AMD Radeon HD 8970M vs AMD Radeon RX 6650 XT Comparison

The AMD Radeon HD 8970M and the AMD Radeon RX 6650 XT represent two very different eras of graphics technology, separated by nearly a decade of architectural evolution. The data shows a fascinating split: in the single shared benchmark, the older mobile GPU dominates, yet the newer desktop card offers a feature set and raw compute capability that the older part cannot match. This analysis breaks down exactly what the numbers say, where each card excels, and which type of user should pay attention to each.

Head-to-Head Benchmarks

The only direct benchmark comparison available is the Geekbench OpenCL test, and the results are striking. The AMD Radeon HD 8970M scores 21,237 points, while the AMD Radeon RX 6650 XT scores 10,111 points. This gives the HD 8970M a decisive 110% advantage in this specific workload. It is a massive win for the older card, and it highlights how different the two architectures are for OpenCL compute tasks.

This result is particularly noteworthy when you consider the context of each card's nearest rivals. The HD 8970M sits at the 66th percentile of all GPUs, with an average benchmark score of 21,237. Its nearest competitors in the database are the AMD Radeon RX Vega M GL (21,153 points, 0.4% behind) and the NVIDIA RTX A4000 Mobile (21,379 points, 0.7% ahead). The HD 8970M is essentially trading blows with these much more modern mobile workstation parts, which suggests that its OpenCL performance is still highly competitive in that specific metric.

In contrast, the RX 6650 XT's average benchmark score across all its tests is 19,765, placing it at the 65th percentile. While its OpenCL score is significantly lower, its overall average is dragged up by other tests. For example, its Geekbench Metal score is 97,969, and its Vulkan score is 81,306. These are not directly comparable to the HD 8970M's OpenCL result, but they paint a picture of a GPU that is built for modern graphics APIs rather than legacy compute workloads. The RX 6650 XT's nearest rivals based on average score are the NVIDIA Tesla K40m (19,885 points, 0.6% ahead) and the AMD FirePro W7000 (19,905 points, 0.7% ahead), placing it in a different performance class overall.

The single head-to-head result tells a clear story: the HD 8970M wins the one benchmark they share, but it would be a mistake to declare it the overall winner based on this alone. The RX 6650 XT's other benchmark scores, such as its 17,166 in Passmark G3D and 168.6 GPixel/s pixel rate, indicate that it is a far more capable card for modern gaming and graphics workloads, even if its OpenCL performance is lacking.

The Verdict

The data presents a clear verdict for different use cases. If your primary concern is raw OpenCL compute performance, the AMD Radeon HD 8970M is the surprising winner. Its 21,237-point score is more than double that of the RX 6650 XT in the same test. This makes it a relevant option for specific legacy compute tasks or for users who rely on OpenCL-based applications where the older architecture's drivers and compute units are better optimized.

For virtually everything else, the AMD Radeon RX 6650 XT is the superior choice. Its 10.79 TFLOPS of FP32 performance is nearly five times higher than the HD 8970M's 2.304 TFLOPS. It also supports modern DirectX 12 Ultimate (12_2) and Vulkan 1.4 APIs, compared to the HD 8970M's DirectX 12 (11_1) and Vulkan 1.2.170. The RX 6650 XT also features dedicated ray tracing cores, which the HD 8970M lacks entirely. Its 8 GB of GDDR6 memory with 280.3 GB/s bandwidth is a generational leap over the 4 GB GDDR5 with 153.6 GB/s found on the older card.

The production status of both cards is end-of-life, but the RX 6650 XT was released in 2022, while the HD 8970M dates back to 2013. This is not a fair fight in terms of modern gaming capability. The HD 8970M is a portable MXM module, while the RX 6650 XT is a dual-slot desktop card with a PCIe 4.0 x8 interface. The benchmark data is clear: the RX 6650 XT is the card to pick for anyone building a modern gaming or general-purpose graphics system, while the HD 8970M is a niche compute-focused part with a specific legacy strength.

Architecture Differences

The architectural gap between these two GPUs is enormous. The HD 8970M is built on GCN 1.0 architecture, using the Neptune chip manufactured on a 28 nm process at TSMC. This is a first-generation Graphics Core Next design, which was AMD's foundation for years. It contains 1,280 shading units, 80 texture mapping units, and 32 ROPs. The chip has 2,800 million transistors on a 212 mm² die, resulting in a transistor density of 13.2 million transistors per square millimeter.

The RX 6650 XT, in contrast, uses the RDNA 2.0 architecture with the Navi 23 chip, built on a much more advanced 7 nm process, also at TSMC. RDNA 2.0 is a complete redesign focused on gaming efficiency and features. This chip packs 2,048 shading units, 128 TMUs, and 64 ROPs. It also includes 32 dedicated ray tracing cores, a feature that simply does not exist on the older GCN part. The transistor count jumps to 11,060 million on a 237 mm² die, giving a density of 46.7 million transistors per square millimeter. This is more than triple the density of the HD 8970M, allowing for far more complex logic in a similar physical footprint.

The memory subsystems also reflect the architectural divide. The HD 8970M uses a 256-bit bus with GDDR5 memory, while the RX 6650 XT uses a narrower 128-bit bus but with much faster GDDR6 memory. This is a key architectural trade-off: the newer card relies on higher clock speeds and newer memory technology to achieve greater bandwidth (280.3 GB/s vs 153.6 GB/s) despite having half the physical bus width. The API support is another major differentiator, with the RX 6650 XT supporting DirectX 12 Ultimate and Vulkan 1.4, which are prerequisites for modern game features like mesh shaders and variable rate shading.

Specification Differences

The specification sheets for these two cards read like a tale of two generations. The clock speeds are a primary difference: the HD 8970M operates at a 850 MHz base and 900 MHz boost, while the RX 6650 XT runs at 2055 MHz base, 2410 MHz game clock, and 2635 MHz boost. This nearly 3x difference in clock speed is a direct result of the process node improvement.

Memory capacity and speed differ significantly. The HD 8970M offers 4 GB of GDDR5 at 1200 MHz (4.8 Gbps effective), while the RX 6650 XT has 8 GB of GDDR6 at 2190 MHz (17.5 Gbps effective). This results in a bandwidth advantage for the RX 6650 XT: 280.3 GB/s versus 153.6 GB/s. The power draw also tells a story: the HD 8970M is rated at a 100 W TDP, while the RX 6650 XT sits at 176 W. This is a modest increase for a massive performance jump.

The physical and interface specifications are entirely different. The HD 8970M is an MXM module designed for laptops, with its display outputs being portable device dependent. The RX 6650 XT is a dual-slot desktop card with a 1x 8-pin power connector and a suggested PSU of 450 W. It features display outputs of 1x HDMI 2.1 and 3x DisplayPort 1.4a. The bus interface also differs: PCIe 3.0 x16 for the old card versus PCIe 4.0 x8 for the new one. The RX 6650 XT also has a launch MSRP of 399 USD, which can be noted as a reference point, though the HD 8970M had no official launch price listed.

FAQ

Q: Which GPU has higher raw compute power (FP32)?

A: The AMD Radeon RX 6650 XT is significantly more powerful, offering 10.79 TFLOPS of FP32 performance compared to the HD 8970M's 2.304 TFLOPS.

Q: Does the HD 8970M support ray tracing?

A: No. The HD 8970M has no ray tracing cores. The RX 6650 XT includes 32 ray tracing cores as part of its RDNA 2.0 architecture.

Q: Which card has more memory and bandwidth?

A: The RX 6650 XT has 8 GB of GDDR6 memory with 280.3 GB/s bandwidth. The HD 8970M has 4 GB of GDDR5 with 153.6 GB/s bandwidth.

Q: Why does the HD 8970M score higher in the Geekbench OpenCL test?

A: The HD 8970M scores 21,237 in Geekbench OpenCL, which is 110% higher than the RX 6650 XT's 10,111. This indicates that the older GCN architecture is better optimized for this specific compute workload.

Q: What is the difference in their API support?

A: The RX 6650 XT supports DirectX 12 Ultimate (12_2) and Vulkan 1.4. The HD 8970M is limited to DirectX 12 (11_1) and Vulkan 1.2.170.

Q: Are both cards still in production?

A: No. Both the AMD Radeon HD 8970M and the AMD Radeon RX 6650 XT have a production status of end-of-life.

Where Each One Wins

The AMD Radeon HD 8970M wins in the niche of legacy OpenCL compute. Its 21,237-point score in Geekbench OpenCL is a clear victory, and its 110% delta over the RX 6650 XT in this test is the single biggest performance gap in the data. If you are running an application that is heavily dependent on OpenCL and cannot use modern APIs, this older card's architecture might be better suited, as evidenced by its 66th percentile ranking and its close competition with the NVIDIA RTX A4000 Mobile and AMD Radeon RX Vega M GL in that specific workload.

The AMD Radeon RX 6650 XT wins in nearly every other measurable category. It has a higher average benchmark score of 19,765, a 99.3% percentile ranking, and superior scores in modern graphics tests like Passmark G3D (17,166) and Geekbench Vulkan (81,306). Its pixel rate of 168.6 GPixel/s and texture rate of 337.3 GTexel/s are 6x and 4.7x higher, respectively, than the HD 8970M's 28.80 GPixel/s and 72.00 GTexel/s. For gamers and users of modern graphics software, the choice is clear. The RX 6650 XT's support for ray tracing, DirectX 12 Ultimate, and a much higher memory bandwidth make it the only viable option for current titles. Its dual-slot desktop form factor and PCIe 4.0 interface also make it a practical choice for a modern PC build, whereas the HD 8970M is a portable module with limited connectivity. In short, the HD 8970M is a compute specialist that wins one benchmark, while the RX 6650 XT is the all-around graphics powerhouse that wins the war.