AMD Radeon Pro W6900X vs NVIDIA RTX A4500 Comparison

FAQ

Q: How do the average benchmark scores of the AMD Radeon Pro W6900X and NVIDIA RTX A4500 compare?

A: The AMD Radeon Pro W6900X has an average benchmark score of 168,574, while the NVIDIA RTX A4500 scores 91,671. This places the AMD part in the 97th percentile of all GPUs, versus the 93rd percentile for the NVIDIA card.

Q: Which GPU wins in Geekbench OpenCL?

A: The NVIDIA RTX A4500 wins in Geekbench OpenCL with a score of 141,837, which is 8.3% higher than the AMD Radeon Pro W6900X score of 130,035.

Q: Which GPU wins in Geekbench Vulkan?

A: The AMD Radeon Pro W6900X wins in Geekbench Vulkan with a score of 148,865, which is 14.5% higher than the NVIDIA RTX A4500 score of 129,980.

Q: What are the memory capacities of each card?

A: The AMD Radeon Pro W6900X has 32 GB of GDDR6 memory on a 256-bit bus, while the NVIDIA RTX A4500 has 20 GB of GDDR6 memory on a 320-bit bus. The NVIDIA card has higher memory bandwidth at 640.0 GB/s versus 512.0 GB/s for the AMD card.

Q: How do the thermal design power (TDP) figures differ?

A: The AMD Radeon Pro W6900X has a TDP of 300 W with a suggested PSU of 700 W, while the NVIDIA RTX A4500 has a TDP of 200 W with a suggested PSU of 550 W.

Q: What is the production status of each GPU?

A: Both the AMD Radeon Pro W6900X and the NVIDIA RTX A4500 are listed as end-of-life products in the database.

Architecture Differences

The AMD Radeon Pro W6900X is built on the Navi 21 chip using RDNA 2.0 architecture, manufactured on a 7 nm process at TSMC. The die contains 26,800 million transistors across a 520 mm² area, yielding a transistor density of 51.5M per mm². The NVIDIA RTX A4500 uses the GA102 chip with Ampere architecture, fabricated on an 8 nm process at Samsung. Its die holds 28,300 million transistors on a larger 628 mm² area, resulting in a lower density of 45.1M per mm².

The AMD card features 5,120 shading units, 320 texture mapping units, and 128 ROPs, along with 80 ray tracing cores. The NVIDIA card has a higher count of 7,168 shading units but fewer texture units at 224 and ROPs at 96. The RTX A4500 includes 56 RT cores and 224 tensor cores, a feature entirely absent from the AMD specification. This tensor core presence indicates the NVIDIA card is designed with AI and compute workloads in mind, while the AMD card relies on its higher raw shading throughput.

Clock speeds differ substantially. The AMD Radeon Pro W6900X has a base clock of 1825 MHz and a boost clock of 2171 MHz, while the NVIDIA RTX A4500 operates at a lower 1050 MHz base and 1650 MHz boost. This clock advantage helps the AMD card achieve higher pixel and texture rates: 277.9 GPixel/s and 694.7 GTexel/s, respectively, versus 158.4 GPixel/s and 369.6 GTexel/s for the NVIDIA card. In floating-point performance, the AMD card delivers 22.23 TFLOPS FP32 and 44.46 TFLOPS FP16 (2:1 ratio), while the NVIDIA card delivers 23.65 TFLOPS for both FP32 and FP16 (1:1 ratio).

Memory architecture also diverges. The AMD card uses 32 GB of GDDR6 on a 256-bit bus with 512.0 GB/s bandwidth. The NVIDIA card uses 20 GB of GDDR6 on a wider 320-bit bus, achieving 640.0 GB/s bandwidth. Both cards run memory at 2000 MHz with 16 Gbps effective speed.

The bus interface is another major difference. The AMD Radeon Pro W6900X uses Apple MPX, while the NVIDIA RTX A4500 uses PCIe 4.0 x16. Display outputs also differ: the AMD card provides 1x HDMI 2.1 and 4x Thunderbolt, whereas the NVIDIA card provides 4x DisplayPort 1.4a. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Physical dimensions show the AMD card is 267 mm long and 120 mm high, while the NVIDIA card is also 267 mm long but 112 mm high. The NVIDIA card is dual-slot with a single 8-pin power connector; the AMD card has no specified slot width or power connector in the database.

The Verdict

The data presents a split decision. The AMD Radeon Pro W6900X holds a clear advantage in overall average benchmark score, 168,574 versus 91,671, and sits in the 97th percentile of all GPUs compared to the 93rd percentile for the NVIDIA RTX A4500. This is driven largely by the AMD card's superior raw throughput metrics: higher pixel rate, higher texture rate, and twice the memory capacity at 32 GB versus 20 GB.

However, the NVIDIA RTX A4500 wins the only OpenCL benchmark recorded, scoring 141,837 against 130,035, an 8.3% margin. This suggests that in OpenCL-based workloads, the NVIDIA card's higher FP32 throughput (23.65 TFLOPS versus 22.23 TFLOPS) and tensor core capabilities provide a measurable benefit. The AMD card counters with a 14.5% win in Vulkan, scoring 148,865 versus 129,980.

For users prioritizing raw compute in OpenCL, the NVIDIA RTX A4500 is the stronger choice, especially given its lower TDP of 200 W versus 300 W. For users who need maximum memory capacity (32 GB), higher pixel and texture rates, and Vulkan performance, the AMD Radeon Pro W6900X is the better fit. The AMD card also has a higher nearest rival score, sitting 1.5% above the NVIDIA RTX 4500 Ada Generation, while the NVIDIA card's nearest rival is the RTX A4500 Mobile at just 0.6% difference.

The RTX A4500 also benefits from a wider memory bus (320-bit versus 256-bit) and higher bandwidth (640.0 GB/s versus 512.0 GB/s), which may favor bandwidth-sensitive workloads. The AMD card's higher transistor density (51.5M / mm² versus 45.1M / mm²) reflects a more modern process node (7 nm versus 8 nm), potentially influencing efficiency despite the higher TDP.

Specification Differences

| Specification | AMD Radeon Pro W6900X | 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 |

| Transistor Density | 51.5M / mm² | 45.1M / mm² |

| Base Clock | 1825 MHz | 1050 MHz |

| Boost Clock | 2171 MHz | 1650 MHz |

| Memory Size | 32 GB | 20 GB |

| Memory Bus Width | 256 bit | 320 bit |

| Memory Bandwidth | 512.0 GB/s | 640.0 GB/s |

| Shading Units | 5120 | 7168 |

| Texture Mapping Units | 320 | 224 |

| ROPs | 128 | 96 |

| RT Cores | 80 | 56 |

| Tensor Cores | None | 224 |

| Pixel Rate | 277.9 GPixel/s | 158.4 GPixel/s |

| Texture Rate | 694.7 GTexel/s | 369.6 GTexel/s |

| FP32 | 22.23 TFLOPS | 23.65 TFLOPS |

| FP16 | 44.46 TFLOPS (2:1) | 23.65 TFLOPS (1:1) |

| TDP | 300 W | 200 W |

| Suggested PSU | 700 W | 550 W |

| Bus Interface | Apple MPX | PCIe 4.0 x16 |

| Display Outputs | 1x HDMI 2.1, 4x Thunderbolt | 4x DisplayPort 1.4a |

| Dimensions (H) | 120 mm | 112 mm |

Head-to-Head Benchmarks

The recorded head-to-head benchmarks show a single win for each card, making the comparison a tie in direct tests.

In Geekbench OpenCL, the NVIDIA RTX A4500 takes the lead with a score of 141,837, outperforming the AMD Radeon Pro W6900X's 130,035 by 8.3%. This result aligns with the NVIDIA card's higher FP32 compute (23.65 TFLOPS versus 22.23 TFLOPS) and the presence of 224 tensor cores, which can accelerate certain OpenCL workloads. The margin is moderate but consistent, suggesting that the NVIDIA architecture extracts more performance from OpenCL frameworks despite having a lower base clock and fewer texture units.

In Geekbench Vulkan, the AMD Radeon Pro W6900X reverses the result with a score of 148,865 against 129,980, a 14.5% advantage. This is a more substantial margin than the OpenCL difference, indicating that the AMD card's RDNA 2.0 architecture handles Vulkan rendering more efficiently. The AMD card's higher boost clock (2171 MHz versus 1650 MHz) and higher pixel rate (277.9 GPixel/s versus 158.4 GPixel/s) likely contribute to this outcome, as Vulkan workloads often benefit from higher fill rates and clock speeds.

Beyond the direct head-to-head tests, the overall average benchmark score heavily favors the AMD card. The W6900X averages 168,574, which is 83.9% higher than the RTX A4500's 91,671. This gap is driven by the AMD card's placement in the 97th percentile, while the NVIDIA card sits in the 93rd percentile. The AMD card's nearest rival is the NVIDIA RTX 4500 Ada Generation with an average score of 166,094, just 1.5% lower. The NVIDIA RTX A4500's nearest rival is the RTX A4500 Mobile at 91,134, only 0.6% lower, indicating that the desktop A4500 is closely matched by its mobile counterpart.

The AMD card also shows a stronger position relative to its rivals. Its nearest rivals include the RTX 4500 Ada Generation (1.5% behind), RTX A5500 (2% behind), and Radeon PRO W7800 (2.2% behind). The NVIDIA card's nearest rivals include the AMD Radeon Instinct MI60, which is actually 0.9% ahead of it, and the Quadro GP100 at 4.8% behind. This suggests the AMD card competes at a higher performance tier than the NVIDIA card, despite losing the OpenCL test.

In terms of memory bandwidth, the NVIDIA card's 640.0 GB/s exceeds the AMD card's 512.0 GB/s by 25%, which may explain its OpenCL advantage in memory-intensive operations. However, the AMD card's larger memory pool (32 GB versus 20 GB) provides capacity advantages for large datasets, even if the bandwidth is lower. The AMD card's FP16 performance (44.46 TFLOPS) is nearly double its FP32 output, while the NVIDIA card delivers equal FP16 and FP32 (23.65 TFLOPS), a difference that could matter in mixed-precision workloads.