AMD Radeon HD 7950 vs NVIDIA RTX A6000 Comparison

The Verdict

The NVIDIA RTX A6000 is in a completely different performance class than the AMD Radeon HD 7950. The recorded data shows the RTX A6000 produces an average benchmark score of 44,075, while the Radeon HD 7950 sits at 33,951. That is a 29.8% overall advantage for the A6000, and the gap is far wider in compute-oriented workloads. The A6000 delivers 38.71 TFLOPS of FP32 throughput versus 2.867 TFLOPS for the HD 7950, a 13.5x difference in raw shader math. The A6000 also has 48 GB of GDDR6 memory with 768.0 GB/s of bandwidth, while the HD 7950 offers 3 GB of GDDR5 at 240.0 GB/s.

Who should pick which? The data clearly indicates the RTX A6000 is intended for modern professional workflows: large datasets, ray tracing, AI acceleration, and high-resolution rendering. The HD 7950, with its GCN 1.0 architecture, 3 GB memory, and no ray tracing or tensor cores, is a legacy part that only makes sense for older software or compatibility testing. The HD 7950 does have one notable win: it is smaller and consumes less power, with a 200 W TDP versus 300 W for the A6000, and it requires a 550 W suggested PSU versus 700 W. But in every measurable performance category, the A6000 dominates.

Architecture Differences

The RTX A6000 is built on NVIDIA's Ampere architecture using the GA102 chip, fabricated on Samsung's 8 nm process. It packs 28,300 million transistors into a 628 mm² die, yielding a transistor density of 45.1M per mm². The A6000 features 10,752 shading units, 336 texture mapping units, 112 ROPs, 84 ray tracing cores, and 336 tensor cores. It supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The memory subsystem uses GDDR6 running at 2000 MHz with 16 Gbps effective speed across a 384 bit bus.

The Radeon HD 7950 uses AMD's GCN 1.0 architecture with the Tahiti chip, built on TSMC's 28 nm process. It contains 4,313 million transistors on a 352 mm² die, with a transistor density of 12.3M per mm². The HD 7950 has 1,792 shading units, 112 TMUs, and 32 ROPs. It has no ray tracing cores and no tensor cores. Its API support is more limited: DirectX 12 (11_1), OpenGL 4.6, and Vulkan 1.2.170. The memory runs at 1250 MHz with 5 Gbps effective speed on a 384 bit bus.

The architectural gulf is enormous. The A6000 has 6x the shading units, 3x the TMUs, 3.5x the ROPs, and adds dedicated ray tracing and tensor hardware that the HD 7950 completely lacks. The transistor count difference is 6.6x in favor of the A6000, and the process node difference (8 nm versus 28 nm) explains much of that. The A6000 also supports newer PCIe 4.0 x16, while the HD 7950 is limited to PCIe 3.0 x16.

Head-to-Head Benchmarks

Direct comparison is limited because the two cards share only one benchmark in the database: the HD 7950 has a single recorded Geekbench Metal score of 33,951, while the A6000 has no Metal score. However, the A6000 has multiple other benchmark results that can be contextualized against the HD 7950's average. The A6000 scores 193,937 in Geekbench OpenCL and 164,462 in Geekbench Vulkan. The HD 7950's 33,951 average across all tests is the only data point available for it.

The PassMark suite shows the A6000's profile: 22,577 in G3D, 14,110 in GPU Compute, 913 in G2D, 245 in DirectX 9, 191 in DirectX 11, 155 in DirectX 10, and 87 in DirectX 12. These numbers indicate the A6000 is strongest in modern compute and general 3D workloads, while its older DirectX performance is comparatively lower. The HD 7950's average score of 33,951 places it near the AMD Radeon RX 480 (33,997, a 0.1% delta), the AMD Radeon RX 7700S (33,849, a 0.3% delta), the AMD Radeon RX 560 XT (34,133, a 0.5% delta), and the NVIDIA RTX A2000 12 GB (34,154, a 0.6% delta).

The A6000's nearest rivals tell a similar story. It is 0.9% ahead of the NVIDIA GeForce RTX 4090 Mobile (43,667), 1.6% behind the NVIDIA GeForce RTX 4070 Ti (44,795), 1.8% ahead of the NVIDIA Quadro M6000 (43,301), and 1.9% ahead of the NVIDIA GeForce RTX 5050 Mobile (43,268). The A6000 sits at the 84th percentile of all GPUs, while the HD 7950 sits at the 78th percentile. That percentile gap is modest, but the absolute score difference is substantial because the benchmark pool skews toward modern cards.

Specification Differences

| Specification | NVIDIA RTX A6000 | AMD Radeon HD 7950 |

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

| Architecture | Ampere | GCN 1.0 |

| Process node | 8 nm (Samsung) | 28 nm (TSMC) |

| Transistors | 28,300 million | 4,313 million |

| Die size | 628 mm² | 352 mm² |

| Transistor density | 45.1M / mm² | 12.3M / mm² |

| Memory size | 48 GB | 3 GB |

| Memory type | GDDR6 | GDDR5 |

| Memory bus | 384 bit | 384 bit |

| Memory clock | 2000 MHz (16 Gbps effective) | 1250 MHz (5 Gbps effective) |

| Memory bandwidth | 768.0 GB/s | 240.0 GB/s |

| Shading units | 10,752 | 1,792 |

| TMUs | 336 | 112 |

| ROPs | 112 | 32 |

| RT cores | 84 | None |

| Tensor cores | 336 | None |

| Pixel rate | 201.6 GPixel/s | 25.60 GPixel/s |

| Texture rate | 604.8 GTexel/s | 89.60 GTexel/s |

| FP32 | 38.71 TFLOPS | 2.867 TFLOPS |

| FP16 | 38.71 TFLOPS (1:1) | Not specified |

| TDP | 300 W | 200 W |

| Power connectors | 8-pin EPS | 2x 6-pin |

| Suggested PSU | 700 W | 550 W |

| Bus interface | PCIe 4.0 x16 | PCIe 3.0 x16 |

| Display outputs | 4x DisplayPort 1.4a | 1x DVI, 1x HDMI 1.4a, 2x mini-DisplayPort 1.2 |

| DirectX | 12 Ultimate (12_2) | 12 (11_1) |

| Vulkan | 1.4 | 1.2.170 |

| Length | 267 mm | 278 mm |

| Height | 112 mm | 111 mm |

| Width | Not specified | 38 mm |

| Release date | 2020-10-04 | 2012-01-30 |

| Launch MSRP | 4,649 USD | 449 USD |

The A6000 is longer but slightly shorter in height than the HD 7950. Both are dual-slot cards. The A6000 uses a single 8-pin EPS connector, while the HD 7950 uses two 6-pin connectors.

FAQ

Q: Which card has more memory bandwidth?

A: The NVIDIA RTX A6000 has 768.0 GB/s of bandwidth, which is 3.2x the 240.0 GB/s of the AMD Radeon HD 7950.

Q: Does the AMD Radeon HD 7950 support ray tracing?

A: No. The HD 7950 has no ray tracing cores, while the RTX A6000 has 84 RT cores.

Q: What is the FP32 performance difference?

A: The RTX A6000 delivers 38.71 TFLOPS of FP32 compute, compared to 2.867 TFLOPS for the HD 7950, a 13.5x advantage.

Q: Which card has a higher average benchmark score?

A: The RTX A6000 has an average benchmark score of 44,075, which is 29.8% higher than the HD 7950's 33,951.

Q: Are both cards still in production?

A: No. Both are end-of-life products according to the database.

Q: What is the power consumption difference?

A: The RTX A6000 has a 300 W TDP and suggests a 700 W PSU, while the HD 7950 has a 200 W TDP and suggests a 550 W PSU.

Where Each One Wins

The NVIDIA RTX A6000 wins in every performance category that matters for modern workloads. Its 38.71 TFLOPS FP32 throughput is essential for large compute tasks, and its 336 tensor cores enable AI and deep learning acceleration that the HD 7950 cannot attempt. The 84 ray tracing cores make it suitable for real-time ray-traced rendering, while the 48 GB of GDDR6 memory with 768.0 GB/s bandwidth allows loading massive datasets, high-resolution textures, and complex scenes without swapping. The A6000's 604.8 GTexel/s texture rate and 201.6 GPixel/s pixel rate are 6.7x and 7.9x higher than the HD 7950 respectively, which translates directly to faster fill and texturing in 3D applications. Its PCIe 4.0 x16 interface doubles the bus bandwidth available to the HD 7950's PCIe 3.0 x16. The A6000 also supports newer API versions: DirectX 12 Ultimate (12_2) versus 12 (11_1), and Vulkan 1.4 versus 1.2.170.

The AMD Radeon HD 7950 wins in power efficiency and physical footprint. It consumes 200 W versus 300 W, and its suggested PSU is 550 W versus 700 W. The HD 7950 is longer at 278 mm versus 267 mm, but it is the same height (111 mm versus 112 mm) and has a specified width of 38 mm while the A6000's width is not recorded. For users running legacy software that predates the HD 7950's 2012 release, the GCN 1.0 architecture may have compatibility advantages with older drivers and applications. The HD 7950 also offers a DVI output, which the A6000 lacks entirely; the A6000 only has DisplayPort 1.4a outputs. The HD 7950's launch MSRP was 449 USD, but pricing is not part of this analysis.

The use-case split is clear: the RTX A6000 is for professionals who need maximum compute, memory capacity, and modern feature support. The HD 7950 is for retro systems, legacy software testing, or scenarios where power draw is the primary constraint. The benchmark data does not support any other conclusion.