AMD Radeon HD 7950 vs AMD Radeon RX 590 GME Comparison

# AMD Radeon HD 7950 vs AMD Radeon RX 590 GME

The AMD Radeon HD 7950 and AMD Radeon RX 590 GME represent two distinct eras of AMD graphics architecture, separated by nearly a decade of GPU evolution. The HD 7950, built on the 28 nm Tahiti chip with GCN 1.0, launched in early 2012 as a high-end Southern Islands product, while the RX 590 GME, based on the 14 nm Polaris 20 die with GCN 4.0, arrived in 2020 as a refined mainstream Polaris refresh. The benchmark data places both cards within a similar performance percentile — the HD 7950 sits at the 78th percentile among all GPUs, while the RX 590 GME lands at the 77th — yet their underlying capabilities and feature sets diverge substantially.

Where Each One Wins

The HD 7950's single benchmark result comes from Geekbench Metal, where it scores 33,951 points. This positions it within a tight cluster of competing GPUs: it trails the AMD Radeon RX 480 by just 0.1%, sits 0.3% ahead of the AMD Radeon RX 7700S, and comes within 0.5% of the AMD Radeon RX 560 XT. These razor-thin margins, all under 1%, indicate that in Metal-based workloads — typically found in macOS environments or cross-platform compute tasks — the HD 7950 remains competitive with much newer hardware despite its age. Its 78th percentile ranking confirms it outperforms the majority of GPUs in the database, a remarkable feat for a card from 2012.

The RX 590 GME, by contrast, shows its strengths across a broader range of modern benchmark suites. Its Geekbench OpenCL score of 36,294 represents a 6.9% advantage over the HD 7950's Metal result, though these are different APIs and not directly comparable. More telling is the RX 590 GME's Geekbench Vulkan score of 60,508, which demonstrates substantial compute throughput in a modern graphics API. In 3DMark Steel Nomad DX12, the RX 590 GME posts 1,001 points, a result that, while not directly comparable to the HD 7950's Metal score, establishes a baseline for DirectX 12 gaming performance. The RX 590 GME's average benchmark score of 32,601 places it just 0.2% ahead of the AMD FirePro S9300 X2, 0.4% ahead of the AMD Radeon RX 7900 GRE, and 0.7% ahead of the AMD FirePro S10000, while trailing the NVIDIA T600 Mobile by 0.8%.

The use-case split is clear: the HD 7950 excels in Metal-based compute environments where its GCN 1.0 architecture still delivers competitive results, while the RX 590 GME is the more versatile card for modern gaming and compute APIs, offering Vulkan support at version 1.3 compared to the HD 7950's 1.2.170, and DirectX 12.0 support versus the HD 7950's more limited DirectX 11.1-level feature set.

Architecture Differences

The architectural gap between these two cards is substantial. The HD 7950 uses the Tahiti chip manufactured on TSMC's 28 nm process, containing 4,313 million transistors on a 352 mm² die, yielding a transistor density of 12.3 million per square millimeter. The RX 590 GME employs the Polaris 20 chip built on GlobalFoundries' 14 nm process, packing 5,700 million transistors into a smaller 232 mm² die, achieving a significantly higher transistor density of 24.6 million per square millimeter. This density advantage reflects the process node improvement between generations.

Compute resources differ markedly. The HD 7950 features 1,792 shading units, 112 texture mapping units, and 32 ROPs, delivering 2.867 TFLOPS of FP32 performance. The RX 590 GME substantially increases these counts to 2,304 shading units and 144 TMUs while keeping 32 ROPs, resulting in 6.543 TFLOPS of FP32 throughput — more than double the HD 7950's raw compute. The RX 590 GME also offers FP16 compute at 6.543 TFLOPS with a 1:1 ratio, a capability absent from the HD 7950's specifications.

Memory configurations also diverge significantly. The HD 7950 uses 3 GB of GDDR5 on a 384-bit bus, providing 240.0 GB/s of bandwidth at an effective 5 Gbps. The RX 590 GME ships with 8 GB of GDDR5 on a 256-bit bus, achieving 256.0 GB/s at 8 Gbps effective. Despite the narrower bus, the RX 590 GME's higher memory clock delivers superior bandwidth, and its larger capacity better suits modern games and larger textures. The RX 590 GME also operates at higher clocks: a 1,257 MHz base and 1,420 MHz boost, whereas the HD 7950's base and boost clocks are not specified in the data.

Other differences include display outputs — the HD 7950 offers 1x DVI, 1x HDMI 1.4a, and 2x mini-DisplayPort 1.2, while the RX 590 GME provides 1x HDMI 2.0b and 3x DisplayPort 1.4a, supporting higher resolutions and refresh rates. Power requirements favor the newer card: the RX 590 GME draws 175 W TDP with a single 8-pin connector and a 450 W suggested PSU, while the HD 7950 consumes 200 W TDP, needs dual 6-pin connectors, and recommends a 550 W PSU. Physical dimensions also differ, with the HD 7950 measuring 278 mm in length compared to the RX 590 GME's 241 mm.

Head-to-Head Benchmarks

Direct head-to-head benchmark comparisons between the HD 7950 and RX 590 GME are not available in the dataset, as no common benchmark was run on both cards. However, the available results from separate test suites allow for meaningful analysis of each card's standing within its peer group.

The HD 7950's Geekbench Metal score of 33,951 places it in an extremely tight competitive bracket. Against the AMD Radeon RX 480, which scores 33,997, the HD 7950 trails by just 0.1% — a negligible margin that effectively puts these two cards on par in Metal workloads. The HD 7950 also edges out the AMD Radeon RX 7700S by 0.3% (33,951 versus 33,849) and surpasses the AMD Radeon RX 560 XT by 0.5% (33,951 versus 34,133 in favor of the RX 560 XT, meaning the HD 7950 actually trails by 0.5%). The NVIDIA RTX A2000 12 GB leads this group with 34,154 points, putting the HD 7950 0.6% behind.

The RX 590 GME's results tell a different story across its three benchmarks. Its 3DMark Steel Nomad DX12 score of 1,001 provides a modern DirectX 12 gaming metric that the HD 7950 cannot match given its older DirectX 11.1 feature level. The Geekbench OpenCL score of 36,294 demonstrates strong general-purpose compute performance. Most impressive is the Geekbench Vulkan score of 60,508, which is substantially higher than either card's other results, suggesting the RX 590 GME's GCN 4.0 architecture is particularly well-optimized for Vulkan workloads — an API that the HD 7950 supports only at version 1.2.170 compared to the RX 590 GME's 1.3.

In its own competitive set, the RX 590 GME's average score of 32,601 places it 0.2% ahead of the AMD FirePro S9300 X2 (32,540), 0.4% ahead of the AMD Radeon RX 7900 GRE (32,456), and 0.7% ahead of the AMD FirePro S10000 (32,388). The NVIDIA T600 Mobile (32,849) leads this group by 0.8%. These narrow margins again illustrate how closely matched GPUs cluster in this performance tier.

FAQ

Q: Which card has higher raw FP32 compute performance?

A: The RX 590 GME delivers 6.543 TFLOPS of FP32 performance, more than double the HD 7950's 2.867 TFLOPS.

Q: How do the memory capacities and bandwidths compare?

A: The HD 7950 has 3 GB of GDDR5 on a 384-bit bus with 240.0 GB/s bandwidth, while the RX 590 GME offers 8 GB of GDDR5 on a 256-bit bus with 256.0 GB/s bandwidth.

Q: What are the power consumption differences?

A: The HD 7950 has a 200 W TDP with dual 6-pin connectors and a 550 W suggested PSU, while the RX 590 GME consumes 175 W TDP with a single 8-pin connector and a 450 W suggested PSU.

Q: Which card supports newer graphics APIs?

A: The RX 590 GME supports DirectX 12 (12_0), OpenGL 4.6, and Vulkan 1.3, while the HD 7950 supports DirectX 12 (11_1), OpenGL 4.6, and Vulkan 1.2.170.

Q: How does the HD 7950 compare to the RX 480 in Metal benchmarks?

A: The HD 7950 scores 33,951 in Geekbench Metal, trailing the RX 480's 33,997 by just 0.1%, making them effectively equivalent in this workload.

Q: What is the RX 590 GME's best benchmark result?

A: Its Geekbench Vulkan score of 60,508 is the highest of its three benchmark results, followed by Geekbench OpenCL at 36,294 and 3DMark Steel Nomad DX12 at 1,001.

The Verdict

The data presents a clear generational divide. The RX 590 GME is the superior card for modern workloads: it offers more than double the FP32 compute (6.543 TFLOPS versus 2.867 TFLOPS), higher memory bandwidth (256.0 GB/s versus 240.0 GB/s), and eight times the memory capacity (8 GB versus 3 GB). Its newer architecture supports Vulkan 1.3 and DirectX 12.0, while the HD 7950 is limited to Vulkan 1.2.170 and DirectX 12 (11_1). The RX 590 GME also operates more efficiently, drawing 175 W versus 200 W, and requires a smaller power supply at 450 W versus 550 W.

However, the HD 7950's Geekbench Metal score of 33,951 shows it remains competitive in Apple-centric compute environments, matching the RX 480 within 0.1% and outperforming the RX 7700S by 0.3%. Its 78th percentile ranking versus the RX 590 GME's 77th percentile indicates that in specific API contexts, the older card can still hold its own. Yet this narrow percentile advantage comes from a single benchmark, whereas the RX 590 GME demonstrates capability across three different test suites.

For gamers and users running modern Windows or Linux applications, the RX 590 GME is the rational choice: its 8 GB frame buffer, higher fill rates (45.44 GPixel/s versus 25.60 GPixel/s), and massively higher texture rate (204.5 GTexel/s versus 89.60 GTexel/s) make it far better suited to current titles. For users constrained to Metal-based ecosystems, the HD 7950's competitive Metal score and its 2x mini-DisplayPort 1.2 outputs might suffice, but its 3 GB memory and aging feature set limit its future relevance. The data ultimately favors the RX 590 GME for nearly every practical use case, with the HD 7950's lone Metal benchmark serving as its only statistical claim to relevance in 2024's landscape.