AMD Radeon PRO W6800 vs NVIDIA RTX A4500 Comparison

Head-to-Head Benchmarks

The recorded data shows a clear and consistent advantage for the NVIDIA RTX A4500 in the two shared benchmark workloads. In the Geekbench OpenCL test, the RTX A4500 scores 141,837 against the AMD Radeon PRO W6800’s 121,808. That is a 14.1% deficit for the AMD card, a substantial margin in compute-oriented tasks. The Vulkan results follow the same pattern: the RTX A4500 posts 129,980 while the W6800 manages 109,961, a 15.4% gap. Both deltas are significant enough that they are unlikely to be noise; the NVIDIA card wins both recorded head-to-head comparisons outright.

The AMD card does have its own benchmark victories elsewhere in the database, but they are not part of the shared head-to-head suite. The W6800’s Geekbench Metal score is 174,420, which is its strongest single result, and its average benchmark score across all tests is 135,396. That average is notably higher than the RTX A4500’s 91,671, which is dragged down by the inclusion of a 3DMark Steel Nomad DX12 run at 3,196. That DX12 score is far below the Geekbench numbers for the NVIDIA card, creating a wide variance in its aggregate. The W6800 also sits in the 96th percentile of all GPUs, three points above the RTX A4500’s 93rd percentile. So while the head-to-head favors NVIDIA, the overall database percentile places AMD higher.

The nearest rivals provide additional context for each card’s standing. The W6800’s closest competitor is the AMD Radeon Pro W6800X Duo with an average score of 135,774, a 0.3% gap against the W6800. The NVIDIA A10M is nearly identical at 135,230, a 0.1% difference. The RTX 4000 Ada Generation also lands at 135,218, another 0.1% delta. The W6800 is effectively tied with those three cards, but it trails the AMD Radeon PRO V620 by 0.8% (136,472). For the RTX A4500, the nearest rival is the RTX A4500 Mobile at 91,134, a 0.6% lead for the desktop card. The AMD Radeon Instinct MI60 sits 0.9% ahead at 92,466, while the NVIDIA Quadro GP100 and AMD Radeon PRO W7600 are 4.8% and 5.2% behind, respectively.

The two cards are clearly in different performance classes. The RTX A4500 wins the two compute tests that directly compare them, but the W6800 holds a higher overall percentile and a higher average benchmark score across a broader test suite. The database does not list a shared 3DMark result for the W6800, so the RTX A4500’s low Steel Nomad score is not a direct comparison point. Still, the numeric evidence points to the NVIDIA as the faster card in the tests they share, while the AMD has a stronger aggregate profile.

Architecture Differences

The architectural split is fundamental. The AMD Radeon PRO W6800 uses the Navi 21 chip built on RDNA 2.0, fabricated on a 7 nm process at TSMC. The NVIDIA RTX A4500 uses the GA102 die with Ampere architecture, manufactured on an 8 nm process by Samsung. The process nodes differ by one nanometer, but the transistor counts tell a more nuanced story. The NVIDIA chip contains 28,300 million transistors on a 628 mm² die, while the AMD chip has 26,800 million on a 520 mm² die. Transistor density favors AMD: 51.5 million per mm² for the W6800 versus 45.1 million per mm² for the RTX A4500. That density advantage is a direct result of the smaller process node.

The compute layouts diverge sharply. The W6800 uses 3,840 shading units, 240 texture mapping units, and 96 raster operation units. The RTX A4500 packs far more shading units at 7,168, but fewer texturing units at 224, and the same 96 ROPs. The RTX A4500 also brings 224 tensor cores, which the AMD card lacks entirely. For ray tracing, the W6800 has 60 RT cores versus the RTX A4500’s 56. The raw FP32 throughput favors NVIDIA: 23.65 TFLOPS for the RTX A4500 versus 17.83 TFLOPS for the W6800. FP16 performance is where they diverge in approach. The AMD card reaches 35.67 TFLOPS via a 2:1 ratio, while the NVIDIA card stays at 23.65 TFLOPS with a 1:1 ratio. That means the AMD offers double-rate FP16, but the NVIDIA’s FP16 equals its FP32.

The memory subsystem is a study in trade-offs. The W6800 has 32 GB of GDDR6 on a 256-bit bus, yielding 512.0 GB/s of bandwidth. The RTX A4500 has 20 GB of the same GDDR6 type, but on a 320-bit bus, which pushes bandwidth to 640.0 GB/s. The capacities are different, but the NVIDIA has the faster bus. Clock speeds also favor the AMD: the W6800 runs at 1575 MHz base and 2322 MHz boost, while the RTX A4500 runs at 1050 MHz base and 1650 MHz boost. The higher clocks help the AMD close some of the shading-unit gap, but not enough to overcome the NVIDIA’s larger core count.

Power and cooling differ as well. The W6800 has a 250 W TDP, the RTX A4500 a 200 W TDP. Both are dual-slot cards, but the W6800 requires 1x 6-pin and 1x 8-pin connectors, while the RTX A4500 uses a single 8-pin. The suggested power supply is 600 W for the AMD and 550 W for the NVIDIA. The AMD card is physically taller and wider: 120 mm height and 50 mm width, versus 112 mm height for the NVIDIA. Both are 267 mm long. Display outputs differ too: the W6800 has six mini-DisplayPort 1.4a connectors, while the RTX A4500 has four full-size DisplayPort 1.4a ports.

The API support is identical in this database: both cards support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The bus interface is also the same, PCIe 4.0 x16. The production status for both is end-of-life, though the RTX A4500 has a listed successor (Workstation Ada) while the W6800 does not. The release timeline shows the W6800 arrived on June 7, 2021, and the RTX A4500 on November 22, 2021.

The Verdict

The data makes a clear recommendation for users who prioritize the shared compute workloads. The RTX A4500 wins both Geekbench OpenCL and Vulkan tests by double-digit margins, 14.1% and 15.4% respectively. That kind of consistent advantage in general-purpose compute suggests the NVIDIA card is the better choice for tasks that rely on those APIs. The RTX A4500 also has a lower power draw at 200 W versus 250 W, a simpler dual-slot cooler, and a single 8-pin connector, which simplifies system integration. For a workstation that runs OpenCL or Vulkan workloads, the RTX A4500 is the data-backed pick.

The W6800 has its own appeal, but the head-to-head results do not support it in those shared tests. Its 32 GB of memory doubles the RTX A4500’s 20 GB, which matters for data sets that exceed the smaller buffer. The higher transistor density and smaller die also suggest better fabrication efficiency. The W6800 sits in the 96th percentile of all GPUs, above the RTX A4500’s 93rd, and its average benchmark score is higher (135,396 versus 91,671). But that average is dragged down by the NVIDIA’s single 3DMark result, and the head-to-head tests are unambiguous: two losses, zero wins for the AMD.

The choice comes down to workload specifics. If the primary applications use OpenCL or Vulkan, the RTX A4500 is the winning product. If the workloads are Metal-based (the W6800’s best score) or require 32 GB of GDDR6, the W6800 has a valid claim. The RTX A4500 also has tensor cores for workloads that use them, which the AMD cannot match. The data does not support a general-purpose win for the AMD card, only a situational one.

Specification Differences

| Field | AMD Radeon PRO W6800 | NVIDIA RTX A4500 |

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

| Chip | Navi 21 | GA102 |

| Architecture | RDNA 2.0 | Ampere |

| Process node | 7 nm | 8 nm |

| Foundry | TSMC | Samsung |

| Transistors | 26,800 million | 28,300 million |

| Die size | 520 mm² | 628 mm² |

| Base clock | 1575 MHz | 1050 MHz |

| Boost clock | 2322 MHz | 1650 MHz |

| Memory size | 32 GB | 20 GB |

| Memory bus | 256 bit | 320 bit |

| Memory bandwidth | 512.0 GB/s | 640.0 GB/s |

| Shading units | 3840 | 7168 |

| TMUs | 240 | 224 |

| ROPs | 96 | 96 |

| RT cores | 60 | 56 |

| Tensor cores | N/A | 224 |

| FP32 | 17.83 TFLOPS | 23.65 TFLOPS |

| FP16 | 35.67 TFLOPS (2:1) | 23.65 TFLOPS (1:1) |

| Pixel rate | 222.9 GPixel/s | 158.4 GPixel/s |

| Texture rate | 557.3 GTexel/s | 369.6 GTexel/s |

| TDP | 250 W | 200 W |

| Power connectors | 1x 6-pin + 1x 8-pin | 1x 8-pin |

| Suggested PSU | 600 W | 550 W |

| Height | 120 mm | 112 mm |

| Width | 50 mm | Not specified |

| Display outputs | 6x mini-DisplayPort 1.4a | 4x DisplayPort 1.4a |

| Release date | June 7, 2021 | November 22, 2021 |

| Predecessor | Radeon Pro Vega | Quadro Turing |

| Successor | None | Workstation Ada |

FAQ

Q: Which GPU is faster in the Geekbench OpenCL benchmark?

A: The NVIDIA RTX A4500 scores 141,837 versus the AMD Radeon PRO W6800’s 121,808, a 14.1% advantage for the NVIDIA.

Q: How does the Vulkan performance compare?

A: The RTX A4500 also wins that test with 129,980 against the W6800’s 109,961, a 15.4% gap.

Q: Which card has more video memory?

A: The AMD Radeon PRO W6800 has 32 GB of GDDR6, while the NVIDIA RTX A4500 has 20 GB of the same memory type.

Q: What is the difference in power consumption?

A: The W6800 is rated at 250 W TDP with a suggested 600 W PSU, while the RTX A4500 is rated at 200 W TDP with a 550 W PSU suggestion.

Q: Do the cards have different shading unit counts?

A: Yes, the RTX A4500 has 7,168 shading units, while the W6800 has 3,840. The NVIDIA also includes 224 tensor cores, which the AMD lacks.

Q: Which card has a higher overall benchmark percentile?

A: The AMD Radeon PRO W6800 sits in the 96th percentile of all GPUs, while the NVIDIA RTX A4500 sits in the 93rd percentile.