AMD Radeon Pro Vega II Duo vs NVIDIA GeForce RTX 5090 Comparison

The AMD Radeon Pro Vega II Duo and NVIDIA GeForce RTX 5090 represent two vastly different eras of GPU design, and the benchmark data reflects that chasm. The RTX 5090 is the decisive winner in every direct comparison available, with the only question being the magnitude of its victory. In the two shared head-to-head tests, the NVIDIA card leads by 70.6% and 73.6% respectively, making the Vega II Duo a legacy product that cannot compete on raw compute. However, the AMD card's unique positioning as a dual-GPU Mac Pro module with 32 GB of HBM2 memory means it still holds relevance in specific, narrow workstation contexts, even if its performance is now firmly in the past.

Where Each One Wins

The RTX 5090 wins everywhere that raw compute throughput is the primary requirement. In Geekbench OpenCL, it scores 334,370 versus the Vega II Duo's 98,432, a 70.6% advantage that demonstrates its dominance in general-purpose compute workloads. The Vulkan gap is even wider: 376,728 versus 99,296, a 73.6% lead that shows the Blackwell architecture's superior efficiency in modern graphics APIs. The RTX 5090 also brings dedicated hardware that the AMD card completely lacks: 170 ray tracing cores and 680 tensor cores, enabling features that the Vega II Duo cannot accelerate at all.

The Vega II Duo's only conceivable wins are in legacy compatibility and specific Mac-centric workflows. Its Apple MPX bus interface and Thunderbolt display outputs are designed for the Mac Pro ecosystem, whereas the RTX 5090 uses PCIe 5.0 x16 and standard display connectors. The AMD card also has a higher percentile ranking among all GPUs at 94, compared to the RTX 5090's 92, though this reflects the averaging of different benchmark suites rather than direct performance. The Vega II Duo's 32 GB of HBM2 memory matches the RTX 5090's 32 GB of GDDR7, but the older memory type operates at 1.02 TB/s bandwidth versus 1.79 TB/s for the newer card.

Architecture Differences

The architectural divide is generational. The Vega II Duo uses the Vega 20 chip built on GCN 5.1, a 7 nm design from TSMC with 13,230 million transistors on a 331 mm² die. The RTX 5090 uses the GB202 chip on Blackwell 2.0, manufactured on a 5 nm process with 92,200 million transistors on a 750 mm² die. Transistor density tells the story: the NVIDIA chip packs 122.9 million transistors per mm², while the AMD chip manages only 40.0 million per mm². This density advantage allows the RTX 5090 to field 21,760 shading units, 680 texture mapping units, and 176 ROPs, versus the Vega II Duo's 4,096 shading units, 256 TMUs, and 64 ROPs.

Clock speeds and compute rates follow the same pattern. The RTX 5090 boosts to 2407 MHz, well above the Vega II Duo's 1720 MHz boost. The NVIDIA card delivers 104.8 TFLOPS of FP32 performance, a 7.4x improvement over the AMD card's 14.09 TFLOPS. FP16 performance shows a similar disparity: 104.8 TFLOPS at a 1:1 ratio versus 28.18 TFLOPS at a 2:1 ratio. The RTX 5090 also has a significantly higher texture rate at 1,636.8 GTexel/s versus 440.3 GTexel/s, and a pixel rate of 423.6 GPixel/s versus 110.1 GPixel/s.

Memory architecture diverges sharply. Both cards have 32 GB, but the Vega II Duo uses HBM2 on a 4096-bit bus, while the RTX 5090 uses GDDR7 on a 512-bit bus. The NVIDIA card achieves 1.79 TB/s bandwidth, nearly double the Vega II Duo's 1.02 TB/s. The RTX 5090 also supports DirectX 12 Ultimate (12_2) and Vulkan 1.4, while the AMD card is limited to DirectX 12 (12_1) and Vulkan 1.3. Both support OpenGL 4.6.

Head-to-Head Benchmarks

The two available head-to-head results leave no ambiguity. In Geekbench OpenCL, the RTX 5090 scores 334,370 against the Vega II Duo's 98,432, a delta of -70.6% for the AMD card. This means the NVIDIA GPU completes the same OpenCL workload roughly 3.4 times faster. The score gap is so large that it cannot be attributed to driver optimization or test variance; it reflects a fundamental compute throughput advantage.

Geekbench Vulkan shows an even larger gap. The RTX 5090 scores 376,728, while the Vega II Duo manages 99,296, a delta of -73.6%. Vulkan's lower overhead and better multi-threading favor the newer architecture, and the RTX 5090's 21,760 shading units simply overwhelm the Vega II Duo's 4,096. The NVIDIA card also has higher boost clocks and more efficient memory bandwidth utilization, factors that compound in compute-heavy Vulkan workloads.

For context, the Vega II Duo's average benchmark score across all tests is 106,750, which places it in the 94th percentile of all GPUs. Its nearest rival is the AMD Radeon Pro W6600X at -0.6% delta, showing that it performs comparably to other high-end AMD workstation cards of its era. The RTX 5090's average score is 79,842, but this is dragged down by its inclusion of PassMark tests where it scores relatively low (e.g., 226 in DirectX 10, 185 in DirectX 12). Its nearest rivals include the NVIDIA Tesla P100 PCIe 16 GB at +0.3% delta, indicating that its average is not representative of its peak compute capability.

FAQ

Q: Which card has more raw compute power?

A: The RTX 5090 delivers 104.8 TFLOPS of FP32 performance versus the Vega II Duo's 14.09 TFLOPS, a 7.4x advantage. It also leads in texture rate (1,636.8 GTexel/s versus 440.3 GTexel/s) and pixel rate (423.6 GPixel/s versus 110.1 GPixel/s).

Q: What are the memory bandwidth differences?

A: The RTX 5090 offers 1.79 TB/s from 32 GB of GDDR7 on a 512-bit bus. The Vega II Duo provides 1.02 TB/s from 32 GB of HBM2 on a 4096-bit bus. The NVIDIA card's bandwidth advantage is roughly 75%.

Q: Does the Vega II Duo have ray tracing or tensor cores?

A: No. The AMD card's specifications list no RT cores and no tensor cores. The RTX 5090 includes 170 ray tracing cores and 680 tensor cores, enabling hardware-accelerated ray tracing and AI workloads.

Q: How do their API supports differ?

A: The RTX 5090 supports DirectX 12 Ultimate (12_2) and Vulkan 1.4, while the Vega II Duo is limited to DirectX 12 (12_1) and Vulkan 1.3. Both support OpenGL 4.6.

Q: What explains the RTX 5090's lower percentile rank despite higher performance?

A: The RTX 5090 ranks in the 92nd percentile versus the Vega II Duo's 94th. This is because the RTX 5090's average benchmark score of 79,842 includes low-scoring PassMark tests (e.g., 185 in DirectX 12), while the Vega II Duo's average of 106,750 is based on three Geekbench tests where it scores consistently high relative to its era.

Q: Which card has a higher boost clock?

A: The RTX 5090 boosts to 2407 MHz, compared to the Vega II Duo's 1720 MHz. The NVIDIA card also has a higher base clock at 2017 MHz versus 1400 MHz.

The Verdict

The data supports only one conclusion for general-purpose computing: the RTX 5090 is overwhelmingly superior. Its 70.6% lead in OpenCL and 73.6% lead in Vulkan are decisive, and its architectural advantages in shading units, clock speeds, and memory bandwidth leave no room for the Vega II Duo to compete in modern workloads. The NVIDIA card also offers ray tracing and tensor cores, features that the AMD card cannot match.

The Vega II Duo's only remaining justification is its specific design for Apple's Mac Pro, with its MPX bus interface and Thunderbolt outputs. For users locked into that ecosystem who need 32 GB of HBM2 memory and cannot migrate to a different platform, the Vega II Duo remains functionally relevant. Its 94th percentile ranking among all GPUs shows it was a high performer in its time, but that time has passed. The RTX 5090's 92nd percentile ranking understates its true capability because of the averaging of diverse benchmark scores.

For any workload that can run on either card, the RTX 5090 is the only rational choice. Its 104.8 TFLOPS FP32, 1.79 TB/s bandwidth, and 2407 MHz boost clock are in a different class entirely. The Vega II Duo is an end-of-life product with a 475 W TDP and quad-slot footprint, while the RTX 5090 is an active product with a 575 W TDP in a dual-slot design. Even the launch MSRP of 1,999 USD for the RTX 5090 versus 4,399 USD for the Vega II Duo underscores the generational leap in efficiency and performance.

Specification Differences

| Specification | AMD Radeon Pro Vega II Duo | NVIDIA GeForce RTX 5090 |

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

| Chip | Vega 20 | GB202 |

| Architecture | GCN 5.1 | Blackwell 2.0 |

| Process Node | 7 nm | 5 nm |

| Transistors | 13,230 million | 92,200 million |

| Die Size | 331 mm² | 750 mm² |

| Base Clock | 1400 MHz | 2017 MHz |

| Boost Clock | 1720 MHz | 2407 MHz |

| Memory Type | HBM2 | GDDR7 |

| Memory Bus | 4096 bit | 512 bit |

| Memory Bandwidth | 1.02 TB/s | 1.79 TB/s |

| Shading Units | 4096 | 21760 |

| TMUs | 256 | 680 |

| ROPs | 64 | 176 |

| RT Cores | None | 170 |

| Tensor Cores | None | 680 |

| Pixel Rate | 110.1 GPixel/s | 423.6 GPixel/s |

| Texture Rate | 440.3 GTexel/s | 1,636.8 GTexel/s |

| FP32 Performance | 14.09 TFLOPS | 104.8 TFLOPS |

| FP16 Performance | 28.18 TFLOPS (2:1) | 104.8 TFLOPS (1:1) |

| TDP | 475 W | 575 W |

| Slot Width | Quad-slot | Dual-slot |

| Power Connectors | None listed | 1x 16-pin |

| Suggested PSU | 850 W | 950 W |

| Bus Interface | Apple MPX | PCIe 5.0 x16 |

| Display Outputs | 1x HDMI 2.0b, 4x Thunderbolt | 1x HDMI 2.1b, 3x DisplayPort 2.1b |

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

| Vulkan Support | 1.3 | 1.4 |

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

| Release Date | 2019-06-02 | 2025-01-29 |