AMD Radeon HD 8970M vs AMD Radeon RX 6600 Comparison

Head-to-Head Benchmarks

The only directly comparable benchmark between the two cards is Geekbench OpenCL, and the result is decisive. The AMD Radeon RX 6600 scores 28,850, while the AMD Radeon HD 8970M scores 21,237. The RX 6600 wins by 26.4%, a substantial margin that reflects the generational leap between these two products. The HD 8970M trails by that same 26.4% delta, meaning the newer card delivers roughly a quarter more compute throughput in this specific OpenCL workload.

Context from the database's nearest rival data helps frame the HD 8970M's standing. Its 21,237 average score sits just 0.4% above the AMD Radeon RX Vega M GL (21,153) and 1% above the NVIDIA GeForce RTX 5050 (21,035). It is 0.7% behind the NVIDIA RTX A4000 Mobile (21,379) and 1.8% behind the NVIDIA Quadro RTX 5000 (21,629). These are tight margins, indicating the HD 8970M occupies a narrow performance band where small deltas separate it from several modern and semi-modern parts. The RX 6600, by contrast, groups with a different tier: its 19,036 average benchmark score is statistically level with the NVIDIA Quadro K6000 (19,030, 0% delta), the NVIDIA GeForce RTX 4050 Mobile (19,049, -0.1%), the NVIDIA Tesla K20m (19,089, -0.3%), and the NVIDIA RTX 2000 Ada Generation (18,954, 0.4%). The RX 6600's OpenCL win over the HD 8970M is therefore not an outlier; it is consistent with the RX 6600 being positioned in a higher performance class.

The RX 6600 also holds a percentile advantage, ranking in the 63rd percentile of all GPUs in the database, while the HD 8970M ranks in the 66th percentile. This appears counterintuitive given the RX 6600's higher raw score, but the percentile field reflects the distribution of all recorded GPUs, and the HD 8970M's score of 21,237 places it in a surprisingly high percentile despite being older. The RX 6600's average benchmark score of 19,036 across a broader set of tests (including DirectX 9, 10, 11, 12, Vulkan, Metal, and compute workloads) pulls its average down relative to its OpenCL peak, whereas the HD 8970M has only a single recorded OpenCL benchmark. The database shows the RX 6600's Passmark G3D score at 15,096, its Vulkan score at 67,623, and its Metal score at 88,398, none of which have a counterpart on the HD 8970M side.

FAQ

Q: How much faster is the RX 6600 in OpenCL compute compared to the HD 8970M?

A: The RX 6600 scores 28,850 in Geekbench OpenCL versus 21,237 for the HD 8970M, a 26.4% advantage for the RX 6600.

Q: Which card has more memory bandwidth?

A: The RX 6600 has 224.0 GB/s of bandwidth from 8 GB of GDDR6 on a 128-bit bus. The HD 8970M has 153.6 GB/s from 4 GB of GDDR5 on a 256-bit bus. The RX 6600 wins on bandwidth despite a narrower bus.

Q: Does the HD 8970M support ray tracing?

A: No. The HD 8970M has no ray tracing cores listed. The RX 6600 includes 28 ray tracing cores and supports DirectX 12 Ultimate (12_2), whereas the HD 8970M supports DirectX 12 (11_1).

Q: What is the transistor density difference between the two chips?

A: The RX 6600's Navi 23 chip has a transistor density of 46.7 million transistors per square millimeter, while the HD 8970M's Neptune chip has 13.2 million per square millimeter. The RX 6600 packs 11,060 million transistors on a 237 mm² die, versus 2,800 million on a 212 mm² die for the HD 8970M.

Q: Which card has a higher pixel fill rate?

A: The RX 6600 has a pixel rate of 159.4 GPixel/s, far above the HD 8970M's 28.80 GPixel/s. The RX 6600 also leads in texture rate at 279.0 GTexel/s versus 72.00 GTexel/s.

Q: Are both cards still in production?

A: No. Both are end-of-life. The HD 8970M was released in May 2013, and the RX 6600 was released in October 2021.

Architecture Differences

The two cards come from entirely different architectural lineages within AMD. The HD 8970M is built on GCN 1.0, the original Graphics Core Next design, using the Neptune chip. The RX 6600 uses RDNA 2.0 with the Navi 23 chip. This is not a refinement; it is a wholesale redesign of the GPU compute and rendering pipeline. GCN 1.0 was designed for the 2013 era of gaming and general compute, while RDNA 2.0 introduces modern features such as hardware ray tracing, which the HD 8970M lacks entirely. The RX 6600 lists 28 ray tracing cores, a feature absent from the HD 8970M's specification sheet.

The manufacturing process separates the two further. The HD 8970M uses a 28 nm process at TSMC, while the RX 6600 uses a 7 nm process, also at TSMC. This node jump explains the dramatic density difference: the RX 6600 crams 46.7 million transistors per square millimeter versus 13.2 million for the HD 8970M. Total transistor count is 11,060 million for the RX 6600 versus 2,800 million for the HD 8970M, although the RX 6600's die is only slightly larger at 237 mm² compared to 212 mm². The HD 8970M achieves its smaller footprint through an older, less dense process and fewer functional units.

The shading and rasterization resources also differ. The RX 6600 has 1,792 shading units, 112 texture mapping units, and 64 render output units. The HD 8970M has 1,280 shading units, 80 TMUs, and 32 ROPs. The RX 6600 has more of everything, and the ROP doubling from 32 to 64 directly explains its much higher pixel rate of 159.4 GPixel/s versus 28.80 GPixel/s. Texture rate similarly jumps from 72.00 GTexel/s to 279.0 GTexel/s, driven by both more TMUs and higher clock speeds.

The API support tells a similar story. The RX 6600 supports DirectX 12 Ultimate (12_2), Vulkan 1.4, and OpenGL 4.6. The HD 8970M supports DirectX 12 (11_1), Vulkan 1.2.170, and OpenGL 4.6. Both cards support OpenGL 4.6, but the DirectX and Vulkan tiers differ substantially. The RX 6600's DirectX 12 Ultimate designation includes features like ray tracing and variable rate shading that the HD 8970M cannot access. The HD 8970M's Vulkan support at version 1.2.170 is functional but does not include the later extensions and optimizations present in Vulkan 1.4.

Specification Differences

Memory is a major differentiator. The RX 6600 has 8 GB of GDDR6 at 14 Gbps effective, with 224.0 GB/s bandwidth over a 128-bit bus. The HD 8970M has 4 GB of GDDR5 at 4.8 Gbps effective, with 153.6 GB/s bandwidth over a 256-bit bus. The RX 6600 delivers 70.4 GB/s more bandwidth despite using half the bus width, a direct benefit of GDDR6's higher data rate. The HD 8970M's wider bus is not enough to overcome its older memory technology.

Clock speeds are dramatically different. The HD 8970M runs at an 850 MHz base and 900 MHz boost. The RX 6600 runs at a 1,626 MHz base, a 2,491 MHz boost, and a 2,044 MHz game clock. The RX 6600's boost clock is roughly 2.77 times higher than the HD 8970M's boost, and even its base clock nearly doubles the HD 8970M's boost. Memory clocks follow the same pattern: 1,750 MHz for the RX 6600 versus 1,200 MHz for the HD 8970M, with effective rates of 14 Gbps and 4.8 Gbps respectively.

Power and physical design differ sharply. The HD 8970M has a 100 W TDP and uses an MXM Module form factor, with display outputs labeled as portable device dependent. The RX 6600 has a 132 W TDP, uses a dual-slot design, requires a single 8-pin power connector, and has a suggested PSU of 300 W. The RX 6600 measures 190 mm in length, 110 mm in height, and 40 mm in width. The HD 8970M has no dimensions listed. The bus interface also differs: PCIe 3.0 x16 for the HD 8970M versus PCIe 4.0 x8 for the RX 6600. The RX 6600's interface has half the lane count but double the per-lane bandwidth of PCIe 3.0.

Compute throughput is far apart. The RX 6600 delivers 8.928 TFLOPS of FP32 performance, while the HD 8970M delivers 2.304 TFLOPS. The RX 6600 also lists FP16 performance at 17.86 TFLOPS (2:1), while the HD 8970M has no FP16 figure. The RX 6600's shading unit count, clock speed, and ROP count all contribute to these gaps.

The Verdict

The data points to a clear conclusion: the RX 6600 is the superior GPU in every measurable category where both cards have comparable data. In OpenCL, the only shared benchmark, the RX 6600 wins by 26.4%. Its memory bandwidth is 45.8% higher, its pixel rate is 5.5 times higher, its texture rate is 3.9 times higher, and its FP32 throughput is 3.9 times higher. It has double the memory capacity, a more modern process node, ray tracing hardware, and newer API support including DirectX 12 Ultimate and Vulkan 1.4.

The HD 8970M's strengths are narrower. It has a lower TDP at 100 W versus 132 W, which matters for mobile deployment, and its MXM form factor makes it suitable for laptop upgrades rather than desktop builds. Its 256-bit memory bus is wider than the RX 6600's 128-bit bus, but the practical bandwidth advantage goes to the RX 6600. Its percentile ranking of 66th versus the RX 6600's 63rd is a statistical artifact of the different benchmark sets recorded, not evidence of real performance superiority.

The RX 6600 is the choice for anyone prioritizing compute performance, modern API support, ray tracing, or high-resolution texture workloads. The HD 8970M is the choice for legacy mobile systems where the MXM form factor and 100 W power envelope are constraints, or where the older GCN 1.0 architecture is already in place and the user does not need the RX 6600's feature set.

Where Each One Wins

The RX 6600 wins in every computational benchmark category recorded. Its OpenCL score of 28,850 beats the HD 8970M's 21,237 by 26.4%. Its FP32 throughput of 8.928 TFLOPS is 3.9 times the HD 8970M's 2.304 TFLOPS. Its FP16 performance of 17.86 TFLOPS has no HD 8970M equivalent. Its 8 GB of GDDR6 provides double the capacity and 224.0 GB/s bandwidth, enough for modern game textures and compute workloads. The RX 28 ray tracing cores enable hardware-accelerated ray tracing, a feature class the HD 8970M does not have. The RX 6600's DirectX 12 Ultimate support at 12_2 surpasses the HD 8970M's 12_1 support, and Vulkan 1.4 supersedes the HD 8970M's 1.2. The RX 6600's Passmark G3D score of 15,096, Vulkan score of 67,623, Metal score of 88,398, and compute score of 6,554 all stand alone.

The HD 8970M wins in one specific context: power efficiency. Its 100 W TDP undercuts the RX 6600's 132 W by 32 W a 24.2% advantage in favor of the HD 8970M. Its MXM Module form factor and portable device dependent display outputs make it suitable for laptop installations, whereas the RX 6600 is a dual-slot desktop card with 1x HDMI 2.1 and 3x DisplayPort 1.4a outputs. The HD 8970M's PCIe 3.0 x16 interface is also wider than the RX 6600's PCIe 4.0 x8, which could matter in older systems without PCIe 4.0 support. Its 256-bit memory bus width is double the RX 6600's 128-bit bus, a spec sheet advantage that does not translate into a bandwidth win.

For a mobile user with a 100 W power budget, the HD 8970M is the only viable option. For desktop users, the RX 6600 delivers more compute, more memory, more bandwidth, and more modern features at a 32 W higher power draw. The RX 6600 also offers a launch MSRP of 329 USD, which the database records as its only listed price figure. The HD 8970M has no launch MSRP recorded.