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

AMD Radeon Pro Vega 64 and AMD Radeon RX 6600 LE are two very different AMD graphics cards separated by six years of architecture evolution. The Pro Vega 64 is a 2017-era workstation-oriented part built on the massive Vega 10 chip, while the RX 6600 LE is a 2023 mainstream gaming card using the much smaller Navi 23 die. Despite their generational gap, their average benchmark scores land within 1.1% of each other — 75191 for the Pro Vega 64 versus 74393 for the RX 6600 LE — making this a surprisingly close contest that comes down to workload and feature support rather than raw compute dominance.

Where Each One Wins

The data splits cleanly along API lines. The RX 6600 LE wins both head-to-head benchmark tests listed: it scores 72784 in Geekbench OpenCL against the Pro Vega 64’s 71195, a 2.2% advantage, and it posts 76001 in Geekbench Vulkan versus 73720, a 3% lead. If you are running Vulkan-based games or OpenCL applications that favor newer instruction paths, the RX 6600 LE is the pick.

The Pro Vega 64, however, has no benchmark victories in the head-to-head data — winsA is 0. Its strength lies elsewhere: it holds a 1.1% higher average score across all benchmarks (75191 versus 74393) and carries 16 GB of HBM2 memory on a 2048-bit bus, giving it 402.4 GB/s of bandwidth. That is memory capacity and bandwidth for large datasets, not necessarily speed in synthetic tests. The RX 6600 LE counters with 8 GB of GDDR6 on a 128-bit bus at 224.0 GB/s.

For raw compute throughput, the Pro Vega 64 leads with 11.06 TFLOPS FP32 versus the RX 6600 LE’s 8.942 TFLOPS. But the RX 6600 LE wins on fill rates: 159.7 GPixel/s pixel rate versus 86.40 GPixel/s, and it nearly matches texture rate at 279.4 GTexel/s versus 345.6 GTexel/s — actually lower, but close given the pixel advantage. The practical split: Pro Vega 64 for bandwidth-hungry compute, RX 6600 LE for rasterization-heavy workloads.

Architecture Differences

The two GPUs represent opposite design philosophies. The Pro Vega 64 uses the Vega 10 chip on GCN 5.0 architecture, built on a 14 nm process at GlobalFoundries. That chip packs 12,500 million transistors into a 495 mm² die, yielding a transistor density of 25.3M per mm². It is a large, power-hungry design with 4096 shading units, 256 TMUs, and 64 ROPs.

The RX 6600 LE uses Navi 23 on RDNA 2.0 architecture, fabricated on TSMC’s 7 nm process. It fits 11,060 million transistors into just 237 mm², achieving 46.7M transistors per mm² — nearly double the density. The shader count drops to 1792, with 112 TMUs and 64 ROPs. Crucially, the RX 6600 LE has 28 ray tracing cores; the Pro Vega 64 has none. The RDNA 2 card also supports DirectX 12 Ultimate (12_2) versus the Pro Vega 64’s DirectX 12 (12_1), and Vulkan 1.4 versus 1.3.

Memory architecture is fundamentally different. The Pro Vega 64 uses 16 GB of HBM2 with a 2048-bit bus for 402.4 GB/s bandwidth. The RX 6600 LE uses 8 GB of GDDR6 on a 128-bit bus, achieving 224.0 GB/s. Clock speeds tell the rest of the story: the Pro Vega 64 runs at 1250 MHz base and 1350 MHz boost, with memory at 1572 Mbps effective. The RX 6600 LE boosts to 2495 MHz with a 2045 MHz game clock and memory at 14 Gbps effective. The newer card’s higher clocks compensate for fewer shaders.

Power and physical design differ sharply. The Pro Vega 64 is rated at 250 W TDP, uses an IGP slot width with no power connectors, and has portable-device-dependent display outputs. The RX 6600 LE is a 132 W dual-slot card with a single 8-pin power connector, a 300 W suggested PSU, and fixed outputs (1x HDMI 2.1, 3x DisplayPort 1.4a). It measures 190 mm by 110 mm by 40 mm. The Pro Vega 64’s dimensions are not listed.

Head-to-Head Benchmarks

The two available head-to-head tests both favor the RX 6600 LE, but the margins are modest. In Geekbench OpenCL, the RX 6600 LE scores 72784 against the Pro Vega 64’s 71195 — a 2.2% delta. This is notable because the Pro Vega 64 has higher FP32 throughput (11.06 versus 8.942 TFLOPS) and more memory bandwidth (402.4 versus 224.0 GB/s). The newer RDNA 2 architecture extracts more real-world performance from fewer resources, likely due to better instruction efficiency and higher clocks.

In Geekbench Vulkan, the RX 6600 LE extends its lead slightly: 76001 versus 73720, a 3% delta. Vulkan is the API where RDNA 2’s modern design should shine, and the data confirms it. The Pro Vega 64’s GCN 5.0 architecture, while capable, does not scale as well in this test. The RX 6600 LE also has a higher average benchmark score in its own right — 74393 — but the Pro Vega 64’s average of 75191 edges it out by 1.1%, meaning the older card performs better in non-head-to-head tests not listed here.

Looking at the nearest rivals provides context. The Pro Vega 64’s closest competitor is the RX 6650M XT at 76768 (-2.1% delta), followed by the RX 6600 LE at 74393 (+1.1%). The RX 6600 LE’s nearest rival is the Vega Frontier Edition at 73607 (+1.1%), with the Pro Vega 64 at -1.1%. Both cards sit in the 93rd percentile of all GPUs, indicating near-identical overall standing despite the architectural chasm.

The Verdict

Choose the AMD Radeon RX 6600 LE if you prioritize Vulkan performance, ray tracing support, or modern API compliance. It wins both head-to-head benchmarks, offers DirectX 12 Ultimate and Vulkan 1.4, includes 28 ray tracing cores, and consumes far less power at 132 W versus 250 W. Its dual-slot design with an 8-pin connector and 300 W suggested PSU makes it a straightforward drop-in for a standard desktop build. The 7 nm process and 237 mm² die also indicate better thermal behavior, though no thermals are listed.

Choose the AMD Radeon Pro Vega 64 if you need massive memory capacity or bandwidth for compute tasks. Its 16 GB of HBM2 on a 2048-bit bus at 402.4 GB/s is more than the RX 6600 LE’s 8 GB at 224.0 GB/s, and its 11.06 TFLOPS FP32 output exceeds the newer card’s 8.942 TFLOPS. It holds a 1.1% higher average benchmark score, suggesting broad compute strengths beyond the two tested APIs. However, its IGP form factor, lack of power connectors, and portable-device-dependent outputs mean it is not a typical desktop card — it is designed for integrated systems like Mac Pro modules.

For gaming, the RX 6600 LE is the logical choice: ray tracing, higher pixel rate (159.7 versus 86.40 GPixel/s), and Vulkan wins. For professional or scientific workloads that can use 16 GB of memory and 402.4 GB/s bandwidth, the Pro Vega 64 remains relevant despite being end-of-life since 2017. The RX 6600 LE is active and newer (released December 2023 versus June 2017), so it offers a longer support horizon.

FAQ

Q: Which card has a higher average benchmark score?

A: The AMD Radeon Pro Vega 64 scores 75191, which is 1.1% higher than the RX 6600 LE’s 74393.

Q: Does the RX 6600 LE support ray tracing?

A: Yes, it has 28 ray tracing cores. The Pro Vega 64 has no ray tracing cores listed.

Q: What are the memory configurations?

A: The Pro Vega 64 has 16 GB of HBM2 on a 2048-bit bus with 402.4 GB/s bandwidth. The RX 6600 LE has 8 GB of GDDR6 on a 128-bit bus with 224.0 GB/s bandwidth.

Q: Which card wins in Vulkan performance?

A: The RX 6600 LE scores 76001 in Geekbench Vulkan, 3% higher than the Pro Vega 64’s 73720.

Q: What are the power requirements?

A: The Pro Vega 64 has a 250 W TDP with no power connectors and an IGP slot width. The RX 6600 LE has a 132 W TDP, uses a dual-slot design with one 8-pin connector, and suggests a 300 W PSU.

Q: Which card is newer and still in production?

A: The RX 6600 LE was released on December 7, 2023, and has an active production status. The Pro Vega 64 was released on June 26, 2017, and is end-of-life.

Specification Differences

| Field | AMD Radeon Pro Vega 64 | AMD Radeon RX 6600 LE |

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

| Chip | Vega 10 | Navi 23 |

| Architecture | GCN 5.0 | RDNA 2.0 |

| 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 | 1350 MHz | 2495 MHz |

| Game Clock | None | 2045 MHz |

| Memory Clock | 1572 Mbps effective | 14 Gbps effective |

| Memory Size | 16 GB | 8 GB |

| Memory Type | HBM2 | GDDR6 |

| Memory Bus Width | 2048 bit | 128 bit |

| Memory Bandwidth | 402.4 GB/s | 224.0 GB/s |

| Shading Units | 4096 | 1792 |

| TMUs | 256 | 112 |

| ROPs | 64 | 64 |

| Ray Tracing Cores | None | 28 |

| Pixel Rate | 86.40 GPixel/s | 159.7 GPixel/s |

| Texture Rate | 345.6 GTexel/s | 279.4 GTexel/s |

| FP32 | 11.06 TFLOPS | 8.942 TFLOPS |

| FP16 | 22.12 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 | None | 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) |

| OpenGL | 4.6 | 4.6 |

| Vulkan | 1.3 | 1.4 |

| Dimensions (L×H×W) | Not listed | 190 mm × 110 mm × 40 mm |

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

| Release Date | June 26, 2017 | December 7, 2023 |

| Predecessor | None | Navi |

| Successor | None | Navi III |