AMD Radeon PRO W6400 vs NVIDIA T550 Mobile Comparison

Where Each One Wins

The benchmark data splits the two workstation GPUs cleanly. The AMD Radeon PRO W6400 takes the Vulkan compute test decisively, while the NVIDIA T550 Mobile wins the OpenCL test. In the recorded Geekbench runs, the AMD card scores 39,286 in Vulkan against 30,801 for the NVIDIA card, a 27.5% advantage. The NVIDIA card returns the favor in OpenCL, scoring 35,521 versus 35,027 for the AMD, a 1.4% lead. The average benchmark score across both tests lands at 37,157 for the AMD Radeon PRO W6400 and 33,161 for the NVIDIA T550 Mobile, which places the AMD part in the 80th percentile of all GPUs in the database, while the NVIDIA part sits in the 77th percentile. These are entry-level professional mobile workstation parts, and the data shows a split decision. The AMD card is the pick for Vulkan workloads, and the NVIDIA card is the pick for OpenCL compute. Neither card is a universal winner, which makes the choice depend entirely on the software stack the user targets.

Architecture Differences

The two cards come from different design lineages. The AMD Radeon PRO W6400 is built on the Navi 24 chip with RDNA 2.0 architecture, fabricated on a 6 nm process at TSMC. It integrates 5,400 million transistors on a 107 mm² die, for a transistor density of 50.5 million per square millimeter. The NVIDIA T550 Mobile uses the TU117 chip, a Turing architecture part built on a 12 nm process at TSMC. It packs 4,700 million transistors onto a 200 mm² die, a density of 23.5 million per square millimeter.

The AMD part has 768 shading units, 48 texture mapping units, and 32 ROPs. It includes 12 ray tracing cores but no tensor cores. The NVIDIA part offers 1,024 shading units, 64 TMUs, and 32 ROPs. It has no ray tracing cores and no tensor cores. The AMD card has 4 GB of GDDR6 memory across a 64 bit bus, delivering 128.0 GB/s of bandwidth. The NVIDIA card also has 4 GB of GDDR6 memory on a 64 bit bus, but its bandwidth is lower at 96.00 GB/s. The AMD clocks boost up to 2321 MHz with the base clock at 2039 MHz and memory at 2000 MHz (16 Gbps effective). The NVIDIA boosts to 1665 MHz with a 1065 MHz base and memory at 1500 MHz (12 Gbps effective). Raw shader throughput also favors AMD. The Radeon PRO W6400 is rated for 3.565 TFLOPS FP32 and 7.130 TFLOPS FP16 (2:1). The NVIDIA T550 is rated at 3.410 TFLOPS FP32 and 6.820 TFLOPS FP16 (2:1). The pixel throughput is also higher on the AMD card: 74.27 GPixel/s versus 53.28 GPixel/s. The texture fill rate is similarly one-sided at 111.4 GTexel/s versus 106.6 GTexel/s.

The Verdict

The recorded data leads to a clear if narrow recommendation. Choose the AMD Radeon PRO W6400 when the workload is built around Vulkan rendering or any API where the AMD card's 27.5% lead in the Vulkan test translates to real performance. It also has a higher memory bandwidth, more TMUs, and more ROPs, which helps in geometry-heavy scenes. Choose the NVIDIA T550 Mobile when the primary task is OpenCL compute. The NVIDIA part wins the Geekbench OpenCL test, and its lower 1.4% margin is within run-to-run variance, but the trend in the data is consistent. The T550 also has a much lower 23 W TDP, which is an advantage in compact systems, and supports a wide range of display outputs that are portable device dependent. The AMD card has no power connectors and relies on slot power alone, with a suggested 250 W power supply. The NVIDIA part also uses no external power connectors and runs on PCIe slot power. The bus interfaces are another split: the AMD runs PCIe 4.0 x4, while the NVIDIA runs PCIe 3.0 x16.

FAQ

Q: Which card wins in raw compute, the AMD W6400 or the NVIDIA T550?

A: The AMD Radeon PRO W6400 has a higher FP32 rating at 3.565 TFLOPS versus 3.410 TFLOPS for the NVIDIA T550 Mobile. The AMD card also wins in FP16 compute at 7.130 TFLOPS versus 6.820 TFLOPS.

Q: Is the NVIDIA T550 Mobile faster in any benchmark?

A: Yes, the NVIDIA T550 Mobile wins the Geekbench OpenCL test. The AMD card scores 35,027, the NVIDIA card scores 35,521, which is a 0.9% lead.

Q: Which card has more memory bandwidth?

A: The AMD Radeon PRO W6400 has a memory bandwidth of 128.0 GB/s, while the NVIDIA T550 Mobile has 96.00 GB/s. The AMD card leads by exactly 25% in this metric.

Q: Do both cards support ray tracing?

A: No. Neither the AMD Radeon PRO W6400 nor the NVIDIA T550 Mobile has ray tracing cores in their specification. Both are rasterization-only parts.

Q: Are the cards the same physical size?

A: The data does not list dimensions for either card. Both are shown as occupying one slot width, but length, height, and width are not recorded.

Q: Which card is more power efficient?

A: The NVIDIA T550 Mobile has a 23 W TDP, while the AMD Radeon PRO W6400 shows a 50 W TDP. The NVIDIA part is more than half the power budget, which matters in compact systems.

Head-to-Head Benchmarks

The Geekbench OpenCL run is the NVIDIA T550's biggest win. The NVIDIA card scores 35,521 versus 35,027 for the AMD Radeon PRO W6400, a 1.4% margin. The database's nearest rivals bracket the two: the AMD Radeon RX Vega 56 at 37,507 and the NVIDIA Tesla P4 at 37,628, the latter two being essentially at parity with the AMD card. The NVIDIA GeForce RTX 4070 also sits close at 37,648. On the opposite side, the NVIDIA GeForce GTX TITAN X is 1.7% behind with 36,530. The AMD card sits in a dense cluster of results, and the 1.4% delta here is within the noise of the system.

The Vulkan test is where the AMD Radeon PRO W6400 takes a decisive lead. AMD scores 39,286 versus 30,801 for NVIDIA, a 27.5% difference. This is a substantial, repeatable margin, not a run-to-run artifact. The AMD part's 27.5% Geekbench advantage in Vulkan is the largest single benchmark delta recorded between these two cards, and it matches the architectural advantage of the Navi 24 part: more TMUs and more shading units in a newer design. The NVIDIA T550 has no answer to this in the recorded data.

The rest of the specifications line up in a predictable way. Both cards use 4 GB of GDDR6 memory, but the AMD card's 128-bit memory bus provides 128.0 GB/s of bandwidth, while the NVIDIA's 64-bit bus provides 96.00 GB/s. The AMD card has 768 shaders, 48 TMUs and 32 ROPs; NVIDIA has 1024 shaders, 64 TMUs and 16 ROPs. Both have no tensor cores. The AMD is built on a newer 6nm process versus 12nm for NVIDIA, and the AMD's higher transistor density (50.5M / mm² versus 23.5M / mm²) confirms the architectural difference. The AMD part has 12 ray tracing cores, and the NVIDIA part has no ray tracing cores. These are internal details, but they explain the benchmark split.

Specification Differences

| Field | AMD Radeon PRO W6400 | NVIDIA T550 Mobile |

|---|---|

| Chip | Navi 24 | TU117 |

| Architecture | RDNA 2.0 | Turing |

| Process | 6 nm | 12 nm |

| Transistors | 5,400 million | 4,700 million |

| Die size | 107 mm² | 200 mm² |

| Transistor density | 50.5M / mm² | 23.5M / mm² |

| Base clock | 2039 MHz | 1065 MHz |

| Boost clock | 2321 MHz | 1665 MHz |

| Memory clock | 2000 MHz (16 Gbps effective) | 1500 MHz (12 Gbps effective) |

| Memory size | 4 GB | 4 GB |

| Memory type | GDDR6 | GDDR6 |

| Memory bus | 64 bit | 64 bit |

| Bandwidth | 128.0 GB/s | 96.00 GB/s |

| Shading units | 768 | 1024 |

| TMUs | 48 | 64 |

| ROPs | 32 | 16 |

| Ray tracing cores | 12 | 0 |

| Pixel rate | 74.27 GPixel/s | 53.28 GPixel/s |

| Texture rate | 111.4 GTexel/s | 106.6 GTexel/s |

| FP32 | 3.564 TFLOPS | 3.410 TFLOPS |

| FP16 | 7.130 TFLOPS (2:1) | 6.820 TFLOPS (2:1) |

| TDP | 50 W | 23 W |

| Slot width | Single-slot | Single-slot |

| Power connectors | None | None |

| Suggested PSU | 250 W | Not listed |

| Bus interface | PCIe 4.0 x4 | PCIe 3.0 x16 |

| Display outputs | 2x DisplayPort 1.4a | Portable Device Dependent |

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

| OpenGL | 4.6 | 4.6 |

| Vulkan | 1.4 | 1.4 |

| Production status | End-of-life | End-of-life |

| Release date | 2022-01-18 | Not recorded |

| Predecessor | Radeon Pro Vega | Quadro Pascal-M |

| Successor | None | Ampere-MW |