AMD Radeon PRO V620 vs NVIDIA RTX A5500 Comparison

The NVIDIA RTX A5500 and AMD Radeon PRO V620 are both end-of-life workstation GPUs, but the benchmark data shows a clear overall winner. The RTX A5500 leads in both available tests, with a 35.8% advantage in Geekbench OpenCL and a 7.9% lead in Geekbench Vulkan. The RTX A5500 also holds a higher average benchmark score of 165,217 compared to 136,472 for the Radeon PRO V620, placing it in the 97th percentile versus the 96th for its rival. However, the AMD card offers a larger 32 GB memory pool and a more efficient 7 nm process node, making the choice dependent on whether raw compute or memory capacity is the priority.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The NVIDIA RTX A5500 has an average benchmark score of 165,217, while the AMD Radeon PRO V620 scores 136,472. This places the RTX A5500 in the 97th percentile of all GPUs, compared to the 96th percentile for the AMD card.

Q: How large is the performance gap in Geekbench OpenCL?

A: The RTX A5500 scores 174,637 in Geekbench OpenCL, which is 35.8% higher than the Radeon PRO V620's 128,580. This is the largest single-test margin between the two cards.

Q: Does the AMD card win in any benchmark test?

A: No. The head-to-head data shows the RTX A5500 winning both Geekbench OpenCL and Geekbench Vulkan tests, with a 2-0 wins record. The AMD card's closest result is a 7.9% deficit in Vulkan.

Q: What is the difference in memory capacity?

A: The AMD Radeon PRO V620 features 32 GB of GDDR6 memory, while the NVIDIA RTX A5500 has 24 GB. However, the RTX A5500 has a wider 384-bit memory bus, yielding 768.0 GB/s of bandwidth versus 512.0 GB/s for the AMD card.

Q: Which GPU has a higher boost clock speed?

A: The AMD Radeon PRO V620 boosts to 2200 MHz, significantly higher than the RTX A5500's 1665 MHz boost. The AMD card also has a higher base clock at 1825 MHz versus 1080 MHz.

Q: What are the closest rivals for each card?

A: For the RTX A5500, the NVIDIA RTX 4500 Ada Generation is 0.5% ahead, while the AMD Radeon Pro W6900X is 2% ahead. For the Radeon PRO V620, the AMD Radeon Pro W6800X Duo is 0.5% ahead, and the NVIDIA RTX 4000 Ada Generation is 0.9% ahead.

Architecture Differences

The two GPUs come from fundamentally different architectural lineages. The NVIDIA RTX A5500 is built on the Ampere architecture, using the GA102 chip fabricated on an 8 nm Samsung process. This chip contains 28,300 million transistors on a 628 mm² die, resulting in a transistor density of 45.1M per mm². In contrast, the AMD Radeon PRO V620 uses the RDNA 2.0 architecture with the Navi 21 chip, manufactured by TSMC on a more advanced 7 nm process. The AMD chip packs 26,800 million transistors into a smaller 520 mm² die, achieving a higher density of 51.5M per mm².

The compute configuration diverges sharply. The RTX A5500 features 10,240 shading units, 320 texture mapping units (TMUs), and 96 raster output units (ROPs). It also includes 80 ray tracing cores and 320 tensor cores, the latter being absent from the AMD card entirely. The Radeon PRO V620 has just 4,608 shading units but compensates with 288 TMUs and 128 ROPs, plus 72 ray tracing cores. These differences manifest in the raw throughput numbers: the NVIDIA card delivers 34.10 TFLOPS of FP32 performance and 34.10 TFLOPS of FP16 (at a 1:1 ratio), while the AMD card offers 20.28 TFLOPS FP32 and 40.55 TFLOPS FP16 (at a 2:1 ratio).

Memory architectures are also distinct. The RTX A5500 uses a 384-bit memory bus with 24 GB of GDDR6, achieving 768.0 GB/s of bandwidth. The Radeon PRO V620 has a narrower 256-bit bus but doubles the capacity to 32 GB, yet its bandwidth drops to 512.0 GB/s. The physical design differs as well: the RTX A5500 is dual-slot with a single 8-pin power connector and a suggested 550 W PSU, whereas the Radeon PRO V620 is also dual-slot but requires two 8-pin connectors and a 700 W PSU. The AMD card is slightly taller and wider, measuring 120 mm by 50 mm compared to the NVIDIA's 112 mm height with no listed width.

Head-to-Head Benchmarks

The Geekbench OpenCL test delivers a decisive victory for the NVIDIA RTX A5500. With a score of 174,637 against the Radeon PRO V620's 128,580, the NVIDIA card is 35.8% faster. This is a substantial margin that reflects the RTX A5500's higher FP32 throughput (34.10 TFLOPS versus 20.28 TFLOPS) and significantly higher memory bandwidth (768.0 GB/s versus 512.0 GB/s). The OpenCL result aligns with the RTX A5500's average benchmark score of 165,217, which is 21% above the AMD card's 136,472.

The Geekbench Vulkan test is closer, but the RTX A5500 still wins with a 7.9% advantage, scoring 155,797 versus 144,364. This narrower margin suggests that the Radeon PRO V620's higher boost clock (2200 MHz) and superior pixel rate (281.6 GPixel/s versus 159.8 GPixel/s) help close the gap in API-specific workloads. Still, the NVIDIA card's 320 tensor cores and larger shader count provide enough compute headroom to maintain the lead. In both tests, the RTX A5500's nearest rivals include the NVIDIA RTX 4500 Ada Generation (0.5% ahead) and the AMD Radeon Pro W6900X (2% ahead), while the Radeon PRO V620's closest competitor is the AMD Radeon Pro W6800X Duo (0.5% ahead).

Specification Differences

The most striking difference is in memory capacity: the Radeon PRO V620 offers 32 GB, a full 8 GB more than the RTX A5500's 24 GB. However, the RTX A5500 counters with a 384-bit bus width versus 256-bit, giving it 768.0 GB/s of bandwidth compared to 512.0 GB/s. In raw compute, the RTX A5500 leads in FP32 with 34.10 TFLOPS against 20.28 TFLOPS, but the AMD card doubles its FP16 output to 40.55 TFLOPS while the NVIDIA card maintains a 1:1 ratio at 34.10 TFLOPS.

Clock speeds favor AMD dramatically: the Radeon PRO V620 has a base clock of 1825 MHz and a boost of 2200 MHz, while the RTX A5500 runs at 1080 MHz base and 1665 MHz boost. Despite lower clocks, the RTX A5500's larger shader count (10,240 versus 4,608) gives it higher texture rate (532.8 GTexel/s versus 633.6 GTexel/s for AMD) and pixel rate (159.8 GPixel/s versus 281.6 GPixel/s for AMD). Power requirements differ too: the RTX A5500 is rated at 230 W with a single 8-pin connector and 550 W suggested PSU, while the Radeon PRO V620 draws 300 W, needs two 8-pin connectors, and recommends a 700 W PSU.

Process technology is another divider: the RTX A5500 uses Samsung's 8 nm node, while the Radeon PRO V620 is built on TSMC's 7 nm process, giving AMD a smaller die (520 mm² versus 628 mm²) and higher transistor density (51.5M per mm² versus 45.1M per mm²). Display outputs are a major differentiator: the RTX A5500 has four DisplayPort 1.4a outputs, while the Radeon PRO V620 has no display outputs at all, indicating a compute-only focus. Both cards support PCIe 4.0 x16, DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4.

Where Each One Wins

The NVIDIA RTX A5500 wins decisively in compute-heavy workloads that leverage FP32 performance and memory bandwidth. Its 34.10 TFLOPS of FP32 throughput and 768.0 GB/s bandwidth make it the stronger choice for general-purpose GPU compute, scientific simulations, and rendering tasks that are not memory-capacity bound. The 35.8% lead in Geekbench OpenCL confirms this advantage in open-standard compute APIs. The RTX A5500's 320 tensor cores also provide dedicated hardware for AI and machine learning inference, a feature the Radeon PRO V620 lacks entirely. Its four DisplayPort outputs make it suitable for visualization workstations where multiple monitors are required.

The AMD Radeon PRO V620 wins in scenarios where memory capacity is the limiting factor. With 32 GB of VRAM, it can hold larger datasets, bigger textures, or more complex models in memory compared to the RTX A5500's 24 GB. This is critical for large-scale machine learning training, massive 3D scenes, or in-memory databases. The AMD card also has a higher pixel rate (281.6 GPixel/s versus 159.8 GPixel/s) and faster boost clock (2200 MHz), which could benefit certain rasterization-bound tasks. Its 2:1 FP16 ratio (40.55 TFLOPS) provides double the half-precision throughput of the NVIDIA card, an advantage for workloads that heavily utilize FP16 arithmetic. The 7 nm process also means better transistor density, potentially leading to better compute-per-watt in FP16 tasks.

The Verdict

The data strongly favors the NVIDIA RTX A5500 for most users. It wins both benchmark tests, holds a 21% higher average score (165,217 versus 136,472), and offers superior FP32 compute, memory bandwidth, and tensor core support. The 35.8% OpenCL margin is the kind of difference that translates directly into faster job completion times in compute environments. The RTX A5500 also consumes less power (230 W versus 300 W) and needs only a single 8-pin connector, simplifying deployment in existing workstations. Its display outputs make it more versatile for mixed compute-and-visualization roles.

The AMD Radeon PRO V620 is the pick only when memory capacity is non-negotiable. The 32 GB frame buffer is a 33% increase over the RTX A5500's 24 GB, which is decisive for workloads that exceed 24 GB of working set. The AMD card's higher FP16 throughput and faster clocks provide specific advantages in half-precision compute, but these are niche benefits. Its lack of display outputs limits it to headless compute servers, and its higher power draw (300 W with 700 W PSU recommendation) increases system requirements. The 7.9% Vulkan gap shows the AMD card is competitive in that API, but it still loses. Given the benchmark data, the RTX A5500 is the superior choice for general workstation compute, while the Radeon PRO V620 serves a narrow but real segment of memory-hungry workloads.