AMD Radeon Pro 575X vs AMD Radeon RX 7900 GRE Comparison

Head-to-Head Benchmarks

The recorded data contains two direct comparisons between the AMD Radeon Pro 575X and the AMD Radeon RX 7900 GRE. Both are compute-oriented tests, and the RX 7900 GRE wins both by a substantial margin. The most striking result is in Geekbench OpenCL, where the RX 7900 GRE scores 175,758 against the Pro 575X's 34,773. That is a delta of -80.2% from the perspective of the older card, meaning the RX 7900 GRE delivers roughly five times the raw compute throughput in that workload. Such a gap is not incremental; it represents a generational leap in parallel processing capability.

The second head-to-head benchmark, Geekbench Vulkan, shows the RX 7900 GRE scoring 99,850 while the Pro 575X manages 37,919. The delta here is -62%, which again places the Radeon RX 7900 GRE far ahead. Vulkan is a low-level API that rewards both driver optimization and architectural efficiency, and the data suggests the RDNA 3.0 design has a significant advantage over the older GCN 4.0 part in this scenario. For any workload that leverages Vulkan, the RX 7900 GRE is the clear choice based on these measurements.

It is worth remembering the Pro 575X does not have any benchmark win against the RX 7900 GRE in the direct comparison set. The win tally stands at 0 for the Pro 575X and 2 for the RX 7900 GRE. The average benchmark score in the database tells a similar story: the Pro 575X averages 39,116 across its recorded tests, while the RX 7900 GRE averages 32,456. That average is pulled down by the RX 7900 GRE's inclusion of several Passmark tests with lower scores, but the head-to-head compute results are unambiguous. When the same test is run on both cards, the RX 7900 GRE dominates.

The Pro 575X does hold its own in the broader context of its own generation. Its nearest rivals include the AMD Radeon Pro 580X, which scores 38,706 (1.1% higher), and the AMD Radeon Pro 575, which scores 39,555 (1.1% higher than the Pro 575X). The Pro 575X also sits close to the NVIDIA GeForce MX570 A and NVIDIA RTX A500 Mobile, with deltas of 1.1% and -1.1% respectively. This indicates that the Pro 575X was a solid mid-range performer in its time, but it is competing in a different league compared to the RX 7900 GRE. The RX 7900 GRE's nearest rivals, by contrast, include the AMD FirePro S10000 and AMD FirePro S9300 X2, with deltas of 0.2% and -0.3%, showing that its average score is tightly clustered with other high-end workstation parts.

The Verdict

The data points to a straightforward conclusion: the AMD Radeon RX 7900 GRE is the superior card for compute-intensive tasks. Its Geekbench OpenCL score is 141,000 points higher than the Pro 575X's, and its Vulkan score is nearly 62,000 points higher. If the workload involves OpenCL or Vulkan, the RX 7900 GRE is the only rational choice from these two. The Pro 575X cannot compete in raw throughput, and the benchmark deltas are too large to be overcome by driver tweaks or system tuning.

The AMD Radeon Pro 575X, however, is not without a niche. Its percentile ranking against all GPUs is 82, which is higher than the RX 7900 GRE's percentile of 77. This is an interesting anomaly. The percentile reflects the average benchmark score relative to the entire database, and the Pro 575X's average of 39,116 places it in the 82nd percentile, while the RX 7900 GRE's average of 32,456 places it in the 77th. This suggests that the Pro 575X has a more consistent profile across the tests in the database, whereas the RX 7900 GRE's average is dragged down by specific low-scoring tests like Passmark DirectX 10 and DirectX 12.

For a user who specifically needs a card that performs well across a wide range of legacy and modern benchmarks without a single weak point, the Pro 575X might look appealing on paper. But that is a misleading takeaway. The head-to-head tests are the only true apples-to-apples comparisons, and they show a massive gap. The RX 7900 GRE's low Passmark scores are likely due to specific test conditions, not a general weakness. The practical advice is simple: if you are choosing between these two for any modern workload, pick the RX 7900 GRE. If you are constrained to a platform that only supports the Pro 575X (such as a specific Mac chassis), then the data still shows it is a capable card for its era, but it is not a competitor to the RX 7900 GRE.

FAQ

Q: Which card wins in Geekbench OpenCL?

A: The AMD Radeon RX 7900 GRE wins decisively with a score of 175,758 versus the AMD Radeon Pro 575X's 34,773, a delta of -80.2% for the older card.

Q: How big is the Vulkan performance gap?

A: The RX 7900 GRE scores 99,850 in Geekbench Vulkan, while the Pro 575X scores 37,919. That is a -62% delta, meaning the RX 7900 GRE is roughly 2.6 times faster in this test.

Q: Does the Pro 575X win any head-to-head benchmark?

A: No. The recorded head-to-head set shows 0 wins for the Pro 575X and 2 wins for the RX 7900 GRE.

Q: Why does the Pro 575X have a higher percentile rank?

A: The Pro 575X has an 82nd percentile rank versus the RX 7900 GRE's 77th. This is based on the average benchmark score, where the Pro 575X averages 39,116 and the RX 7900 GRE averages 32,456. The RX 7900 GRE's average is reduced by several lower-scoring Passmark tests.

Q: What is the average benchmark score for each card?

A: The Pro 575X averages 39,116, while the RX 7900 GRE averages 32,456 across all recorded tests in the database.

Q: Which card has better nearest-rival consistency?

A: The Pro 575X sits within 1.1% of its closest rivals (Pro 580X, MX570 A, Pro 575, RTX A500 Mobile). The RX 7900 GRE is within 0.4% of its closest rivals (FirePro S10000, FirePro S9300 X2, RX 590 GME, Pro 570X). Both are tightly clustered, but the RX 7900 GRE's cluster is at a much higher absolute performance level.

Specification Differences

The two cards differ across nearly every core specification. Memory capacity is a major divider: the Pro 575X has 4 GB of GDDR5, while the RX 7900 GRE offers 16 GB of GDDR6. Both use a 256-bit memory bus, but the bandwidth tells the real story. The Pro 575X delivers 217.0 GB/s, while the RX 7900 GRE reaches 576.0 GB/s. That is more than 2.5 times the memory bandwidth, which directly benefits high-resolution textures and large compute datasets.

The memory clock also differs significantly. The Pro 575X runs at 1695 MHz (6.8 Gbps effective), while the RX 7900 GRE runs at 2250 MHz (18 Gbps effective). The RX 7900 GRE also has explicit clock speeds for base, boost, and game modes: 1287 MHz base, 2245 MHz boost, and 1880 MHz game clock. The Pro 575X lists no base or boost clock in the database.

Shading resources are heavily skewed toward the RX 7900 GRE. It has 5120 shading units, 320 texture mapping units, and 160 render output units. The Pro 575X has 2048 shading units, 128 TMUs, and 32 ROPs. The RX 7900 GRE also has 80 ray tracing cores, a feature completely absent from the Pro 575X. The pixel rate is 359.2 GPixel/s for the RX 7900 GRE versus 35.07 GPixel/s for the Pro 575X. Texture rate is 718.4 GTexel/s versus 140.3 GTexel/s. Floating point performance is 45.98 TFLOPS (FP32) for the RX 7900 GRE versus 4.489 TFLOPS for the Pro 575X. The RX 7900 GRE also supports FP16 at 91.96 TFLOPS (2:1 ratio), while the Pro 575X is capped at 4.489 TFLOPS (1:1 ratio).

Power and physical specifications differ as well. The Pro 575X has a TDP of 150 W, no power connectors, and is listed as an IGP with a slot width of "IGP." The RX 7900 GRE has a TDP of 260 W, requires 2x 8-pin power connectors, suggests a 600 W PSU, and is a dual-slot card. The RX 7900 GRE measures 276 mm in length, 110 mm in height, and 51 mm in width. The Pro 575X has no recorded dimensions. The bus interface also differs: PCIe 3.0 x16 for the Pro 575X versus PCIe 4.0 x16 for the RX 7900 GRE.

Architecture Differences

The architectural gap is generational. The Pro 575X uses the Ellesmere chip based on GCN 4.0, built on a 14 nm process at GlobalFoundries. It packs 5,700 million transistors on a 232 mm² die, giving a transistor density of 24.6 million per mm². The RX 7900 GRE uses the Navi 31 chip with the codename "Plum Bonito," based on RDNA 3.0, built on a 5 nm process at TSMC. It contains 57,700 million transistors on a 529 mm² die, achieving a density of 109.1 million per mm². That is over four times the transistor density.

The RX 7900 GRE is part of the Navi III (RX 7000) generation, with a predecessor in Navi II and a successor in Navi IV. The Pro 575X belongs to the Radeon Pro Mac (500X Series) generation and is marked as end-of-life, while the RX 7900 GRE is listed as active production. The RX 7900 GRE supports DirectX 12 Ultimate (12_2), while the Pro 575X only reaches DirectX 12 (12_0). Vulkan support is also newer on the RX 7900 GRE, at version 1.4 versus 1.3. Both cards support OpenGL 4.6.

The RX 7900 GRE includes 80 ray tracing cores, which is a fundamental architectural addition that the GCN 4.0 architecture lacks entirely. This means the RX 7900 GRE can handle hardware-accelerated ray tracing, while the Pro 575X cannot. The display outputs also differ: the Pro 575X is listed as "Portable Device Dependent," while the RX 7900 GRE offers 1x HDMI 2.1a, 2x DisplayPort 2.1, and 1x USB Type-C. The release dates are far apart: March 2019 for the Pro 575X and July 2023 for the RX 7900 GRE.

Where Each One Wins

The AMD Radeon RX 7900 GRE wins in every direct comparison available. For OpenCL compute workloads, it is the only choice. For Vulkan-based applications, it is similarly dominant. The RX 7900 GRE is the card for anyone running modern compute tasks, machine learning inference, or graphics workloads that benefit from 16 GB of GDDR6 memory and 576 GB/s of bandwidth. Its 80 ray tracing cores also make it suitable for ray-traced rendering, a task the Pro 575X cannot attempt in hardware.

The AMD Radeon Pro 575X has no benchmark win in the head-to-head set, but its strength lies in its profile. With an 82nd percentile rank and an average score of 39,116, it is a consistent performer across the database. Its nearest rivals are all within 1.1%, indicating that it was well-tuned for its generation. For a legacy system that requires a GCN 4.0 card with 4 GB of GDDR5 memory and a 150 W TDP, the Pro 575X remains a functional option. It is also importantly the Pro 575X has no power connectors, which makes it suitable for systems without dedicated GPU power delivery.

The practical split is clear: the RX 7900 GRE for anything modern, compute-heavy, or ray-traced; the Pro 575X for legacy compatibility or systems where an IGP form factor is mandatory. The data does not support any scenario where the Pro 575X outperforms the RX 7900 GRE in a shared workload. The RX 7900 GRE's launch MSRP is 549 USD, which is a single data point for reference, but the performance gap justifies the difference in class.