AMD Radeon HD 7970 vs NVIDIA RTX A5000 Comparison

AMD Radeon HD 7970 and NVIDIA RTX A5000 represent two vastly different eras of GPU design, separated by nearly a decade of architectural evolution. The data shows a single head-to-head benchmark result, with the RTX A5000 delivering a decisive victory, yet the HD 7970 remains a historically significant part. The HD 7970, built on GCN 1.0, was a pioneer for its time, while the RTX A5000 is a modern workstation powerhouse. This analysis breaks down where each card wins, the fundamental architectural differences, and what the benchmark numbers actually mean for prospective users.

Where Each One Wins

The usage split between these two cards is stark and defined by their respective benchmark portfolios. The AMD Radeon HD 7970 has exactly one recorded benchmark result: Geekbench OpenCL, where it scores 34,541. This places it in the 79th percentile of all GPUs, a respectable showing for a card from its era. Its nearest rivals in the database include the NVIDIA T1000 8 GB (34,561, a 0.1% difference), the NVIDIA A2 (34,690, a 0.4% difference), and the NVIDIA TITAN V (34,355, a 0.5% difference). This clustering suggests the HD 7970’s raw compute performance in this specific test sits in a narrow band with several other older or entry-level professional cards.

The NVIDIA RTX A5000, by contrast, has a much broader benchmark footprint, with results across DirectX 9, 10, 11, 12, Vulkan, OpenCL, and compute workloads. Its Geekbench OpenCL score of 157,905 is not only an absolute win over the HD 7970 but also places the A5000 in the 78th percentile overall. In the head-to-head comparison, the A5000 wins 1 out of 1 benchmarks. The RTX A5000’s wins are not just about OpenCL; it also posts scores like 22,541 in Passmark G3D, 12,455 in Passmark GPU Compute, and 137,828 in Geekbench Vulkan. These results indicate the A5000 is designed for sustained, professional workloads across multiple APIs, whereas the HD 7970’s historical strength is limited to a single legacy compute test.

The practical interpretation is that the HD 7970 wins in the context of retro computing or legacy application compatibility, where its 3 GB of memory and GCN architecture are sufficient. The RTX A5000 wins in every modern professional scenario—3D rendering, AI inference, and high-resolution content creation—where its massive memory pool and modern feature set are mandatory.

Architecture Differences

The architectural gap between these two GPUs is monumental, reflecting a decade of semiconductor progress. The HD 7970 uses the Tahiti chip on TSMC’s 28 nm process node, packing 4,313 million transistors into a 352 mm² die. This yields a transistor density of 12.3 million transistors per square millimeter. The RTX A5000 uses the GA102 chip on Samsung’s 8 nm node, with 28,300 million transistors on a much larger 628 mm² die, achieving a density of 45.1 million transistors per square millimeter. The A5000 has over six times the transistor count and nearly four times the density, which directly translates to its massive performance lead.

Core configuration differences are equally pronounced. The HD 7970 features 2,048 shading units, 128 TMUs, and 32 ROPs. The RTX A5000 has 8,192 shading units, 256 TMUs, and 96 ROPs—quadruple the shaders, double the TMUs, and triple the ROPs. The A5000 also introduces dedicated hardware absent in the HD 7970: 64 RT cores for ray tracing and 256 tensor cores for AI acceleration. These are not incremental improvements; they represent new processing paradigms that the HD 7970 cannot emulate.

Memory architecture also tells a story of divergence. The HD 7970 uses 3 GB of GDDR5 on a 384-bit bus, delivering 264.0 GB/s bandwidth. The RTX A5000 uses 24 GB of GDDR6 on the same 384-bit bus width, but with 768.0 GB/s bandwidth—8 times the capacity and nearly 3 times the bandwidth. The A5000’s memory clock is 2000 MHz (16 Gbps effective) versus the HD 7970’s 1375 MHz (5.5 Gbps effective). The A5000’s PCIe 4.0 x16 interface doubles the bandwidth of the HD 7970’s PCIe 3.0 x16, further distancing the two in data throughput capabilities.

Feature support is another differentiator. The HD 7970 supports DirectX 12 (11_1), OpenGL 4.6, and Vulkan 1.2.170. The RTX A5000 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The A5000’s support for DirectX 12 Ultimate includes hardware ray tracing and variable rate shading, features that are entirely absent from the HD 7970’s feature set.

Head-to-Head Benchmarks

The only direct comparison available in the database is Geekbench OpenCL, and the result is a landslide. The AMD Radeon HD 7970 scores 34,541, while the NVIDIA RTX A5000 scores 157,905. The delta is -78.1% for the HD 7970, meaning the A5000 is roughly 4.5 times faster in this compute workload. To put this in perspective, the HD 7970’s score is only about 22% of the A5000’s output. This is not a marginal improvement; it is a generational leap that reflects the A5000’s superior shader count, higher clock speeds (1170 MHz base, 1695 MHz boost versus the HD 7970’s unspecified base/boost), and much larger memory bandwidth.

Looking at the A5000’s other benchmark results provides additional context for its dominance. In Passmark G3D, it scores 22,541, while Passmark GPU Compute yields 12,455. Its DirectX 9 score is 251, DirectX 10 is 153, DirectX 11 is 187, and DirectX 12 is 87. The low DirectX scores in Passmark are typical of workstation cards, which prioritize compute and professional rendering over gaming-specific rasterization. The A5000’s Geekbench Vulkan score of 137,828 shows strong cross-API compute performance. The HD 7970, with no other benchmark results, cannot compete in these metrics.

The HD 7970’s nearest rivals (NVIDIA T1000, A2, TITAN V, RTX A1000) all score within 1% of its 34,541, indicating that the HD 7970’s performance level is consistent with a specific tier of legacy or low-end professional GPUs. In contrast, the A5000’s nearest rivals (GTX 1060 5 GB, RX 7700S, HD 7950, RX 480) score around 33,600–34,000, which is far below the A5000’s actual scores. This suggests that the A5000’s average benchmark score of 33,622 is pulled down by its Passmark DirectX results, which are low, but its peak compute performance (157,905) is what defines its capability for professional workloads.

Specification Differences

The specification sheets reveal fundamental differences that explain the benchmark results. The process node differs: the HD 7970 is on 28 nm (TSMC), while the RTX A5000 is on 8 nm (Samsung). Transistor count is 4,313 million versus 28,300 million, and die size is 352 mm² versus 628 mm². The RTX A5000 has a base clock of 1170 MHz and a boost clock of 1695 MHz; the HD 7970 does not list base or boost clocks in the data, only memory clock. Memory specifications differ drastically: 3 GB GDDR5 versus 24 GB GDDR6, with bandwidth of 264.0 GB/s versus 768.0 GB/s.

Core counts are a major differentiator: 2,048 shading units, 128 TMUs, and 32 ROPs on the HD 7970, versus 8,192 shading units, 256 TMUs, and 96 ROPs on the RTX A5000. The A5000 has 64 RT cores and 256 tensor cores; the HD 7970 has none. Pixel rate is 29.60 GPixel/s on the HD 7970 versus 162.7 GPixel/s on the A5000. Texture rate is 118.4 GTexel/s versus 433.9 GTexel/s. FP32 performance is 3.789 TFLOPS versus 27.77 TFLOPS. The A5000 also has FP16 performance of 27.77 TFLOPS (1:1), while the HD 7970 has no listed FP16 capability.

Power and physical specifications also differ. The HD 7970 has a TDP of 250 W with a suggested PSU of 600 W, while the RTX A5000 has a TDP of 230 W with a suggested PSU of 550 W—the A5000 delivers far more performance per watt. The HD 7970 uses 1x 6-pin + 1x 8-pin power connectors; the A5000 uses a single 8-pin. The HD 7970 offers display outputs of 1x DVI, 1x HDMI 1.4a, and 2x mini-DisplayPort 1.2, while the A5000 offers 4x DisplayPort 1.4a. The HD 7970 is 275 mm long, 111 mm high, and 38 mm wide; the A5000 is 267 mm long and 112 mm high, with no width listed. The HD 7970 has a launch MSRP of 549 USD; the A5000 has no listed launch MSRP.

FAQ

Q: Which GPU is faster in Geekbench OpenCL?

A: The NVIDIA RTX A5000 scores 157,905 versus the AMD Radeon HD 7970’s 34,541, a delta of -78.1% for the HD 7970, making the A5000 roughly 4.5 times faster.

Q: Does the AMD Radeon HD 7970 support ray tracing?

A: No. The HD 7970 has no RT cores listed in its specifications, whereas the NVIDIA RTX A5000 includes 64 RT cores for hardware-accelerated ray tracing.

Q: What is the memory capacity difference between the two cards?

A: The HD 7970 has 3 GB of GDDR5 memory, while the RTX A5000 has 24 GB of GDDR6 memory. The A5000 also has higher bandwidth at 768.0 GB/s versus 264.0 GB/s.

Q: How do their transistor densities compare?

A: The HD 7970 has a transistor density of 12.3 million transistors per square millimeter on a 28 nm process, while the RTX A5000 achieves 45.1 million transistors per square millimeter on an 8 nm process.

Q: Which card has a higher pixel rate?

A: The NVIDIA RTX A5000 has a pixel rate of 162.7 GPixel/s, while the AMD Radeon HD 7970 has a pixel rate of 29.60 GPixel/s, indicating the A5000 can fill frames significantly faster.

Q: Are both cards end-of-life products?

A: Yes, both the AMD Radeon HD 7970 and the NVIDIA RTX A5000 have a production status of "End-of-life" according to the data, though they were released in different eras (2012 and 2021, respectively).