AMD Radeon Pro 575X vs NVIDIA RTX A6000 Comparison

Head-to-Head Benchmarks

The benchmark data presents a stark contrast between these two workstation GPUs, with the NVIDIA RTX A6000 dominating the shared test suite. The head-to-head comparison shows NVIDIA winning both common benchmarks, with no tests where the AMD Radeon Pro 575X comes out ahead.

In Geekbench OpenCL, the RTX A6000 scores 193,937 against the Radeon Pro 575X's 34,773. That is a 457.7% advantage for the NVIDIA card, representing a massive gap in raw compute throughput. This is not a marginal difference; the RTX A6000 delivers nearly five and a half times the OpenCL performance of the AMD part. The result aligns with the broader specification disparity between the two, but the sheer magnitude of the delta is striking.

The Vulkan results tell a similar story, though with a slightly smaller margin. The RTX A6000 posts 164,462 points, while the Radeon Pro 575X manages 37,919. The 333.7% delta still puts NVIDIA firmly in command, but the relative gap narrows compared to OpenCL. This suggests the AMD card's architectural limitations become more pronounced under compute-heavy workloads, while Vulkan's lower-level API access may allow it to utilize its hardware more efficiently relative to its own capabilities.

Looking at the average benchmark scores, the RTX A6000 holds a 44,075 average across its full test suite, versus 39,116 for the Radeon Pro 575X. That 12.7% gap in average score is far smaller than the head-to-head deltas, but the comparison is skewed by different test sets. The NVIDIA card runs a broader range of Passmark tests (DirectX 9, 10, 11, 12, G2D, G3D, and GPU compute) alongside Geekbench, while the AMD card only has three Geekbench entries. The NVIDIA card's Passmark G3D score of 22,577 and GPU compute score of 14,110 are notable, but without equivalent AMD data for those tests, the average comparison remains incomplete.

The percentile rankings offer another perspective. The RTX A6000 sits in the 84th percentile of all GPUs, while the Radeon Pro 575X is close behind at the 82nd percentile. This is surprising given the massive benchmark deltas. It implies that the AMD card, despite its much lower absolute performance, still outperforms a significant majority of graphics cards in the database. The RTX A6000's edge over its nearest rivals is razor-thin: it is 0.9% ahead of the GeForce RTX 4090 Mobile, 1.8% ahead of the Quadro M6000, and 1.9% ahead of the RTX 5050 Mobile, while trailing the RTX 4070 Ti by 1.6%. The Radeon Pro 575X shows a similar tight cluster, being 1.1% ahead of the Radeon Pro 580X and MX570 A, and 1.1% behind both the Radeon Pro 575 and RTX A500 Mobile.

FAQ

Q: How much faster is the NVIDIA RTX A6000 in OpenCL compared to the AMD Radeon Pro 575X?

A: The RTX A6000 scores 193,937 in Geekbench OpenCL versus 34,773 for the Radeon Pro 575X, a 457.7% advantage for NVIDIA.

Q: Does the AMD Radeon Pro 575X win any benchmark between the two?

A: No. In the head-to-head comparison, the RTX A6000 wins both Geekbench OpenCL and Geekbench Vulkan. The wins count stands at 2 for NVIDIA and 0 for AMD.

Q: What is the average benchmark score difference between these two cards?

A: The RTX A6000 has an average benchmark score of 44,075, while the Radeon Pro 575X averages 39,116. That puts NVIDIA about 12.7% higher on average, though the two cards run different benchmark suites.

Q: How do these cards rank against all other GPUs?

A: The RTX A6000 is in the 84th percentile of all GPUs, and the Radeon Pro 575X is in the 82nd percentile. Despite large benchmark differences, both cards sit in the upper tier of the database.

Q: Which card has a higher Vulkan score, and by how much?

A: The RTX A6000 scores 164,462 in Geekbench Vulkan, compared to 37,919 for the Radeon Pro 575X, giving NVIDIA a 333.7% lead.

Q: Are there any tests where the AMD card comes close to the NVIDIA card?

A: No. In the only shared tests, the RTX A6000 leads by at least 333.7% (Vulkan) and up to 457.7% (OpenCL). The AMD card's best relative performance is in Vulkan, but it still trails by a factor of more than four.

The Verdict

For any workload represented in the shared benchmarks, the NVIDIA RTX A6000 is the clear choice. The data shows it outperforming the AMD Radeon Pro 575X by margins of 333.7% to 457.7% in compute and graphics API tests. If your priority is raw performance in OpenCL or Vulkan, the RTX A6000 is categorically superior.

However, the Radeon Pro 575X is not without a place. Its 82nd percentile ranking indicates it outperforms the vast majority of GPUs in the database, and its average score of 39,116 is respectable. The card is positioned within 1.1% of several peers like the Radeon Pro 580X and the RTX A500 Mobile, suggesting it holds its own within its performance class. But in a direct comparison, the RTX A6000's 84th percentile ranking and higher average score make it the winner on every measurable axis.

The RTX A6000's nearest rivals are all high-end parts: the RTX 4090 Mobile, RTX 4070 Ti, and Quadro M6000. That places it in a performance tier where even small percentage deltas (0.9% to 1.9%) separate it from the competition. The Radeon Pro 575X, by contrast, competes with mid-range mobile and professional parts. The verdict is straightforward: choose the RTX A6000 for maximum performance, or the Radeon Pro 575X only if the workload fits within its much lower performance envelope and the system constraints demand it.

Specification Differences

The two cards differ on nearly every core specification. The RTX A6000 uses 48 GB of GDDR6 memory on a 384-bit bus, delivering 768.0 GB/s of bandwidth. The Radeon Pro 575X has 4 GB of GDDR5 on a 256-bit bus, with 217.0 GB/s. Memory capacity differs by a factor of twelve, and bandwidth by a factor of 3.5.

Clock speeds show the RTX A6000 with a 1410 MHz base and 1800 MHz boost, while the AMD card lists no base or boost clocks, only a memory clock of 1695 MHz (6.8 Gbps effective). The NVIDIA card's memory runs at 2000 MHz (16 Gbps effective), more than double the AMD's effective memory rate.

Shading units, texture mapping units, and render output units all favor NVIDIA heavily: 10,752 shaders versus 2,048, 336 TMUs versus 128, and 112 ROPs versus 32. The RTX A6000 also has 84 RT cores and 336 tensor cores, while the Radeon Pro 575X has none. Pixel and texture rates are 201.6 GPixel/s and 604.8 GTexel/s for NVIDIA, versus 35.07 GPixel/s and 140.3 GTexel/s for AMD.

Power and physical specifications diverge: the RTX A6000 has a 300 W TDP with an 8-pin EPS connector and a suggested 700 W PSU, while the Radeon Pro 575X has a 150 W TDP, no power connectors, and no suggested PSU. The NVIDIA card is dual-slot, 267 mm long and 112 mm tall, while the AMD card is an IGP (integrated graphics processor) with no listed dimensions. The bus interface differs: PCIe 4.0 x16 for NVIDIA versus PCIe 3.0 x16 for AMD. Display outputs are 4x DisplayPort 1.4a for NVIDIA, versus "Portable Device Dependent" for AMD.

Architecture Differences

The architectural gap is fundamental. The RTX A6000 is built on NVIDIA's Ampere architecture using the GA102 chip, fabricated on an 8 nm process at Samsung. It packs 28,300 million transistors on a 628 mm² die, yielding a transistor density of 45.1M per mm². The Radeon Pro 575X uses AMD's GCN 4.0 architecture with the Ellesmere chip, on a 14 nm process at GlobalFoundries. It has 5,700 million transistors on a 232 mm² die, for a density of 24.6M per mm². The NVIDIA chip has nearly five times the transistors on roughly 2.7 times the die area.

The RTX A6000 supports DirectX 12 Ultimate (12_2), while the Radeon Pro 575X supports DirectX 12 (12_0). Both support OpenGL 4.6, but Vulkan support differs: the NVIDIA card supports Vulkan 1.4, the AMD card Vulkan 1.3. The NVIDIA card includes dedicated ray tracing cores and tensor cores, features entirely absent from the AMD design. The AMD card's FP16 performance matches its FP32 at 4.489 TFLOPS (1:1), and the RTX A6000 also runs FP16 at 1:1 with FP32, reaching 38.71 TFLOPS.

The generation labels tell the story: the RTX A6000 belongs to "Workstation Ampere (Ax000)", while the Radeon Pro 575X is from "Radeon Pro Mac (500X Series)". The NVIDIA card replaced Quadro Turing and was succeeded by Workstation Ada. The AMD card has no listed predecessor or successor. Release dates differ by about 19 months, with the RTX A6000 launching in October 2020 and the Radeon Pro 575X in March 2019. Both are end-of-life products. The RTX A6000 has a launch MSRP of 4,649 USD; the AMD card has no listed MSRP.

Where Each One Wins

The NVIDIA RTX A6000 wins everywhere the data can measure. In OpenCL, it is 457.7% ahead. In Vulkan, it is 333.7% ahead. Its higher average benchmark score (44,075 vs 39,116) and percentile ranking (84th vs 82nd) reinforce this. Any application that leverages OpenCL or Vulkan will see dramatically better performance on the RTX A6000.

The Radeon Pro 575X's strengths are not visible in the benchmark data, but its specifications suggest where it might fit. As an IGP with no power connectors and a 150 W TDP, it is designed for portable or integrated systems where the RTX A6000's dual-slot size and 300 W power draw would be impractical. The AMD card has no display outputs of its own, being "Portable Device Dependent," which points to use in laptops or all-in-one systems.

The RTX A6000's features — ray tracing cores, tensor cores, 48 GB of memory, and PCIe 4.0 — make it suited for compute-heavy, memory-intensive, or AI-adjacent workloads. The Radeon Pro 575X, with its 4 GB of GDDR5 and GCN architecture, is better matched to legacy or lighter graphics tasks where the NVIDIA card's overhead would be wasted. The data does not show a single metric where the AMD card wins, but its existence as a low-power integrated solution gives it a niche the RTX A6000 cannot occupy due to physical and power constraints.