AMD Radeon Pro Vega 48 vs AMD Radeon RX 6900 XT Comparison

The AMD Radeon Pro Vega 48 and the AMD Radeon RX 6900 XT occupy distant corners of the GPU landscape. The Pro Vega 48 is an integrated, end-of-life mobile workstation part built on older GCN architecture, while the RX 6900 XT is a triple-slot, high-power desktop flagship from the RDNA 2 generation. The benchmark data shows a clear hierarchy, but each card has a specific purpose that goes beyond raw score comparisons.

Where Each One Wins

The RX 6900 XT wins every single benchmark in the head-to-head comparison, taking all three tests with decisive margins. Its dominance is absolute in raw compute and graphics performance, making it the obvious choice for any task where rendering speed is the priority. The data shows the Pro Vega 48 wins zero direct comparisons, but that does not make it irrelevant. Its strength lies in its form factor and power characteristics, not its benchmark scores. The Pro Vega 48 is an integrated GPU (IGP) with no power connectors and a portable-device-dependent display output, meaning it is designed for Apple Mac systems where discrete graphics are not an option. The RX 6900 XT, by contrast, requires a 300 W TDP, a 700 W suggested PSU, and two 8-pin connectors, making it a card for a full-size desktop with serious power delivery. In a use-case split, the RX 6900 XT wins on every metric of speed, while the Pro Vega 48 wins on integration simplicity and system compatibility with its host device.

Architecture Differences

These two GPUs are generations apart in design philosophy. The Pro Vega 48 uses the Vega 10 chip built on a 14 nm process at GlobalFoundries, with a die size of 495 mm² and 12,500 million transistors. This gives it a transistor density of 25.3M per mm². It operates on the GCN 5.0 architecture, a design that prioritizes raw throughput over efficiency. The RX 6900 XT uses the Navi 21 chip on a 7 nm process at TSMC, with a slightly larger die at 520 mm² but more than double the transistors at 26,800 million. Its transistor density of 51.5M per mm² is more than double that of the older chip, reflecting the manufacturing advantage of the newer node. The RX 6900 XT runs on RDNA 2.0, which brings architectural improvements in instruction scheduling and cache hierarchy. The most significant difference is the inclusion of 80 ray tracing cores on the RX 6900 XT, a feature entirely absent from the Pro Vega 48. The RX 6900 XT also supports DirectX 12 Ultimate (12_2) and Vulkan 1.4, while the Pro Vega 48 is limited to DirectX 12 (12_1) and Vulkan 1.3. Both cards support OpenGL 4.6, but the RX 6900 XT’s feature set is clearly aimed at modern gaming and compute workloads that leverage hardware ray tracing.

Head-to-Head Benchmarks

The benchmark results are one-sided, but the margins tell a story about scaling. In Geekbench Metal, the RX 6900 XT scores 177,021 against the Pro Vega 48’s 69,010, a delta of -61%. This is the closest of the three tests, suggesting that Metal performance scales somewhat differently than other APIs. The gap widens in Geekbench OpenCL, where the RX 6900 XT hits 187,673 versus 53,757, a -71.4% delta. This is the largest relative difference in the set, indicating that the RX 6900 XT’s compute architecture is far more efficient at handling OpenCL workloads. Geekbench Vulkan shows a similar pattern: the RX 6900 XT scores 148,525, while the Pro Vega 48 manages 57,653, a -61.2% delta. The average benchmark scores reflect this disparity, with the Pro Vega 48 averaging 60,140 across all tests and the RX 6900 XT averaging 50,951. The RX 6900 XT’s average is lower than its Geekbench results because it includes a wider range of tests, including Passmark DX10, DX11, DX12, and DX9 scores that are far lower in absolute terms. The Pro Vega 48 has no Passmark scores in the data, so its average is skewed by its three Geekbench results alone. Looking at the nearest rivals, the Pro Vega 48’s average score of 60,140 places it just 0.3% below the NVIDIA GeForce RTX 4090 and the Intel Arc Pro A60, which both average around 60,300. It is 2.5% ahead of the AMD Radeon PRO V710 and 2.8% ahead of the NVIDIA P102-100. The RX 6900 XT’s average of 50,951 is 1.6% below the NVIDIA CMP 50HX, 1.9% above the AMD Radeon RX Vega 64, and 2% above the NVIDIA GeForce RTX 5070 Ti. This puts the RX 6900 XT in a different competitive bracket, trading blows with cards that are far more recent.

FAQ

Q: Which card is faster in Geekbench Metal?

A: The AMD Radeon RX 6900 XT is significantly faster, scoring 177,021 compared to the Pro Vega 48’s 69,010, a 61% advantage.

Q: Does the Pro Vega 48 win any benchmark against the RX 6900 XT?

A: No. The head-to-head data shows the RX 6900 XT winning all three tests (Geekbench Metal, OpenCL, and Vulkan), with the Pro Vega 48 recording zero wins.

Q: What is the architectural generation gap between the two cards?

A: The Pro Vega 48 is built on GCN 5.0 with a 14 nm process, while the RX 6900 XT uses RDNA 2.0 on a 7 nm process. The RX 6900 XT also adds 80 ray tracing cores, which the Pro Vega 48 lacks entirely.

Q: How do their memory subsystems compare?

A: The Pro Vega 48 has 8 GB of HBM2 memory on a 2048-bit bus, delivering 402.4 GB/s bandwidth. The RX 6900 XT has 16 GB of GDDR6 memory on a 256-bit bus, delivering 512.0 GB/s bandwidth.

Q: What are the power requirements for each card?

A: The RX 6900 XT has a 300 W TDP, requires a 700 W suggested PSU, and uses two 8-pin power connectors. The Pro Vega 48 has no TDP listed, no power connectors, and is an integrated GPU, meaning it draws power from the host system.

Q: Which card has a higher percentile ranking among all GPUs?

A: The Pro Vega 48 ranks in the 88th percentile, while the RX 6900 XT ranks in the 86th percentile. Despite the RX 6900 XT’s higher raw scores, the Pro Vega 48’s average benchmark score is higher because it is only measured on Geekbench tests.

The Verdict

The choice between these two cards comes down to the system they are going into. If you are building or upgrading a desktop PC with a standard power supply and space for a triple-slot card, the RX 6900 XT is the clear winner. Its 16 GB of VRAM, 512.0 GB/s bandwidth, and 23.04 TFLOPS of FP32 performance make it a far more capable card for gaming and compute. The data shows it is 61-71% ahead in every Geekbench test, and it supports modern APIs like DirectX 12 Ultimate and Vulkan 1.4 with hardware ray tracing. The RX 6900 XT’s launch MSRP is 999 USD, which is a premium price for a premium part. If you are working with a Mac system that requires an integrated GPU, the Pro Vega 48 is the only option in this comparison. It has no power connectors, no slot width, and its display outputs are dependent on the portable device it is installed in. Its 8 GB of HBM2 memory on a 2048-bit bus gives it a respectable 402.4 GB/s of bandwidth, and its 88th percentile ranking shows it is not a weak part in absolute terms. It is just outclassed by the RX 6900 XT in every measurable way. The RX 6900 XT is for users who need maximum performance and have the power delivery and physical space to support it. The Pro Vega 48 is for users who need a capable GPU in a tightly integrated system where discrete graphics are impossible.

Specification Differences

| Specification | AMD Radeon Pro Vega 48 | AMD Radeon RX 6900 XT |

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

| Architecture | GCN 5.0 | RDNA 2.0 |

| Process Node | 14 nm | 7 nm |

| Foundry | GlobalFoundries | TSMC |

| Transistors | 12,500 million | 26,800 million |

| Die Size | 495 mm² | 520 mm² |

| Transistor Density | 25.3M / mm² | 51.5M / mm² |

| Base Clock | Not specified | 1825 MHz |

| Boost Clock | Not specified | 2250 MHz |

| Game Clock | Not specified | 2015 MHz |

| Memory Size | 8 GB | 16 GB |

| Memory Type | HBM2 | GDDR6 |

| Memory Bus Width | 2048 bit | 256 bit |

| Memory Bandwidth | 402.4 GB/s | 512.0 GB/s |

| Shading Units | 3072 | 5120 |

| TMUs | 192 | 320 |

| ROPs | 64 | 128 |

| Ray Tracing Cores | None | 80 |

| Pixel Rate | 76.80 GPixel/s | 288.0 GPixel/s |

| Texture Rate | 230.4 GTexel/s | 720.0 GTexel/s |

| FP32 Performance | 7.373 TFLOPS | 23.04 TFLOPS |

| FP16 Performance | 14.75 TFLOPS (2:1) | 46.08 TFLOPS (2:1) |

| TDP | Not specified | 300 W |

| Slot Width | IGP | Triple-slot |

| Power Connectors | None | 2x 8-pin |

| Suggested PSU | Not specified | 700 W |

| Bus Interface | PCIe 3.0 x16 | PCIe 4.0 x16 |

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

| Vulkan Support | 1.3 | 1.4 |

| Release Date | 2019-03-18 | 2020-10-27 |

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

| Launch MSRP | Not specified | 999 USD |