Pro 555X may offer a smoother experience relative to its modest power envelope. However, this is a niche advantage; the data overwhelmingly favors the RX 7600M XT for any modern workload where performance is the priority.