AMD Radeon HD 7970 vs AMD Radeon Pro 580X Comparison

AMD Radeon Pro 580X and AMD Radeon HD 7970 are two very different GPUs from the same manufacturer, separated by seven years of architecture evolution. The Pro 580X is a modern, power-efficient mobile workstation part, while the HD 7970 is a legendary desktop flagship from the GCN 1.0 era. The data shows a clear overall winner in raw compute, but each card has specific strengths that suit different use cases.

Where Each One Wins

The AMD Radeon Pro 580X wins the only direct head-to-head benchmark available. In Geekbench OpenCL, it scores 36426 against the HD 7970’s 34541, a 5.5% advantage. This makes the Pro 580X the better choice for compute-heavy workloads like OpenCL acceleration, where its newer architecture and higher clock speeds translate into measurable gains.

The HD 7970, however, wins on memory bandwidth. Its 384-bit bus provides 264.0 GB/s of bandwidth, which is 45.1 GB/s higher than the Pro 580X’s 218.9 GB/s. This gives the older card an edge in memory-bandwidth-bound scenarios, such as certain types of texture-heavy rendering or large-data compute tasks where the wider bus can compensate for slower processing. The HD 7970 also supports more display outputs, offering 1x DVI, 1x HDMI 1.4a, and 2x mini-DisplayPort 1.2, whereas the Pro 580X is limited to 2x HDMI 2.0b.

The Pro 580X wins on efficiency and form factor. It is an integrated graphics processor (IGP) with a 185 W TDP, while the HD 7970 is a dual-slot card drawing 250 W and requiring a 600 W suggested PSU. For users building a compact Mac Pro system or prioritizing lower power draw, the Pro 580X is the obvious choice.

Architecture Differences

The two cards represent opposite ends of AMD’s Graphics Core Next (GCN) evolution. The Pro 580X uses GCN 4.0, built on a 14 nm process at GlobalFoundries, while the HD 7970 uses the original GCN 1.0 on a 28 nm process at TSMC. This process shrink allows the Pro 580X to pack 5,700 million transistors into a 232 mm² die, achieving a transistor density of 24.6M per mm². In contrast, the HD 7970 has 4,313 million transistors spread across a much larger 352 mm² die, with a density of only 12.3M per mm².

The Pro 580X features 2304 shading units, 144 texture mapping units, and 32 ROPs. The HD 7970 has fewer shading units (2048) and TMUs (128), but matches the ROP count at 32. Clock speeds differ significantly: the Pro 580X runs at 1100 MHz base and 1200 MHz boost, while the HD 7970’s core clocks are not listed in the data. The Pro 580X’s memory runs at 1710 MHz (6.8 Gbps effective), compared to the HD 7970’s 1375 MHz (5.5 Gbps effective).

Architecturally, the Pro 580X supports newer APIs. It has DirectX 12 (12_0) and Vulkan 1.3, while the HD 7970 only reaches DirectX 12 (11_1) and Vulkan 1.2.170. Both support OpenGL 4.6. The Pro 580X also explicitly supports FP16 compute at a 1:1 ratio with FP32, offering 5.530 TFLOPS for both. The HD 7970’s FP16 capability is not listed, indicating it likely lacks dedicated FP16 throughput. The HD 7970’s bus interface is PCIe 3.0 x16, while the Pro 580X uses Apple MPX, reflecting its intended Mac integration.

FAQ

Q: Which card is faster in raw compute performance?

A: The AMD Radeon Pro 580X delivers 5.530 TFLOPS of FP32 performance, significantly outpacing the HD 7970’s 3.789 TFLOPS. This 46% difference in theoretical throughput is confirmed by the Geekbench OpenCL result, where the Pro 580X scores 36426 versus 34541.

Q: Does the HD 7970 have any performance advantage?

A: Yes, in memory bandwidth. The HD 7970’s 384-bit memory bus provides 264.0 GB/s, which is 20.6% higher than the Pro 580X’s 218.9 GB/s. This can benefit workloads that are heavily dependent on memory throughput rather than raw compute.

Q: What are the power requirements for each card?

A: The Pro 580X has a 185 W TDP and is an IGP, meaning it integrates into the system without a separate power connector. The HD 7970 is a dual-slot card with a 250 W TDP, requiring both a 6-pin and an 8-pin power connector, plus a 600 W suggested PSU.

Q: Can the HD 7970 handle modern APIs?

A: The HD 7970 supports DirectX 12 (11_1) and Vulkan 1.2.170, which is functional but behind the Pro 580X’s DirectX 12 (12_0) and Vulkan 1.3. Both cards support OpenGL 4.6.

Q: How do their benchmark scores compare to other GPUs?

A: The Pro 580X sits at the 82nd percentile of all GPUs with an average score of 38706, placing it near the NVIDIA GeForce MX570 A (38691) and the AMD Radeon Pro 575X (39116). The HD 7970 is at the 79th percentile with an average score of 34541, falling between the NVIDIA T1000 8 GB (34561) and the NVIDIA TITAN V (34355).

Q: Which card is more suitable for a compact or integrated system?

A: The Pro 580X is the clear choice for space-constrained builds. It is an IGP with a lower 185 W TDP, whereas the HD 7970 is a 275 mm long, dual-slot card that requires substantial case space and power delivery.

Specification Differences

| Specification | AMD Radeon Pro 580X | AMD Radeon HD 7970 |

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

| Architecture | GCN 4.0 | GCN 1.0 |

| Process Node | 14 nm | 28 nm |

| Foundry | GlobalFoundries | TSMC |

| Transistors | 5,700 million | 4,313 million |

| Die Size | 232 mm² | 352 mm² |

| Transistor Density | 24.6M / mm² | 12.3M / mm² |

| Base Clock | 1100 MHz | Not listed |

| Boost Clock | 1200 MHz | Not listed |

| Memory Clock | 1710 MHz (6.8 Gbps) | 1375 MHz (5.5 Gbps) |

| Memory Size | 8 GB | 3 GB |

| Memory Bus | 256 bit | 384 bit |

| Memory Bandwidth | 218.9 GB/s | 264.0 GB/s |

| Shading Units | 2304 | 2048 |

| TMUs | 144 | 128 |

| ROPs | 32 | 32 |

| Pixel Rate | 38.40 GPixel/s | 29.60 GPixel/s |

| Texture Rate | 172.8 GTexel/s | 118.4 GTexel/s |

| FP32 | 5.530 TFLOPS | 3.789 TFLOPS |

| FP16 | 5.530 TFLOPS (1:1) | Not listed |

| TDP | 185 W | 250 W |

| Slot Width | IGP | Dual-slot |

| Power Connectors | None listed | 1x 6-pin + 1x 8-pin |

| Suggested PSU | Not listed | 600 W |

| Bus Interface | Apple MPX | PCIe 3.0 x16 |

| Display Outputs | 2x HDMI 2.0b | 1x DVI, 1x HDMI 1.4a, 2x mini-DisplayPort 1.2 |

| DirectX | 12 (12_0) | 12 (11_1) |

| Vulkan | 1.3 | 1.2.170 |

| Dimensions | Not listed | 275 mm x 111 mm x 38 mm |

| Release Date | 2019-03-17 | 2012-01-08 |

| Launch MSRP | Not listed | 549 USD |

Head-to-Head Benchmarks

The only direct comparison available is Geekbench OpenCL, where the Pro 580X wins decisively. The Pro 580X scores 36426 against the HD 7970’s 34541, a 5.5% margin. This result aligns with the theoretical compute gap: the Pro 580X offers 5.530 TFLOPS versus 3.789 TFLOPS, a 46% advantage. The benchmark gap is smaller than the raw compute difference suggests, likely because the HD 7970’s superior memory bandwidth (264.0 GB/s vs 218.9 GB/s) helps it close some ground in memory-sensitive OpenCL workloads.

The Pro 580X also wins on pixel and texture throughput. It achieves 38.40 GPixel/s and 172.8 GTexel/s, compared to the HD 7970’s 29.60 GPixel/s and 118.4 GTexel/s. These are 30% and 46% improvements, respectively, indicating the Pro 580X handles rasterization and texture-heavy scenes much faster.

In terms of broader benchmark standing, the Pro 580X’s average score of 38706 places it just behind the AMD Radeon Pro 575X (39116, -1% delta) and ahead of the NVIDIA GeForce MX570 A (38691, 0% delta). The HD 7970’s average of 34541 sits between the NVIDIA RTX A1000 (34207, 1% delta) and the NVIDIA A2 (34690, -0.4% delta). This shows the Pro 580X competes with modern entry-level professional GPUs, while the HD 7970 is now in the range of older or low-power data center accelerators.

The Verdict

The AMD Radeon Pro 580X is the superior GPU for nearly all modern workloads. It wins the only head-to-head benchmark, offers over 45% more FP32 compute, doubles the memory capacity (8 GB vs 3 GB), supports newer API versions, and does all this at a lower 185 W TDP. Its 82nd percentile standing versus the HD 7970’s 79th percentile confirms its overall performance advantage. Users working in OpenCL, video editing, or any compute-heavy task in a Mac Pro should choose the Pro 580X without hesitation.

The AMD Radeon HD 7970 retains one specific niche: bandwidth-critical workloads. Its 384-bit bus and 264.0 GB/s memory bandwidth exceed the Pro 580X by 20.6%. If a user has an application that is purely memory-bound and cannot leverage the Pro 580X’s superior compute throughput, the HD 7970 could still be relevant. However, this is a narrow use case, and the HD 7970’s higher power draw, larger physical footprint, older API support, and lower benchmark scores make it a poor choice for general-purpose use in 2024. Its legacy as a 2012 flagship is clear, but the data shows it has been surpassed by the newer, more efficient Pro 580X.