AMD Radeon RX 7900 GRE vs NVIDIA A2 Comparison

The data presents a stark contrast: the NVIDIA A2 is a low-power, single-slot accelerator designed for specific server-side tasks, while the AMD Radeon RX 7900 GRE is a high-throughput consumer graphics card. In the two shared benchmarks, the AMD card delivers decisively higher raw scores, yet the NVIDIA card holds a higher percentile ranking among all GPUs. This suggests the A2’s performance is more consistent with its niche, while the RX 7900 GRE’s strengths may not be fully captured by these particular tests.

The Verdict

Based strictly on the benchmark results, the AMD Radeon RX 7900 GRE is the clear performance winner. In the Geekbench OpenCL test, it scores 175,758 points compared to the NVIDIA A2’s 35,357 points, which translates to a 79.9% difference in favor of the AMD card. Similarly, in the Geekbench Vulkan test, the RX 7900 GRE scores 99,850 points versus the A2’s 34,023 points, a 65.9% margin. For any workload measured by these APIs, the RX 7900 GRE is vastly faster.

However, the choice is not simply about peak performance. The NVIDIA A2 is in the 79th percentile of all GPUs, while the RX 7900 GRE is in the 77th percentile. This slight discrepancy, despite the AMD card's benchmark dominance, implies that the A2's performance profile is more favorable when compared across the entire spectrum of GPUs. The A2’s 60 W TDP and single-slot design make it a unique asset for environments with severe power and space constraints, where the 260 W, dual-slot RX 7900 GRE would be unsuitable. Therefore, the RX 7900 GRE is for users prioritizing raw compute and rendering power, while the NVIDIA A2 is for those needing a low-profile, low-power accelerator for specific server tasks.

Architecture Differences

The two GPUs come from fundamentally different design philosophies. The NVIDIA A2 is built on the 8 nm process at Samsung, while the AMD Radeon RX 7900 GRE uses the 5 nm process at TSMC. This process difference is a major factor in their power and density characteristics. The AMD chip, codenamed Navi 31, packs 57,700 million transistors into a 529 mm² die, achieving a transistor density of 109.1 million per mm². The NVIDIA A2, using the GA107 chip, contains only 8,700 million transistors on a 200 mm² die, for a density of 43.5 million per mm². This makes the RX 7900 GRE a much more complex and densely packed chip.

Architecturally, the NVIDIA A2 uses the Ampere architecture, while the AMD card uses RDNA 3.0. The A2 is from the Workstation Ampere generation, whereas the RX 7900 GRE is part of the Radeon RX 7000 series. The A2 features 40 Tensor Cores and 10 RT Cores, while the RX 7900 GRE has a much larger number of compute units, reflected in its 5,120 shading units compared to the A2’s 1,280. The AMD card also has significantly more texture mapping units (320 vs 40) and ROPs (160 vs 32). While both support DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, their internal processing paths are entirely different. The A2's FP32 and FP16 performance is identical at 4.531 TFLOPS, suggesting a 1:1 ratio, while the RX 7900 GRE offers 45.98 TFLOPS FP32 and 91.96 TFLOPS FP16, indicating a 2:1 ratio.

Where Each One Wins

The benchmark wins are one-sided, but the architectural data points to distinct use cases. The AMD Radeon RX 7900 GRE wins in all head-to-head benchmarks, indicating superiority in general compute and graphics workloads. Its massive FP32 throughput of 45.98 TFLOPS and texture rate of 718.4 GTexel/s suggest it is built for high-resolution gaming and content creation. The NVIDIA A2, with its 60 W TDP and lack of display outputs, is clearly not intended for client-side graphics. Its 40 Tensor Cores are a hint that its purpose is in AI inference or other data-center tasks where its low power draw and small footprint are critical.

The RX 7900 GRE’s 576.0 GB/s of memory bandwidth over a 256-bit bus is more than double the A2’s 200.1 GB/s over a 128-bit bus, making it far better for memory-intensive applications. The A2, conversely, wins in the "efficiency" category by default, due to its significantly lower power requirements. The data shows the RX 7900 GRE is the winner for any task where raw performance is the primary goal. The A2’s advantage is not measured in benchmark scores but in its operational profile: it requires no power connectors and a suggested PSU of only 250 W, versus the RX 7900 GRE's 2x 8-pin connectors and 600 W suggested PSU.

FAQ

Q: Which GPU is faster in the Geekbench OpenCL benchmark?

A: The AMD Radeon RX 7900 GRE is significantly faster, scoring 175,758 points compared to the NVIDIA A2's 35,357 points, a difference of 79.9%.

Q: Does the NVIDIA A2 have any advantage in terms of physical size?

A: Yes, the NVIDIA A2 is a single-slot card with no power connectors and a 60 W TDP, while the AMD Radeon RX 7900 GRE is a dual-slot card requiring 2x 8-pin power connectors and a 260 W TDP.

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

A: The AMD Radeon RX 7900 GRE offers 576.0 GB/s of bandwidth over a 256-bit bus, while the NVIDIA A2 provides 200.1 GB/s over a 128-bit bus.

Q: Are these GPUs from the same architectural family?

A: No, the NVIDIA A2 uses the Ampere architecture, while the AMD Radeon RX 7900 GRE is based on RDNA 3.0.

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

A: The NVIDIA A2 is in the 79th percentile, which is slightly higher than the AMD Radeon RX 7900 GRE's 77th percentile, despite the latter's higher raw benchmark scores.

Q: How many Tensor Cores does the NVIDIA A2 have?

A: The NVIDIA A2 has 40 Tensor Cores, which are not present in the specifications for the AMD Radeon RX 7900 GRE.

Head-to-Head Benchmarks

The data offers two direct comparisons, and the AMD Radeon RX 7900 GRE dominates both. The most significant victory comes in the Geekbench OpenCL test. Here, the RX 7900 GRE scores 175,758, while the NVIDIA A2 manages only 35,357. This represents a 79.9% performance gap, meaning the AMD card delivers nearly five times the compute performance in this general-purpose API. This test is often a proxy for compute-heavy workloads like rendering or physics simulations, and the margin is immense.

The second shared test, Geekbench Vulkan, shows a similar but slightly less extreme outcome. The AMD Radeon RX 7900 GRE scores 99,850, compared to 34,023 for the NVIDIA A2. This is a 65.9% difference in favor of the AMD card. Vulkan is a low-level graphics API, and the RX 7900 GRE’s larger number of shading units and higher clock speeds are clearly the deciding factors. While the A2's score of 34,023 is respectable, it is far behind the AMD card's 99,850. These two results paint an unambiguous picture: in shared compute and graphics workloads, the RX 7900 GRE is in a different performance class entirely.

Specification Differences

The specification sheets reveal a gulf between the two products. The process node differs significantly: the NVIDIA A2 uses an 8 nm process from Samsung, while the AMD Radeon RX 7900 GRE is built on TSMC's 5 nm node. This leads to a massive difference in transistor count, with the AMD card featuring 57,700 million versus the A2's 8,700 million. The die size also differs, with the RX 7900 GRE at 529 mm² and the A2 at 200 mm². In terms of core configuration, the RX 7900 GRE has 5,120 shading units, 320 TMUs, and 160 ROPs, while the A2 has 1,280 shading units, 40 TMUs, and 32 ROPs. The AMD card also has 80 RT cores, compared to the A2's 10, and the A2's 40 Tensor Cores have no equivalent in the RX 7900 GRE's listed specs.

Memory configurations are also distinct. Both have 16 GB of GDDR6, but the RX 7900 GRE uses a 256-bit bus to achieve 576.0 GB/s bandwidth, whereas the A2 is limited to a 128-bit bus and 200.1 GB/s. Clock speeds differ, with the A2 having a base clock of 1440 MHz and boost of 1770 MHz, while the RX 7900 GRE has a lower base clock of 1287 MHz but a much higher boost clock of 2245 MHz. The power requirements are in stark opposition: the A2 has a 60 W TDP and no power connectors, while the RX 7900 GRE has a 260 W TDP and needs 2x 8-pin connectors. The A2 is also a single-slot card with no display outputs, while the RX 7900 GRE is a dual-slot card with HDMI 2.1a, DisplayPort 2.1, and USB Type-C outputs. Finally, the bus interface differs, with the A2 using PCIe 4.0 x8 and the RX 7900 GRE using PCIe 4.0 x16.