AMD Radeon Pro Vega 64X vs AMD Radeon RX 6600 LE Comparison

# Head-to-Head Benchmarks

The single direct benchmark comparison available shows the AMD Radeon Pro Vega 64X defeating the AMD Radeon RX 6600 LE in Geekbench OpenCL. The Vega 64X scores 78,467 versus 69,229 for the RX 6600 LE, producing a 13.3% margin. This is a notable gap in raw compute throughput, and it aligns with the architectural priorities of each card. The Vega 64X carries 4,096 shading units, more than double the 1,792 of the RX 6600 LE, and its 12.03 TFLOPS FP32 output comfortably exceeds the 8.942 TFLOPS of the RX 6600 LE.

However, benchmark results are not uniform across all workloads. The RX 6600 LE posts a Geekbench Vulkan score of 72,428, which is higher than its OpenCL result of 69,229. The Vega 64X has no Vulkan result in the data, but its OpenCL score of 78,467 suggests it would remain competitive in Vulkan scenarios given its larger compute resource pool. The RX 6600 LE also counters in memory technology efficiency: its GDDR6 memory runs at 14 Gbps effective, while the Vega 64X's HBM2 runs at 2 Gbps effective. The RX 6600 LE's 159.7 GPixel/s pixel rate is substantially higher than the Vega 64X's 93.95 GPixel/s, indicating a potential advantage in fill-rate-limited scenes.

The average benchmark scores tell a similar story. The Vega 64X averages 80,959 across its two benchmark entries, placing it in the 92nd percentile of all GPUs. The RX 6600 LE averages 70,829 across its two entries, landing in the 91st percentile. That 1-percentage-point percentile difference masks a 14.3% raw score gap, but the RX 6600 LE's proximity in percentile shows it remains a highly capable card for its class.

Looking at nearest rivals clarifies the positioning. The Vega 64X's average score sits 1.3% below the AMD Radeon PRO W6600 (81,995) and 1.4% above the NVIDIA GeForce RTX 5090 (79,842). The RX 6600 LE's average is 1.0% above the NVIDIA RTX A3000 Mobile (70,140) and 1.3% below the AMD Radeon RX 6650M (71,768). These deltas are small, suggesting both cards are tightly grouped with their immediate competitors.

FAQ

Q: Which card has the higher average benchmark score?

A: The AMD Radeon Pro Vega 64X averages 80,959 across its Geekbench Metal and OpenCL results, while the AMD Radeon RX 6600 LE averages 70,829 across its OpenCL and Vulkan results. That is a 14.3% difference in favor of the Vega 64X.

Q: Does the RX 6600 LE support ray tracing?

A: Yes. The RX 6600 LE includes 28 ray tracing cores and supports DirectX 12 Ultimate (12_2). The Vega 64X has no ray tracing cores and only supports DirectX 12 (12_1).

Q: What is the memory configuration difference?

A: The Vega 64X uses 16 GB of HBM2 on a 2048-bit bus with 512.0 GB/s bandwidth. The RX 6600 LE uses 8 GB of GDDR6 on a 128-bit bus with 224.0 GB/s bandwidth. The Vega 64X has both more capacity and more than double the bandwidth.

Q: Which card is more power-efficient?

A: The RX 6600 LE has a 132 W TDP versus 250 W for the Vega 64X. The RX 6600 LE also suggests a 300 W power supply, while the Vega 64X requires no external power connectors and is integrated into the system (IGP form factor).

Q: How do their production statuses compare?

A: The Vega 64X is end-of-life, released on 2019-03-18. The RX 6600 LE is active, released on 2023-12-07. The RX 6600 LE is also part of an active series with a successor (Navi III), while the Vega 64X has no listed successor.

Q: Which card has better API support?

A: The RX 6600 LE supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The Vega 64X supports DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.3. The RX 6600 LE has a higher DirectX feature level and a newer Vulkan version.

Architecture Differences

The two cards represent fundamentally different design philosophies from AMD. The Vega 64X is built on the GCN 5.0 architecture with a Vega 10 chip, manufactured on a 14 nm process by GlobalFoundries. It packs 12,500 million transistors into a 495 mm² die, yielding a transistor density of 25.3M per mm². The RX 6600 LE uses RDNA 2.0 with a Navi 23 chip, built on a 7 nm process by TSMC. It contains 11,060 million transistors on a much smaller 237 mm² die, achieving 46.7M transistors per mm². That is nearly double the transistor density, reflecting the newer process technology.

The Vega 64X relies on a massive compute array: 4,096 shading units, 256 texture mapping units, and 64 ROPs. The RX 6600 LE has 1,792 shading units, 112 TMUs, and 64 ROPs. Despite having fewer than half the shading units, the RX 6600 LE achieves a higher pixel rate (159.7 GPixel/s vs 93.95 GPixel/s) and a respectable texture rate (279.4 GTexel/s vs 375.8 GTexel/s for the Vega 64X). The RX 6600 LE's boost clock of 2495 MHz, compared to 1468 MHz for the Vega 64X, explains much of this efficiency.

Memory architecture is another major divergence. The Vega 64X uses 16 GB of HBM2 with a 2048-bit bus and 512.0 GB/s bandwidth. The RX 6600 LE uses 8 GB of GDDR6 with a 128-bit bus and 224.0 GB/s bandwidth. The Vega 64X's HBM2 operates at 1000 MHz (2 Gbps effective), while the RX 6600 LE's GDDR6 runs at 1750 MHz (14 Gbps effective). The Vega 64X's wider bus compensates for lower clock speeds, delivering over double the bandwidth.

Feature support differs sharply. The RX 6600 LE includes 28 ray tracing cores and supports DirectX 12 Ultimate, Vulkan 1.4, and PCIe 4.0 x8. The Vega 64X has no ray tracing cores, supports DirectX 12 (12_1), Vulkan 1.3, and PCIe 3.0 x16. The RX 6600 LE also offers standard display outputs (1x HDMI 2.1, 3x DisplayPort 1.4a), while the Vega 64X's outputs are portable device dependent, reflecting its integrated (IGP) design.

The Verdict

The data presents a clear trade-off between raw compute and modern features. The Vega 64X wins the only direct benchmark comparison, taking Geekbench OpenCL by 13.3% with scores of 78,467 vs 69,229. Its average benchmark score of 80,959 also places it 14.3% ahead of the RX 6600 LE's 70,829. For workloads that leverage massive parallel compute — think FP32 throughput, texture fill, and memory bandwidth — the Vega 64X is the stronger choice. Its 512.0 GB/s bandwidth and 16 GB of HBM2 memory give it a substantial edge in memory-heavy tasks.

However, the RX 6600 LE counters with architectural modernity. It is built on a 7 nm process with RDNA 2.0, featuring ray tracing cores, DirectX 12 Ultimate support, and Vulkan 1.4. Its 132 W TDP is nearly half the Vega 64X's 250 W, and it requires only a 300 W suggested power supply. The RX 6600 LE is also an active product with a successor in development, while the Vega 64X is end-of-life. For a builder prioritizing efficiency, modern API support, and future-proofing, the RX 6600 LE is the rational pick despite its lower raw scores.

The percentile rankings are close — 92nd for the Vega 64X versus 91st for the RX 6600 LE — which indicates both cards perform in a similar tier overall. The Vega 64X's lead in raw compute is offset by the RX 6600 LE's feature set and power efficiency. Choose the Vega 64X for compute-dense professional workloads where memory bandwidth and FP32 throughput dominate. Choose the RX 6600 LE for a modern, efficient card with ray tracing and newer API support.

Specification Differences

| Specification | AMD Radeon Pro Vega 64X | AMD Radeon RX 6600 LE |

|---|---|---|

| Architecture | GCN 5.0 | RDNA 2.0 |

| Chip | Vega 10 | Navi 23 |

| Process Node | 14 nm | 7 nm |

| Foundry | GlobalFoundries | TSMC |

| Transistors | 12,500 million | 11,060 million |

| Die Size | 495 mm² | 237 mm² |

| Transistor Density | 25.3M / mm² | 46.7M / mm² |

| Base Clock | 1250 MHz | 1626 MHz |

| Boost Clock | 1468 MHz | 2495 MHz |

| Game Clock | N/A | 2045 MHz |

| Memory Clock | 1000 MHz (2 Gbps effective) | 1750 MHz (14 Gbps effective) |

| Memory Size | 16 GB | 8 GB |

| Memory Type | HBM2 | GDDR6 |

| Memory Bus | 2048 bit | 128 bit |

| Memory Bandwidth | 512.0 GB/s | 224.0 GB/s |

| Shading Units | 4096 | 1792 |

| TMUs | 256 | 112 |

| ROPs | 64 | 64 |

| RT Cores | N/A | 28 |

| Pixel Rate | 93.95 GPixel/s | 159.7 GPixel/s |

| Texture Rate | 375.8 GTexel/s | 279.4 GTexel/s |

| FP32 | 12.03 TFLOPS | 8.942 TFLOPS |

| FP16 | 24.05 TFLOPS (2:1) | 17.88 TFLOPS (2:1) |

| TDP | 250 W | 132 W |

| Slot Width | IGP | Dual-slot |

| Power Connectors | None | 1x 8-pin |

| Suggested PSU | N/A | 300 W |

| Bus Interface | PCIe 3.0 x16 | PCIe 4.0 x8 |

| Display Outputs | Portable Device Dependent | 1x HDMI 2.1, 3x DisplayPort 1.4a |

| DirectX | 12 (12_1) | 12 Ultimate (12_2) |

| Vulkan | 1.3 | 1.4 |

| Production Status | End-of-life | Active |

| Release Date | 2019-03-18 | 2023-12-07 |

Where Each One Wins

The AMD Radeon Pro Vega 64X wins in raw compute performance. Its Geekbench OpenCL score of 78,467 beats the RX 6600 LE's 69,229 by 13.3%. The Vega 64X's 12.03 TFLOPS FP32 output, 375.8 GTexel/s texture rate, and 512.0 GB/s memory bandwidth make it the clear choice for compute-heavy applications like machine learning inference, scientific simulation, or large dataset processing. Its 16 GB of HBM2 memory provides both capacity and bandwidth that the RX 6600 LE cannot match. The Vega 64X also holds a 1.4% average score advantage over the NVIDIA GeForce RTX 5090 and a 2% edge over the NVIDIA Tesla P100 PCIe 12 GB, showing it competes with high-end accelerators.

The AMD Radeon RX 6600 LE wins in efficiency and modern features. Its 132 W TDP is less than half the Vega 64X's 250 W, and its 7 nm process with 46.7M transistors per mm² demonstrates far superior density. The RX 6600 LE's 28 ray tracing cores and DirectX 12 Ultimate support enable hardware-accelerated ray tracing, which the Vega 64X cannot do. Its Vulkan 1.4 support and PCIe 4.0 x8 interface provide newer connectivity standards. The RX 6600 LE also achieves a higher pixel rate (159.7 GPixel/s vs 93.95 GPixel/s), suggesting an advantage in fill-rate-bound rendering scenarios. Its 2,495 MHz boost clock, compared to 1,468 MHz for the Vega 64X, indicates stronger per-clock efficiency.

For gaming and consumer workloads, the RX 6600 LE is the more practical option. It is an active product with a successor in development, while the Vega 64X is end-of-life. The RX 6600 LE's standard display outputs and dual-slot form factor make it easier to integrate into a typical PC build. The Vega 64X's IGP form factor and portable-device-dependent outputs limit its usability to specialized systems. Benchmark data shows the RX 6600 LE sits 1.3% below the AMD Radeon RX 6650M, a close competitor, but its feature set and efficiency make it a strong modern choice.