AMD Radeon PRO V620 vs AMD Radeon RX 6600 LE Comparison

Head-to-Head Benchmarks

The benchmark data presents a decisive picture: the AMD Radeon PRO V620 dominates the AMD Radeon RX 6600 LE in every recorded test. Across the two Geekbench workloads, the PRO V620 secures two wins, while the RX 6600 LE records zero. The margin is substantial, not marginal.

In Geekbench OpenCL, the PRO V620 scores 128,580 points against 69,229 for the RX 6600 LE. That is a delta of 85.7% in favor of the PRO V620. The RX 6600 LE would need to nearly double its output to match the PRO V620 in this compute-heavy workload. The OpenCL result reflects raw throughput potential, and the PRO V620 leverages its far larger execution resource pool to deliver nearly twice the performance.

The gap widens further in Geekbench Vulkan. The PRO V620 posts 144,364 points, while the RX 6600 LE manages 72,428. The delta here reaches 99.3%, meaning the PRO V620 is almost exactly twice as fast as the RX 6600 LE in this API. Vulkan workloads often scale with shader count and memory bandwidth, both areas where the PRO V620 holds a commanding lead. This near-doubling in performance is not a subtle advantage; it is a generational-class separation in compute output.

The average benchmark score across the recorded tests reinforces the same conclusion. The PRO V620 averages 136,472 points, placing it in the 96th percentile of all GPUs in the database. The RX 6600 LE averages 70,829 points, which still lands in the 91st percentile, a respectable showing for a consumer-oriented card. However, the absolute gap between the two is enormous: the PRO V620's average is roughly 93% higher than the RX 6600 LE's average. Both cards sit in the upper echelons of the database, but they occupy very different tiers within that range.

Context from nearest rivals helps frame the PRO V620's standing. Its average score of 136,472 sits just ahead of the AMD Radeon Pro W6800X Duo at 135,774, a 0.5% advantage. It also edges out the AMD Radeon PRO W6800 (135,396, 0.8% ahead), the NVIDIA A10M (135,230, 0.9% ahead), and the NVIDIA RTX 4000 Ada Generation (135,218, 0.9% ahead). The PRO V620 leads that cluster, but the margins are tight, all within one percentage point. This indicates the PRO V620 is firmly positioned among the top-tier workstation accelerators in the database.

The RX 6600 LE's rival cluster tells a different story. Its 70,829 average trails the AMD Radeon RX 6650M at 71,768, a 1.3% deficit, while leading the NVIDIA RTX A3000 Mobile (70,140, 1% ahead), the NVIDIA Quadro P6000 (69,986, 1.2% ahead), and the AMD Radeon Pro WX 8200 (69,870, 1.4% ahead). The RX 6600 LE sits in a competitive mid-range pack, with all deltas within roughly 1.4%. It is a solid performer in its class, but its class is far below the PRO V620's.

FAQ

Q: Which GPU is faster in Geekbench OpenCL?

A: The AMD Radeon PRO V620 wins decisively, scoring 128,580 against 69,229 for the AMD Radeon RX 6600 LE, a 85.7% advantage.

Q: How large is the Vulkan performance gap between the two cards?

A: The PRO V620 scores 144,364 in Geekbench Vulkan versus 72,428 for the RX 6600 LE, a 99.3% delta. The PRO V620 achieves nearly double the performance in this workload.

Q: Where does each card rank among all GPUs in the database?

A: The PRO V620 sits in the 96th percentile of all GPUs, while the RX 6600 LE ranks in the 91st percentile. Both are high performers, but the PRO V620 is in a distinctly higher tier.

Q: How does the PRO V620 compare to its nearest rivals?

A: The PRO V620 leads the AMD Radeon Pro W6800X Duo by 0.5%, the AMD Radeon PRO W6800 by 0.8%, and the NVIDIA A10M and NVIDIA RTX 4000 Ada Generation by 0.9% each, based on average benchmark scores.

Q: How does the RX 6600 LE stack up against its closest competitors?

A: The RX 6600 LE trails the AMD Radeon RX 6650M by 1.3% but leads the NVIDIA RTX A3000 Mobile by 1%, the NVIDIA Quadro P6000 by 1.2%, and the AMD Radeon Pro WX 8200 by 1.4% in average score.

Q: Does the RX 6600 LE win any benchmark category?

A: No. The recorded data shows the PRO V620 wins both Geekbench OpenCL and Geekbench Vulkan, giving it a 2 to 0 win tally in head-to-head results.

The Verdict

The data points to a clear hierarchy. The AMD Radeon PRO V620 is the superior performer in every measured workload, with margins that approach or exceed double the RX 6600 LE's output. Its 96th percentile ranking and position at the top of a rival cluster that includes the Radeon Pro W6800X Duo and NVIDIA RTX 4000 Ada Generation mark it as a high-end workstation compute card. The RX 6600 LE, while no slouch at the 91st percentile, operates in a different performance class, competing with mobile workstation GPUs and older professional cards like the Quadro P6000.

Who should pick which? The answer depends entirely on workload demands. If the task requires maximum compute throughput in OpenCL or Vulkan, the PRO V620 is the only choice between these two. Its 32 GB memory capacity, 512.0 GB/s bandwidth, and 20.28 TFLOPS FP32 throughput provide the resources needed for large datasets and heavy parallel workloads. The RX 6600 LE, with 8 GB memory and 224.0 GB/s bandwidth, would struggle to match that capacity and speed.

However, the RX 6600 LE is not without its own profile. It is an active production card, while the PRO V620 is end-of-life. The RX 6600 LE also offers display outputs (1x HDMI 2.1, 3x DisplayPort 1.4a), whereas the PRO V620 has no display outputs at all, making it a compute-only accelerator. The RX 6600 LE has a much lower TDP of 132 W versus 300 W for the PRO V620, and requires only a 300 W suggested PSU and a single 8-pin connector, compared to the PRO V620's 700 W suggested PSU and dual 8-pin connectors. The RX 6600 LE is also significantly smaller at 190 mm in length versus 267 mm for the PRO V620. For users who need a GPU that outputs to displays, fits in a compact chassis, and draws less power, the RX 6600 LE is the practical pick despite its lower scores. For raw compute performance, the PRO V620 wins outright.

Specification Differences

The two cards differ across nearly every major specification. The PRO V620 uses the Navi 21 chip with 4,608 shading units, 288 TMUs, 128 ROPs, and 72 ray accelerators. The RX 6600 LE uses the smaller Navi 23 chip with 1,792 shading units, 112 TMUs, 64 ROPs, and 28 ray accelerators. The PRO V620's base clock runs at 1,825 MHz with a boost clock of 2,200 MHz, while the RX 6600 LE has a higher boost clock of 10.5 inches higher at 2,495 MHz but a lower base clock of 1,626 MHz. The PRO V620's memory operates at 2,000 MHz with 16 Gbps effective speed, while the RX 6600 LE's memory runs at 1750 MHz with 14 Gbps effective speed.

Memory configurations diverge sharply. The PRO V620 carries 32 GB of GDDR6 on a 256-bit bus with 512.0 GB/s bandwidth. The RX 6600 LE has 8 GB of GDDR6 on a 128-bit bus with 224.0 GB/s bandwidth. Pixel rate favors the PRO V620 at 281.6 GPixel/s versus 159.7 GPixel/s for the RX 6600 LE. Texture rate follows the same pattern: 633.6 GTexel/s for the PRO V620 against 279.4 GTexel/s for the RX 6600 LE. FP32 compute also tells the story, with the PRO V620 delivering 20.28 TFLOPS versus 8.942 TFLOPS for the RX 6600 LE.

Power and physical specifications differ substantially. The PRO V620 draws 300 W TDP and requires a 700 W suggested PSU with dual 8-pin connectors. The RX 6600 LE draws 132 W TDP with a 300 W suggested PSU and a single 8-pin connector. The PRO V620 measures 267 mm long, 120 mm tall, and 50 mm wide. The RX 6600 LE measures 190 mm long, 110 mm tall, and 40 mm wide. The PRO V620 has no display outputs, while the RX 6600 LE offers 1x HDMI 2.1 and 3x DisplayPort 1.4a. The PRO V620 uses PCIe 4.0 x16, while the RX 6600 LE uses PCIe 4.0 x8. The PRO V620 is end-of-life with a release date of November 3, 2021, while the RX 6600 LE is active with a release date of December 7, 2023.

Architecture Differences

Both GPUs share the RDNA 2.0 architecture and are built on TSMC's 7 nm process, but the underlying silicon is very different in scale. The PRO V620's Navi 21 die is massive at 520 mm² with 26,800 million transistors, yielding a density of 51.5 million transistors per mm². The RX 6600 LE's Navi 23 die is far smaller at 237 mm² with 11,060 million transistors, resulting in a density of 46.7 million transistors per mm². The PRO V620's die is more than twice the physical size and packs more than twice the transistor count.

The execution resources scale accordingly. The PRO V620's 4,608 shading units and 288 TMUs dwarf the RX 6600 LE's 1,792 shading units and 112 TMUs. Ray tracing hardware also favors the PRO V620 with 72 ray accelerators versus 28 for the RX 6600 LE. This translates to the PRO V620's 20.28 TFLOPS FP32 throughput versus 8.942 TFLOPS for the RX 6600 LE, and 40.55 TFLOPS FP16 versus 17.88 TFLOPS. The PRO V620 belongs to the Radeon Pro Navi (Navi II Series) generation, while the RX 6600 LE is part of the Navi II (RX 6000) generation, both built on RDNA 2.0 but targeting different market segments. The PRO V620's predecessor is the Radeon Pro Vega, while the RX 6600 LE's predecessor is Navi and its successor is Navi III. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, so API feature parity exists despite the massive performance gap.