AMD Radeon RX 6600 LE vs NVIDIA Quadro P6000 Comparison

The AMD Radeon RX 6600 LE and NVIDIA Quadro P6000 represent two very different approaches to GPU design, separated by seven years of architectural evolution. The data shows a near-tie in average benchmark scores, with the RX 6600 LE posting 70,829 and the Quadro P6000 at 69,986, a margin of just 1.2%. This places the AMD card at the 91st percentile of all GPUs and NVIDIA at the 90th, making their overall performance class nearly identical despite their internal differences. The real story emerges in how each card achieves this parity—one through modern efficiency and the other through sheer brute-force specification.

Head-to-Head Benchmarks

The two GPUs split their benchmark wins exactly one apiece, with each taking a different API. In Geekbench OpenCL, the AMD Radeon RX 6600 LE scores 69,229 against the Quadro P6000's 66,382, giving AMD a 4.3% lead. This is a meaningful margin in compute workloads that leverage OpenCL, reflecting the RDNA 2 architecture's strength in general-purpose parallel tasks. The RX 6600 LE achieves this with 1,792 shading units and 8.942 TFLOPS of FP32 performance, compared to the Quadro's 3,840 shading units and 12.63 TFLOPS—meaning AMD's smaller, more efficient design is extracting more useful work per shader in this particular test.

The tables turn in Geekbench Vulkan, where the NVIDIA Quadro P6000 scores 73,590 against the RX 6600 LE's 72,428, a 1.6% advantage for NVIDIA. This reversal suggests the Pascal architecture's driver maturity or memory subsystem plays better with Vulkan's low-level API. The Quadro's 432.8 GB/s of memory bandwidth and 384-bit bus width provide a substantial 93% bandwidth advantage over the RX 6600 LE's 224.0 GB/s, likely contributing to its Vulkan edge. Yet the delta is small—less than 2%—indicating the AMD card's newer architecture compensates for its narrower memory interface.

Looking at the average scores from their nearest rivals, the RX 6600 LE sits just 1% behind the NVIDIA RTX A3000 Mobile (70,140) and 1.4% ahead of the AMD Radeon Pro WX 8200 (69,870). The Quadro P6000, meanwhile, is 0.2% behind the Radeon Pro WX 8200 and 1.4% ahead of the NVIDIA CMP 90HX (69,000). Both cards occupy a tight performance cluster where 1-2% swings separate competitors, making the head-to-head results even more significant—they are not separated by a wide gulf but rather by API-specific quirks.

Where Each One Wins

The AMD Radeon RX 6600 LE wins in OpenCL compute scenarios, as shown by its 4.3% lead in that benchmark. This advantage likely stems from its RDNA 2 architecture's efficient FP32 throughput and 17.88 TFLOPS of FP16 performance (at 2:1 ratio), which allows rapid processing of half-precision workloads that modern compute applications increasingly use. The card's 28 ray accelerators also give it hardware-accelerated ray tracing capabilities, a feature entirely absent from the Quadro P6000, making it the better choice for any workload that touches real-time ray tracing or DirectX 12 Ultimate features.

The NVIDIA Quadro P6000 wins in Vulkan-based workloads, with its 1.6% edge in that benchmark. This is complemented by its massive 24 GB of GDDR5X memory—three times the RX 6600 LE's 8 GB—which allows it to hold far larger datasets, textures, or models entirely in VRAM. For tasks like large-scale scientific visualization, machine learning inference with big batch sizes, or multi-monitor professional setups, that memory capacity is a decisive factor that no benchmark score fully captures. Its 12.63 TFLOPS of FP32 compute and 394.8 GTexel/s texture rate also provide raw throughput advantages that could manifest in sustained rendering or simulation workloads not covered by the Geekbench suite.

The RX 6600 LE counters with superior energy efficiency. Its 132 W TDP versus the Quadro's 250 W means the AMD card delivers comparable performance at nearly half the power draw, and its 300 W suggested PSU requirement versus 600 W makes it far less demanding on system power delivery. The AMD card is also dramatically more compact at 190 mm length versus 267 mm, fitting into smaller chassis where the Quadro would not.

The Verdict

The data supports a clear split recommendation based on workload priorities. The AMD Radeon RX 6600 LE should be the pick for users running OpenCL-heavy compute tasks or needing modern features like ray tracing and DirectX 12 Ultimate support. Its 4.3% OpenCL win, combined with 28 ray accelerators and a 7 nm process node (versus 16 nm), gives it a future-proofing advantage that the Quadro cannot match. The card's active production status and 2023 release date also mean ongoing driver support, while the Quadro is end-of-life with a 2016 launch.

The NVIDIA Quadro P6000 is the pick for Vulkan-centric workloads and, more importantly, for any application that requires more than 8 GB of VRAM. Its 24 GB capacity is a hard requirement for certain professional datasets, and no benchmark score can substitute for having enough memory to load the entire working set. The Quadro also wins on raw FP32 throughput at 12.63 TFLOPS and texture rate at 394.8 GTexel/s, which may translate to better performance in specific Vulkan-rendered scenes despite the narrow 1.6% benchmark margin.

For the average user, the RX 6600 LE is the more rational choice: it matches or beats the Quadro in compute benchmarks, uses less power, runs cooler, and costs significantly less—the Quadro's launch MSRP is 5,999 USD. But for a professional whose software refuses to run without massive VRAM, the Quadro P6000's 24 GB makes it the only viable option between these two, regardless of its lower average score.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The AMD Radeon RX 6600 LE has an average benchmark score of 70,829, which is 1.2% higher than the NVIDIA Quadro P6000's 69,986.

Q: How do they compare in OpenCL performance?

A: The RX 6600 LE wins Geekbench OpenCL with a score of 69,229 versus 66,382 for the Quadro P6000, giving AMD a 4.3% advantage in that API.

Q: Which card has more VRAM, and why does it matter?

A: The NVIDIA Quadro P6000 has 24 GB of GDDR5X memory, three times the RX 6600 LE's 8 GB of GDDR6. This allows the Quadro to hold larger datasets entirely in memory, which is critical for professional workloads that exceed 8 GB.

Q: What are the memory bandwidth differences?

A: The Quadro P6000 offers 432.8 GB/s of bandwidth via a 384-bit bus, while the RX 6600 LE provides 224.0 GB/s through a 128-bit bus. The Quadro has a 93% bandwidth advantage.

Q: Which card supports ray tracing?

A: Only the AMD Radeon RX 6600 LE has ray accelerators (28 of them). The NVIDIA Quadro P6000 has no ray tracing cores, as it predates that technology.

Q: What is the power consumption difference?

A: The RX 6600 LE has a TDP of 132 W and requires a 300 W PSU, while the Quadro P6000 has a 250 W TDP and requires a 600 W PSU. The AMD card uses about 47% less power.

Architecture Differences

The two GPUs embody distinct architectural generations. The AMD Radeon RX 6600 LE uses the RDNA 2.0 architecture on a 7 nm TSMC process, packing 11,060 million transistors into a 237 mm² die—a transistor density of 46.7 million per square millimeter. It features 28 ray accelerators dedicated to hardware ray tracing, a technology completely absent from the Quadro. The architecture supports DirectX 12 Ultimate (12_2), giving it access to advanced features like mesh shaders and variable rate shading that the Quadro cannot use.

The NVIDIA Quadro P6000 uses the older Pascal architecture on a 16 nm TSMC process, with 11,800 million transistors spread across a much larger 471 mm² die, resulting in a lower density of 25.1 million per square millimeter. It has no ray tracing or tensor cores, and its DirectX support is limited to 12 (12_1), one tier below the AMD card's Ultimate designation. Pascal's FP16 performance is severely limited at 197.4 GFLOPS (1:64 ratio) versus the RX 6600 LE's 17.88 TFLOPS (2:1), meaning half-precision compute is a non-starter on the Quadro.

Both cards support OpenGL 4.6 and Vulkan 1.4, so API-level compatibility is similar for those standards. However, the RX 6600 LE uses a PCIe 4.0 x8 interface while the Quadro uses PCIe 3.0 x16—the newer standard offers double the per-lane bandwidth, though the Quadro's wider physical connection partially compensates.

Specification Differences

| Specification | AMD Radeon RX 6600 LE | NVIDIA Quadro P6000 |

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

| Process Node | 7 nm | 16 nm |

| Die Size | 237 mm² | 471 mm² |

| Transistor Density | 46.7M / mm² | 25.1M / mm² |

| Base Clock | 1626 MHz | 1506 MHz |

| Boost Clock | 2495 MHz | 1645 MHz |

| Memory Size | 8 GB GDDR6 | 24 GB GDDR5X |

| Memory Bus | 128 bit | 384 bit |

| Memory Bandwidth | 224.0 GB/s | 432.8 GB/s |

| Shading Units | 1792 | 3840 |

| TMUs | 112 | 240 |

| ROPs | 64 | 96 |

| Ray Accelerators | 28 | 0 |

| FP32 Performance | 8.942 TFLOPS | 12.63 TFLOPS |

| FP16 Performance | 17.88 TFLOPS (2:1) | 197.4 GFLOPS (1:64) |

| TDP | 132 W | 250 W |

| Suggested PSU | 300 W | 600 W |

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

| Length | 190 mm (7.5 inches) | 267 mm (10.5 inches) |

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

| Release Date | 2023-12-07 | 2016-09-30 |

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