AMD Radeon PRO V620 vs NVIDIA RTX A4500 Mobile Comparison

FAQ

Q: How do the two GPUs compare in overall average benchmark score?

A: The AMD Radeon PRO V620 records an average benchmark score of 136472, while the NVIDIA RTX A4500 Mobile scores 91134. The AMD part sits in the 96th percentile of all GPUs in the database, whereas the NVIDIA part sits in the 93rd percentile.

Q: Which GPU wins in Geekbench OpenCL and by how much?

A: The AMD Radeon PRO V620 wins the OpenCL test with a score of 128580 versus 105307 for the NVIDIA RTX A4500 Mobile, a delta of 22.1%.

Q: What is the margin in the Vulkan benchmark?

A: The AMD Radeon PRO V620 scores 144364 in Vulkan, which is 87.6% ahead of the NVIDIA RTX A4500 Mobile's 76960. This is the largest single-test gap in the comparison.

Q: How does the memory configuration differ between the two cards?

A: The AMD Radeon PRO V620 has 32 GB of GDDR6 on a 256-bit bus, while the NVIDIA RTX A4500 Mobile has 16 GB of GDDR6 on the same 256-bit bus. Both achieve 512.0 GB/s of bandwidth and use 16 Gbps effective memory speed.

Q: What are the power requirements for each card?

A: The AMD Radeon PRO V620 has a 300 W TDP, uses dual-slot cooling, requires two 8-pin power connectors, and calls for a 700 W PSU. The NVIDIA RTX A4500 Mobile has a 140 W TDP, uses no external power connectors, and has no suggested PSU listed in the database.

Q: Which GPU has the higher transistor count and die size?

A: The AMD Radeon PRO V620 uses 26,800 million transistors on a 520 mm² die, while the NVIDIA RTX A4500 Mobile uses 17,400 million transistors on a 392 mm² die. The AMD chip is built on a 7 nm process from TSMC, the NVIDIA chip on an 8 nm process from Samsung.

Architecture Differences

The AMD Radeon PRO V620 is built on the Navi 21 chip using RDNA 2.0 architecture, fabricated on TSMC's 7 nm process. The NVIDIA RTX A4500 Mobile uses the GA104 chip with Ampere architecture, fabricated on Samsung's 8 nm process. This process difference is part of why the AMD chip packs 26,800 million transistors into a 520 mm² die, a transistor density of 51.5M per mm², versus 17,400 million transistors on a 392 mm² die for NVIDIA at 44.4M per mm².

The compute layouts are fundamentally different. AMD's chip has 4608 shading units, 288 texture mapping units, and 128 ROPs. NVIDIA's chip has more shading units at 5888, but fewer texture units at 184 and fewer ROPs at 96. Ray tracing hardware also differs: AMD includes 72 ray tracing cores, while NVIDIA includes 46 RT cores plus 184 tensor cores, a feature AMD does not implement in this part. The FP16 situation is notable: AMD claims 40.55 TFLOPS FP16 via a 2:1 ratio from its FP32 rate, while NVIDIA runs FP16 at a 1:1 ratio, matching its FP32 output at 17.66 TFLOPS.

Both cards support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, and both use a PCIe 4.0 x16 bus interface. The AMD card has no display outputs at all, meaning it is a compute-only accelerator, while the NVIDIA mobile part's display outputs are listed as "Portable Device Dependent," indicating it is designed for laptop integration where outputs are handled by the system. The NVIDIA card also has no dimensions recorded, no slot width, and no power connectors, consistent with a mobile BGA design, whereas the AMD card is a 267 mm dual-slot board with two 8-pin connectors.

The production status for both is end-of-life. The AMD card released on 2021-11-03 and its predecessor is listed as Radeon Pro Vega. The NVIDIA card released on 2022-03-21, its predecessor is Quadro Turing-M, and its successor is Ada-MW.

Where Each One Wins

The AMD Radeon PRO V620 wins both recorded benchmark tests, so the use-case split is straightforward. In OpenCL, which is a common general-purpose compute workload, the AMD card leads by 22.1%. In Vulkan, which stresses graphics and compute through a modern low-level API, the AMD card leads by 87.6%. That Vulkan margin is enormous and suggests the AMD architecture has a particular strength in this API, possibly tied to its higher pixel throughput and texture throughput.

The NVIDIA RTX A4500 Mobile does have a mobile form factor advantage. It is a 140 W part with no external power connectors and no recorded dimensions, indicating it is meant to be integrated into laptops. The AMD card, despite being from the Radeon PRO line, is a 300 W dual-slot desktop board with a 267 mm length. So for users who need a workstation GPU in a portable chassis, the NVIDIA part is the only one that fits that physical category, and its 16 GB memory capacity is still substantial for mobile work.

However, for raw compute throughput in a fixed workstation, the data strongly favors AMD. The Radeon PRO V620 has higher FP32 at 20.28 TFLOPS versus 17.66 TFLOPS, higher pixel rate at 281.6 GPixel/s versus 144.0 GPixel/s, and higher texture rate at 633.6 GTexel/s versus 276.0 GTexel/s. It also has double the memory capacity at 32 GB versus 16 GB, which matters for large datasets that must stay resident in VRAM.

The NVIDIA part does have 184 tensor cores, which the AMD part lacks entirely. That means the NVIDIA GPU has dedicated hardware for tensor-based workloads, although the benchmark data in the database does not include a test that isolates tensor performance. The recorded OpenCL and Vulkan results do not reflect any tensor advantage, so the only concrete evidence of a win for NVIDIA is the presence of that hardware and its lower power envelope.

Specification Differences

The two GPUs differ across nearly every major specification category. The AMD Radeon PRO V620 uses the Navi 21 chip with RDNA 2.0 architecture on a 7 nm TSMC process, while the NVIDIA RTX A4500 Mobile uses GA104 with Ampere architecture on an 8 nm Samsung process. Transistor counts are 26,800 million versus 17,400 million, and die sizes are 520 mm² versus 392 mm².

Clock speeds differ substantially. AMD runs a base clock of 1825 MHz and a boost of 2200 MHz. NVIDIA runs much lower clocks: 930 MHz base and 1500 MHz boost. Both use 2000 MHz memory with 16 Gbps effective speed, so the memory clocks are identical. Memory capacity differs: 32 GB for AMD versus 16 GB for NVIDIA, both GDDR6 on a 256-bit bus, both yielding 512.0 GB/s bandwidth.

Compute unit counts diverge: AMD has 4608 shaders, 288 TMUs, 128 ROPs, and 72 RT cores. NVIDIA has 5888 shaders, 184 TMUs, 96 ROPs, 46 RT cores, and 184 tensor cores. The resulting throughput figures favor AMD: pixel rate 281.6 GPixel/s versus 144.0 GPixel/s, texture rate 633.6 GTexel/s versus 276.0 GTexel/s, FP32 20.28 TFLOPS versus 17.66 TFLOPS, and FP16 40.55 TFLOPS versus 17.66 TFLOPS.

Power and physical design are opposites. AMD is a 300 W dual-slot card, 267 mm long, 120 mm tall, 50 mm wide, with two 8-pin connectors and a 700 W suggested PSU. NVIDIA is a 140 W mobile part with no power connectors, no suggested PSU, and no dimensions recorded. Display outputs are absent on the AMD card, while the NVIDIA card lists "Portable Device Dependent" outputs. Both are end-of-life products, with AMD releasing on 2021-11-03 and NVIDIA on 2022-03-21. Neither has a launch MSRP recorded.

Head-to-Head Benchmarks

The database records two direct head-to-head tests between these GPUs, and AMD wins both. In Geekbench OpenCL, the AMD Radeon PRO V620 scores 128580 against 105307 for the NVIDIA RTX A4500 Mobile. That is a 22.1% advantage. In Geekbench Vulkan, the gap widens dramatically: AMD scores 144364, NVIDIA scores 76960, and the delta is 87.6%.

The Vulkan result is the standout data point. An 87.6% margin in a modern cross-platform graphics and compute API is far larger than what the raw specification differences would predict. AMD's higher pixel rate and texture rate likely contribute, as does the higher boost clock of 2200 MHz versus 1500 MHz. The NVIDIA card's lower clocks are a consistent theme across all its recorded metrics.

It is also worth placing these scores in context with each card's nearest rivals in the database. The AMD Radeon PRO V620 averages 136472, which is 0.5% ahead of the AMD Radeon Pro W6800X Duo, 0.8% ahead of the AMD Radeon PRO W6800, 0.9% ahead of the NVIDIA A10M, and 0.9% ahead of the NVIDIA RTX 4000 Ada Generation. The NVIDIA RTX A4500 Mobile averages 91134, which is 0.6% behind the NVIDIA RTX A4500, 1.4% behind the AMD Radeon Instinct MI60, 4.2% ahead of the NVIDIA Quadro GP100, and 4.6% ahead of the AMD Radeon PRO W7600.

So the AMD card sits in a class of high-end accelerators clustered tightly around the 135k-136k average score range, while the NVIDIA mobile card sits in a lower band around 87k-92k. The two products are not competing in the same performance tier according to the recorded data, even though both are professional-grade GPUs.

The Verdict

The data is unambiguous: the AMD Radeon PRO V620 outperforms the NVIDIA RTX A4500 Mobile in every recorded benchmark. The OpenCL win is 22.1%, and the Vulkan win is 87.6%. The average benchmark score difference is 136472 versus 91134, a gap of roughly 45k points. The AMD card also has double the memory at 32 GB versus 16 GB, higher FP32 throughput at 20.28 TFLOPS versus 17.66 TFLOPS, higher pixel and texture rates, and a higher boost clock.

Who should pick the AMD Radeon PRO V620? Anyone building a stationary workstation that needs maximum compute throughput and large VRAM capacity. The 32 GB frame buffer is the most compelling practical advantage for workloads like rendering large scenes, training or inferencing with big models, or processing high-resolution data sets. The card's 300 W TDP and dual-slot footprint are acceptable in a desktop chassis, and the lack of display outputs is irrelevant if the system uses a separate display adapter. Its nearest rivals in the database, such as the AMD Radeon PRO W6800 and NVIDIA RTX 4000 Ada Generation, sit within 0.9% of its average score, so it is a competitive high-end option.

Who should pick the NVIDIA RTX A4500 Mobile? Only someone who requires a mobile workstation GPU. The 140 W power envelope, absence of external power connectors, and "Portable Device Dependent" display outputs all point to a laptop part. The 16 GB memory is still useful, and the 184 tensor cores give it dedicated hardware that the AMD card lacks, though no benchmark in the database isolates that capability. Its nearest rivals include the desktop NVIDIA RTX A4500, which scores 0.6% higher, and the AMD Radeon Instinct MI60, which scores 1.4% higher, so the mobile part is not even the strongest option in its own family.

The practical verdict: if the machine does not have to move, the AMD Radeon PRO V620 is the stronger choice by a wide margin. If the workload must run on a laptop, the NVIDIA RTX A4500 Mobile is the only one of these two that physically fits that role. There is no scenario in the recorded data where the NVIDIA card wins a performance comparison.