AMD Radeon PRO V620 vs AMD Radeon RX 7900M Comparison

The AMD Radeon PRO V620 and AMD Radeon RX 7900M represent two distinct philosophies from the same manufacturer: one is a data-center accelerator, and the other is a high-end mobile graphics processor. The benchmark data reveals a clear, though not overwhelming, performance hierarchy, with the RX 7900M taking the lead in both available head-to-head tests. The PRO V620, with its older architecture and double the memory, remains a formidable compute card, but the newer mobile part demonstrates superior raw throughput in the measured scenarios.

Head-to-Head Benchmarks

The head-to-head comparison is sparse but decisive, with the AMD Radeon RX 7900M winning both tests. In the Geekbench OpenCL test, the scores are nearly identical: the RX 7900M scores 129,499 against the PRO V620’s 128,580, resulting in a 0.7% advantage for the mobile part. This is effectively a statistical tie, indicating that in a raw compute workload that is not heavily optimized for either architecture, the two cards deliver comparable performance despite their generational gap.

The more substantial divergence appears in the Geekbench Vulkan test. Here, the RX 7900M scores 158,760, while the PRO V620 trails at 144,364. This translates to a 9.1% lead for the RX 7900M, a significant margin that suggests the newer RDNA 3.0 architecture has a more pronounced advantage in the lower-level, driver-managed API. The data shows that the RX 7900M’s architectural improvements yield tangible benefits in Vulkan workloads, whereas the OpenCL performance remains largely unchanged between the two generations.

When examining the broader benchmark context, the average scores for these cards tell a different story. The PRO V620 has an average benchmark score of 136,472, while the RX 7900M averages 97,487. This discrepancy is explained by the test sets: the PRO V620’s average is derived from only its two Geekbench tests, both of which are high, whereas the RX 7900M’s average includes a third, more demanding test (3DMark Steel Nomad DX12) with a score of 4,201, which pulls its average down. It is crucial to note that the head-to-head tests are the only direct comparison points, and they show the RX 7900M ahead. In the overall percentile ranking, the PRO V620 sits at the 96th percentile of all GPUs, while the RX 7900M is at the 94th, a difference that reflects the inclusion of the lower 3DMark score in the latter’s dataset. The head-to-head wins remain the most reliable indicator of relative performance here.

Architecture Differences

The two cards are built on fundamentally different foundations. The PRO V620 uses the Navi 21 chip based on the RDNA 2.0 architecture, manufactured on a 7 nm process at TSMC. In contrast, the RX 7900M uses the Navi 31 chip with the newer RDNA 3.0 architecture, built on a more advanced 5 nm process. This node shrink is a primary driver of the performance and efficiency differences. The transistor count reflects this: the RX 7900M packs 57,700 million transistors on a 529 mm² die, resulting in a density of 109.1M transistors per mm². The PRO V620 has 26,800 million transistors on a slightly smaller 520 mm² die, yielding a much lower density of 51.5M per mm².

The core configurations are surprisingly similar. Both cards feature 4,608 shading units, 288 texture mapping units, and 72 ray tracing cores. The key difference lies in the render output units (ROPs), where the RX 7900M has 192 compared to the PRO V620’s 128. This 50% increase in ROPs explains why the RX 7900M achieves a higher pixel rate of 401.3 GPixel/s versus the PRO V620’s 281.6 GPixel/s, despite the latter having a higher boost clock. The texture rates are nearly identical, at 601.9 GTexel/s for the RX 7900M and 633.6 GTexel/s for the PRO V620, with the PRO V620’s higher clock slightly compensating for its smaller core count.

The memory subsystems also diverge significantly. The PRO V620 offers 32 GB of GDDR6 memory on a 256-bit bus, with a bandwidth of 512.0 GB/s. The RX 7900M, despite having half the capacity at 16 GB, uses faster GDDR6 memory on the same 256-bit bus, achieving a higher bandwidth of 576.0 GB/s. The memory clocks reflect this: the RX 7900M runs at 2250 MHz (18 Gbps effective) versus the PRO V620’s 2000 MHz (16 Gbps effective). The floating-point performance is starkly different; the RX 7900M delivers 38.52 TFLOPS FP32 and 77.05 TFLOPS FP16, while the PRO V620 manages 20.28 TFLOPS FP32 and 40.55 TFLOPS FP16. This makes the RX 7900M nearly twice as powerful in raw compute throughput per clock, a hallmark of the RDNA 3.0 architecture’s dual-issue design. The power profiles are equally distinct: the PRO V620 is a 300 W dual-slot card requiring two 8-pin power connectors and a 700 W power supply, while the RX 7900M is an IGP (integrated graphics processor) with a 180 W TDP and no power connectors, designed for portable devices.

FAQ

Q: Which card is faster in the Geekbench Vulkan benchmark?

A: The AMD Radeon RX 7900M is faster, scoring 158,760 compared to the PRO V620’s 144,364, a 9.1% lead.

Q: Do both cards have the same number of shading units?

A: Yes, both the AMD Radeon PRO V620 and the AMD Radeon RX 7900M have 4,608 shading units.

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

A: The AMD Radeon PRO V620 has 32 GB of GDDR6 memory, while the AMD Radeon RX 7900M has 16 GB of GDDR6 memory.

Q: Which card has a higher memory bandwidth?

A: The AMD Radeon RX 7900M has a higher memory bandwidth of 576.0 GB/s, whereas the AMD Radeon PRO V620 provides 512.0 GB/s.

Q: Is the AMD Radeon RX 7900M a desktop graphics card?

A: No, the RX 7900M is classified as an IGP (integrated graphics processor) with a 180 W TDP, designed for portable devices, while the PRO V620 is a dual-slot card with a 300 W TDP.

Q: What are the production statuses of these two cards?

A: The AMD Radeon PRO V620 is marked as End-of-life, while the AMD Radeon RX 7900M is listed as Active.

The Verdict

The data indicates that the AMD Radeon RX 7900M is the superior performer in the direct head-to-head benchmarks, winning both tests. If the selection criterion is purely based on the measured Geekbench scores, the RX 7900M is the clear choice. However, the PRO V620 counters with a significant advantage in memory capacity, offering 32 GB versus 16 GB, which is a critical factor for workloads that require large datasets to reside in video memory. The RX 7900M also exhibits a much higher compute throughput (38.52 TFLOPS FP32) and a higher pixel rate, making it the more powerful compute engine on paper. The PRO V620’s higher boost clock of 2200 MHz versus 2090 MHz for the RX 7900M does not translate to a performance win in these tests.

The choice between these two rests on the specific workload. For tasks that are limited by memory capacity, the PRO V620’s 32 GB is a decisive advantage, as the RX 7900M’s 16 GB could be a bottleneck. For tasks that are compute-bound or benefit from the newer architecture’s efficiency, the RX 7900M’s higher TFLOPS and faster memory are more attractive. The RX 7900M also offers a much more flexible form factor, with no power connectors and a lower TDP, making it suitable for mobile workstations, whereas the PRO V620 is a traditional add-in card for servers or workstations. The end-of-life status of the PRO V620 further suggests that the RX 7900M is the more future-proof option, despite its lower overall benchmark average when including the 3DMark result.

Specification Differences

The primary specification differences between the two cards are as follows:

• Architecture: RDNA 2.0 (PRO V620) versus RDNA 3.0 (RX 7900M).
• Process Node: 7 nm (PRO V620) versus 5 nm (RX 7900M).
• Transistors: 26,800 million (PRO V620) versus 57,700 million (RX 7900M).
• Transistor Density: 51.5M / mm² (PRO V620) versus 109.1M / mm² (RX 7900M).
• Boost Clock: 2200 MHz (PRO V620) versus 2090 MHz (RX 7900M).
• Memory Size: 32 GB (PRO V620) versus 16 GB (RX 7900M).
• Memory Clock: 2000 MHz / 16 Gbps effective (PRO V620) versus 2250 MHz / 18 Gbps effective (RX 7900M).
• Memory Bandwidth: 512.0 GB/s (PRO V620) versus 576.0 GB/s (RX 7900M).
• ROPs: 128 (PRO V620) versus 192 (RX 7900M).
• Pixel Rate: 281.6 GPixel/s (PRO V620) versus 401.3 GPixel/s (RX 7900M).
• FP32 Performance: 20.28 TFLOPS (PRO V620) versus 38.52 TFLOPS (RX 7900M).
• FP16 Performance: 40.55 TFLOPS (PRO V620) versus 77.05 TFLOPS (RX 7900M).
• TDP: 300 W (PRO V620) versus 180 W (RX 7900M).
• Slot Width: Dual-slot (PRO V620) versus IGP (RX 7900M).
• Power Connectors: 2x 8-pin (PRO V620) versus None (RX 7900M).
• Display Outputs: No outputs (PRO V620) versus Portable Device Dependent (RX 7900M).

Where Each One Wins

AMD Radeon PRO V620: The PRO V620 wins decisively in memory capacity, offering double the VRAM of the RX 7900M. This makes it the better choice for large-scale deep learning models, complex 3D rendering scenes, or any professional visualization workload that demands more than 16 GB of framebuffer. It also has a higher boost clock (2200 MHz vs 2090 MHz) and a slightly higher texture fill rate (633.6 GTexel/s vs 601.9 GTexel/s), which could provide marginal benefits in texture-heavy applications. Its dual-slot, 300 W design with two 8-pin connectors is typical for a workstation card, and its 96th percentile ranking versus the RX 7900M’s 94th suggests that across a broader range of professional tests, it holds its own.

AMD Radeon RX 7900M: The RX 7900M wins in every direct head-to-head benchmark, with a 0.7% lead in OpenCL and a 9.1% lead in Vulkan. It is also significantly more powerful in raw compute, with nearly double the FP32 and FP16 throughput. Its higher ROP count and memory bandwidth make it superior for pixel-heavy workloads and high-resolution gaming. The RX 7900M’s 180 W TDP and IGP form factor with no power connectors make it vastly more power-efficient and portable, suitable for laptops where space and thermal limits are strict. The data shows it is the faster and more modern GPU, and its Active production status ensures continued availability and support.