AMD Radeon Pro Duo vs AMD Radeon RX 480 Comparison

The AMD Radeon Pro Duo and the AMD Radeon RX 480 represent two very different philosophies from the same manufacturer, separated by just two months in their 2016 release windows. The Pro Duo is a dual-GPU professional monster with a 350 W TDP and a launch MSRP of 1,499 USD, while the RX 480 is a mainstream consumer card built on a newer architecture with a 150 W TDP and a launch MSRP of 229 USD. The benchmark data, however, tells a surprisingly close story in raw compute, even as the two cards target completely different workloads and systems.

Head-to-Head Benchmarks

The only direct head-to-head benchmark available in the data is Geekbench OpenCL, and it delivers a notable upset. The Radeon RX 480 scores 37,998 points, while the Radeon Pro Duo scores 35,860 points. That gives the RX 480 a victory with a delta of -5.6% relative to the Pro Duo. In other words, the consumer card outperforms the dual-GPU professional card by 5.6% in this specific OpenCL test. This is a striking result given the Pro Duo’s massive 8,192 TFLOPS of FP32 compute, its 4,096 shading units, and its 512.0 GB/s of memory bandwidth.

The RX 480’s win is likely attributable to software optimization and driver maturity for consumer workloads, as well as the fact that the Pro Duo’s dual-GPU configuration often requires explicit multi-GPU scaling support to reach its theoretical peak. The data shows that in this single test, the scaling either does not materialize or is actively detrimental. The Pro Duo’s 8.192 TFLOPS FP32 figure is identical to its FP16 figure at a 1:1 ratio, which is unusual and suggests the architecture is not optimized for half-precision compute, but that does not explain the OpenCL deficit.

Looking at the broader benchmark landscape, the Pro Duo’s average benchmark score is 35,860, which places it in the 80th percentile of all GPUs. Its nearest rivals include the NVIDIA Quadro GV100 with an average score of 35,520 and a delta of 1%, the NVIDIA GeForce RTX 5070 Ti Mobile at 35,435 with a 1.2% delta, and the NVIDIA T1000 at 36,289 with a -1.2% delta. The Pro Duo is essentially trading blows with these cards, sitting within a 1.8% band of its closest competitors. The RX 480, by contrast, has an average benchmark score of 33,997 across all its tests, placing it in the 78th percentile. Its nearest rivals are the AMD Radeon HD 7950 at 33,951 (0.1% delta), the AMD Radeon RX 560 XT at 34,133 (-0.4% delta), and the AMD Radeon RX 7700S at 33,849 (0.4% delta). The RX 480’s 3,000-point average advantage over the Pro Duo in OpenCL is not reflected in its overall average because its other benchmarks—3DMark Steel Nomad DX12, Geekbench Metal, and Geekbench Vulkan—drag the aggregate down.

Where Each One Wins

The RX 480 wins the only direct comparison test, but the Pro Duo’s hardware specifications suggest where it would dominate in professional rendering and compute scenarios. The Pro Duo has 4,096 shading units, 256 TMUs, and 64 ROPs, versus the RX 480’s 2,304 shading units, 144 TMUs, and 32 ROPs. The Pro Duo also has a 4096-bit memory bus with 512.0 GB/s of bandwidth, compared to the RX 480’s 256-bit bus with 256.0 GB/s. In pixel rate, the Pro Duo hits 64.00 GPixel/s versus the RX 480’s 40.51 GPixel/s, and in texture rate it reaches 256.0 GTexel/s versus 182.3 GTexel/s. For any workload that scales with raw throughput—large texture fetches, high-resolution rendering, or compute-heavy simulations—the Pro Duo has a clear theoretical advantage.

The RX 480, however, counters with architectural efficiency. Its GCN 4.0 architecture on a 14 nm process from GlobalFoundries gives it a transistor density of 24.6M per mm², compared to the Pro Duo’s GCN 3.0 on a 28 nm TSMC process with 14.9M per mm². The RX 480 also has a higher memory clock at 2000 MHz (8 Gbps effective) versus the Pro Duo’s 500 MHz (1000 Mbps effective), though the Pro Duo’s wider bus compensates with double the total bandwidth. The RX 480’s boost clock of 1266 MHz with a base of 1120 MHz is significantly higher than the Pro Duo’s unspecified clocks, which likely helps in latency-sensitive workloads like gaming. The RX 480 also supports Vulkan 1.3, while the Pro Duo is limited to Vulkan 1.2.170, and the RX 480 has newer display outputs with HDMI 2.0b and DisplayPort 1.4a versus the Pro Duo’s HDMI 1.4a and DisplayPort 1.2.

Architecture Differences

The architectural gap is fundamental. The Pro Duo is built on GCN 3.0, a mature design that AMD used in its FirePro line, and it uses a dual-GPU configuration on a single card. The chip, codenamed Capsaicin, is a massive 596 mm² die with 8,900 million transistors. The RX 480, on the other hand, uses GCN 4.0 with a single Ellesmere chip that is just 232 mm² and 5,700 million transistors. The process node difference is significant: 28 nm at TSMC for the Pro Duo versus 14 nm at GlobalFoundries for the RX 480. This explains the transistor density disparity—the RX 480 packs nearly twice as many transistors per square millimeter (24.6M vs 14.9M).

Memory architecture is another major divergence. The Pro Duo uses 4 GB of HBM with a 4096-bit bus, delivering 512.0 GB/s. The RX 480 uses 8 GB of GDDR5 with a 256-bit bus, delivering 256.0 GB/s. The Pro Duo has the bandwidth advantage, but the RX 480 has double the capacity, which matters for modern game textures and large datasets. The Pro Duo’s power delivery reflects its professional intent: it requires 3x 8-pin power connectors and a 750 W suggested PSU, while the RX 480 gets by with a single 6-pin connector and a 450 W PSU. The Pro Duo is also longer at 277 mm versus the RX 480’s 240 mm, and taller at 111 mm versus 95 mm, making it a physically larger card overall.

API support shows generational improvement. Both cards support DirectX 12 (12_0) and OpenGL 4.6, but the RX 480 moves ahead in Vulkan, supporting version 1.3 versus the Pro Duo’s 1.2.170. The RX 480’s display outputs are also newer, with HDMI 2.0b and DisplayPort 1.4a supporting higher refresh rates and resolutions than the Pro Duo’s HDMI 1.4a and DisplayPort 1.2. The Pro Duo compensates with its dual-GPU design, which the RX 480 cannot match in raw multi-tasking or compute throughput, but the RX 480’s single-chip design is simpler and more reliable for consumer use.

FAQ

Q: Which card has higher raw compute performance in the Geekbench OpenCL test?

A: The AMD Radeon RX 480 wins with a score of 37,998, a 5.6% advantage over the AMD Radeon Pro Duo’s 35,860.

Q: How does the Pro Duo’s average benchmark score compare to its closest rivals?

A: The Pro Duo’s average score is 35,860, which is 1% higher than the NVIDIA Quadro GV100 (35,520) and 1.2% higher than the NVIDIA GeForce RTX 5070 Ti Mobile (35,435), but 1.2% lower than the NVIDIA T1000 (36,289).

Q: What are the transistor density differences between the two cards?

A: The RX 480 has a transistor density of 24.6M per mm² on a 232 mm² die, while the Pro Duo has 14.9M per mm² on a 596 mm² die, reflecting the RX 480’s newer 14 nm process versus the Pro Duo’s 28 nm process.

Q: Does the Pro Duo have more memory bandwidth than the RX 480?

A: Yes, the Pro Duo delivers 512.0 GB/s over a 4096-bit HBM bus, while the RX 480 provides 256.0 GB/s over a 256-bit GDDR5 bus.

Q: Which card has better API support for Vulkan?

A: The RX 480 supports Vulkan 1.3, while the Pro Duo is limited to Vulkan 1.2.170.

Q: What is the power consumption difference?

A: The Pro Duo has a 350 W TDP and requires 3x 8-pin connectors with a 750 W PSU, while the RX 480 has a 150 W TDP and uses a single 6-pin connector with a 450 W PSU.

The Verdict

The data points to a clear split based on workload. If the priority is raw compute throughput for professional applications, the AMD Radeon Pro Duo is the obvious choice—its 512.0 GB/s bandwidth, 8.192 TFLOPS FP32, and 256.0 GTexel/s texture rate give it a theoretical edge that the RX 480 cannot match. The Pro Duo’s 80th percentile ranking among all GPUs, with an average score of 35,860, places it firmly in workstation territory, trading blows with the NVIDIA Quadro GV100 and RTX 5070 Ti Mobile.

However, for a consumer or a developer targeting modern APIs and gaming workloads, the AMD Radeon RX 480 is the better pick. It wins the only head-to-head benchmark with a 5.6% margin, supports Vulkan 1.3, has newer display outputs, and offers 8 GB of memory versus the Pro Duo’s 4 GB. Its 78th percentile ranking is only two points lower, and it achieves this with a fraction of the power draw—150 W versus 350 W—and a much smaller physical footprint. The RX 480’s nearest rivals include the RX 560 XT and RX 7700S, all within a 0.5% band, showing it is a solid midrange performer. The Pro Duo’s dual-GPU design is a liability in the one test where they are directly compared, and its end-of-life status with no successor in this data suggests it was a niche product. For anyone who needs professional compute density, the Pro Duo justifies its existence; for everyone else, the RX 480 is the data-backed winner.