AMD Radeon RX 7800M vs NVIDIA RTX A4000 Comparison

The AMD Radeon RX 7800M and NVIDIA RTX A4000 are two professional-grade graphics solutions with divergent strengths, as evidenced by a head-to-head benchmark comparison that yields 4 wins for the AMD part and 6 for the NVIDIA part. The RX 7800M, built on TSMC's 5 nm process with RDNA 3.0 architecture, posts a higher average benchmark score of 27,883 compared to the A4000's 26,683, yet the NVIDIA card, fabricated on Samsung's 8 nm node with Ampere architecture, counters with superior performance in several legacy and compute-oriented tests. This analysis examines the benchmark data to determine where each card excels, who should choose which, and what architectural decisions drive these measurable differences.

Where Each One Wins

The AMD Radeon RX 7800M establishes clear dominance in modern DirectX 12 workloads. Its most decisive victory comes in the Passmark DirectX 12 test, where it scores 89 against the A4000's 72, a 23.6% advantage. The gap is similarly pronounced in 3DMark Steel Nomad DX12, with the RX 7800M posting 2,994 versus 2,604, a 15% lead. These results indicate that the RDNA 3.0 architecture is particularly well-optimized for contemporary graphics APIs that leverage asynchronous compute and mesh shaders. The RX 7800M also wins the Passmark DirectX 11 test with 176 against 158 (11.4% higher), suggesting strong performance across the most common gaming API. In Geekbench OpenCL, the AMD card scores 120,778, which is 14.2% ahead of the A4000's 105,739, demonstrating superior raw compute throughput for general-purpose workloads.

The NVIDIA RTX A4000, conversely, sweeps the remaining six benchmarks, with its largest margins appearing in older DirectX versions. Its most substantial win is in Passmark DirectX 9, where it scores 240 versus 174, a 27.5% advantage that reflects the Ampere architecture's strong legacy driver optimization. The A4000 also leads in Passmark DirectX 10 (126 versus 99, a 21.4% margin), which is notable for backward compatibility with older professional applications. In 2D performance, the NVIDIA card scores 1,024 in Passmark G2D against 892, a 12.9% lead that suggests better desktop compositing and video playback efficiency. The A4000 wins the overall Passmark G3D test with 19,459 versus 17,613 (9.5% higher), indicating that in aggregate 3D performance, the NVIDIA card holds an edge across the full test suite. The compute-oriented tests also favor NVIDIA: Passmark GPU Compute shows 9,760 versus 9,342 (4.3% higher), and Geekbench Vulkan shows 127,645 versus 126,668 (0.8% higher), a narrow but consistent margin.

The Verdict

Based strictly on the data, the choice between these two cards hinges on the workload mix. The AMD Radeon RX 7800M is the better pick for users running modern DirectX 12 applications, where its 23.6% and 15% leads over the A4000 in the respective tests translate to tangible frame rate improvements. The RX 7800M also offers superior OpenCL performance for compute-heavy tasks, with a 14.2% advantage that benefits scientific simulations and rendering pipelines. Its 73rd percentile ranking among all GPUs, compared to the A4000's 72nd, reflects this slight overall edge in average benchmark score.

The NVIDIA RTX A4000 is the better choice for users who rely on legacy DirectX 9 and DirectX 10 titles, where its 27.5% and 21.4% leads are decisive. The A4000's 9.5% win in Passmark G3D, the most comprehensive 3D benchmark in the suite, suggests that for mixed workloads spanning multiple API generations, the NVIDIA card delivers more consistent performance. Its 12.9% lead in 2D performance also makes it preferable for productivity tasks that involve high-resolution desktop rendering or video playback. For users prioritizing Vulkan performance, the A4000's 0.8% edge, while small, is nonetheless a win in a modern cross-platform API.

Head-to-Head Benchmarks

The largest single margin in the entire comparison belongs to the NVIDIA RTX A4000 in Passmark DirectX 9, where its score of 240 surpasses the RX 7800M's 174 by 27.5%. This is a substantial gap that indicates the Ampere architecture retains strong support for older DirectX feature levels, likely due to mature driver paths. The second-largest margin also favors NVIDIA: Passmark DirectX 10 shows the A4000 at 126 versus 99, a 21.4% difference. These two wins alone suggest that the A4000 is significantly better suited for legacy software environments common in industrial and enterprise settings.

On the AMD side, the most impressive victory is in Passmark DirectX 12, where the RX 7800M scores 89 against the A4000's 72, a 23.6% margin. This is particularly telling because DirectX 12 is the current standard for gaming and modern professional applications. The RX 7800M also excels in 3DMark Steel Nomad DX12, achieving 2,994 versus 2,604, a 15% lead that confirms its modern API advantage. In Geekbench OpenCL, the AMD card scores 120,778 versus 105,739, a 14.2% margin that highlights its superior raw compute throughput. The Passmark DirectX 11 result also favors AMD, with 176 versus 158 (11.4% higher), showing that the RDNA 3.0 architecture is competitive across the most widely used gaming API.

The remaining benchmarks show narrower margins. Geekbench Vulkan is almost a tie, with the A4000 winning 127,645 versus 126,668, a 0.8% difference. Passmark GPU Compute favors NVIDIA by 4.3%, with scores of 9,760 versus 9,342. Passmark G2D shows NVIDIA ahead by 12.9%, and Passmark G3D shows NVIDIA ahead by 9.5%. These results collectively paint a picture of two cards that are closely matched overall, but with distinct API-specific strengths that will determine which is superior for a given user.

FAQ

Q: Which card has a higher average benchmark score?

A: The AMD Radeon RX 7800M has an average benchmark score of 27,883, which is higher than the NVIDIA RTX A4000's average of 26,683. This places the RX 7800M at the 73rd percentile of all GPUs, while the A4000 sits at the 72nd percentile.

Q: What is the largest performance difference in any single benchmark?

A: The largest difference is in Passmark DirectX 9, where the NVIDIA RTX A4000 scores 240 against the AMD Radeon RX 7800M's 174, a 27.5% advantage. This is the most decisive win for either card in the entire comparison.

Q: How does the AMD card perform in DirectX 12 compared to NVIDIA?

A: The AMD Radeon RX 7800M wins both DirectX 12 tests. It scores 89 in Passmark DirectX 12 versus the A4000's 72, a 23.6% lead, and 2,994 in 3DMark Steel Nomad DX12 versus 2,604, a 15% lead.

Q: Which card has better Vulkan performance?

A: The NVIDIA RTX A4000 wins the Geekbench Vulkan test with a score of 127,645, compared to the AMD Radeon RX 7800M's 126,668. The margin is 0.8%, making this the closest benchmark in the entire comparison.

Q: What is the memory capacity difference between the two cards?

A: The NVIDIA RTX A4000 has 16 GB of GDDR6 memory on a 256-bit bus, while the AMD Radeon RX 7800M has 12 GB of GDDR6 memory on a 192-bit bus. Despite this difference, the memory bandwidth is similar: the A4000 achieves 448.0 GB/s, while the RX 7800M achieves 432.0 GB/s.

Q: Which card has more shading units and tensor cores?

A: The NVIDIA RTX A4000 has 6,144 shading units and 192 tensor cores, while the AMD Radeon RX 7800M has 3,840 shading units and no tensor cores. However, the RX 7800M has 60 ray tracing cores compared to the A4000's 48.

Architecture Differences

The AMD Radeon RX 7800M is built on the RDNA 3.0 architecture, which AMD designates with the codename "Wheat Nas" and places in the Navi Mobile (RX 7000M) generation. It uses the Navi 32 chip fabricated on TSMC's 5 nm process, containing 28,100 million transistors on a 346 mm² die, yielding a transistor density of 81.2M per mm². The NVIDIA RTX A4000, conversely, uses the Ampere architecture with the GA104 chip, fabricated on Samsung's 8 nm process. It contains 17,400 million transistors on a larger 392 mm² die, resulting in a lower transistor density of 44.4M per mm². These process and density differences explain why the AMD card achieves substantially higher clock speeds, with a base of 1295 MHz and boost of 2335 MHz, compared to the A4000's 735 MHz base and 1560 MHz boost.

The compute resource allocation differs significantly between the two architectures. The RX 7800M has 3,840 shading units, 240 texture mapping units, and 96 render output units, while the A4000 has 6,144 shading units, 192 texture mapping units, and 96 render output units. The AMD card also features 60 ray tracing cores, whereas the NVIDIA card has 48 ray tracing cores but compensates with 192 tensor cores, which the RX 7800M lacks entirely. This explains why the RX 7800M achieves higher pixel and texture rates (224.2 GPixel/s and 560.4 GTexel/s, respectively) compared to the A4000's 149.8 GPixel/s and 299.5 GTexel/s. The FP32 compute throughput tells a similar story, with the RX 7800M delivering 35.87 TFLOPS versus the A4000's 19.17 TFLOPS, though the A4000's tensor cores provide specialized AI acceleration capabilities that the AMD card cannot match.

Specification Differences

The two cards differ across several key specification categories. The AMD Radeon RX 7800M has a memory configuration of 12 GB GDDR6 on a 192-bit bus with 432.0 GB/s bandwidth, while the NVIDIA RTX A4000 has 16 GB GDDR6 on a 256-bit bus with 448.0 GB/s bandwidth. Clock speeds are dramatically different, with the RX 7800M running at 1295 MHz base and 2335 MHz boost, while the A4000 runs at 735 MHz base and 1560 MHz boost. The power profiles also diverge, with the RX 7800M rated at 180 W TDP and described as an integrated GPU (IGP) with no power connectors, whereas the A4000 is rated at 140 W TDP, requires a single 6-pin power connector, and has a suggested PSU of 300 W. The A4000 is a single-slot card measuring 241 mm in length and 112 mm in height, with four DisplayPort 1.4a outputs, while the RX 7800M's display outputs are described as "Portable Device Dependent," reflecting its mobile-oriented design. The production status also differs, with the RX 7800M listed as Active and released on September 10, 2024, while the A4000 is End-of-life with a release date of April 11, 2021, and a successor in the Workstation Ada line. Both cards support PCIe 4.0 x16 and share identical API support for DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The RX 7800M's predecessor is listed as Polaris Mobile, while the A4000's predecessor is Quadro Turing.