AMD Radeon RX 6600M vs AMD Radeon RX 6700S Comparison

Both GPUs are members of AMD’s Radeon RX 6000 series, built on the same RDNA 2.0 architecture and 7 nm process. Despite sharing the Navi 23 chip, an 8 GB GDDR6 memory configuration, and identical transistor counts, the benchmark data reveals a clear split in performance priorities between the two mobile parts.

Head-to-Head Benchmarks

The most decisive single result in the entire dataset belongs to the RX 6600M in the Geekbench Metal test. It scores 92,237 points against the RX 6700S’s 72,864, a commanding 26.6% lead. This is the largest delta between the two cards in any benchmark and suggests a significant advantage in Apple-centric or Metal-accelerated workloads. No other test comes close to this margin.

The RX 6700S, however, wins the overall head-to-head count, taking 7 of the 11 benchmarks. Its most substantial victory is in Passmark DirectX 12, where it scores 58 versus the RX 6600M’s 52, a 10.3% improvement. This is followed by a 7.5% win in Passmark G3D (15,066 vs 13,929) and a 5.7% win in Passmark GPU Compute (5,990 vs 5,646). These results indicate that the RX 6700S is the stronger card for general DirectX 12 gaming and compute-oriented tasks.

The results are not one-sided, though. The RX 6600M wins the 3DMark Steel Nomad DX12 test with a score of 1,495 against 1,451, a 3% margin. It also edges out the RX 6700S in Passmark DirectX 11 (136 vs 134, a 1.5% gain) and ties it in Passmark DirectX 10 at 87 points. In the remaining tests, the RX 6700S holds narrower leads: 4.5% in Geekbench OpenCL (70,965 vs 67,765), 3.2% in Geekbench Vulkan (76,150 vs 73,740), 5.6% in Passmark DirectX 9 (195 vs 184), and 1.5% in Passmark G2D (739 vs 728).

Looking at the average benchmark scores, the RX 6600M posts an average of 23,273, which places it in the 68th percentile of all GPUs. The RX 6700S has a slightly lower average of 22,154, putting it in the 67th percentile. The RX 6600M’s nearest rival, the AMD Radeon R9 M290X, scores 23,276, a 0% delta. The RX 6700S’s closest competitor, the AMD Radeon RX 5700, scores 22,170, a -0.1% delta. This data shows that while the RX 6600M has a higher average, both cards sit in the same performance tier relative to the broader GPU landscape.

The Verdict

The data presents a nuanced picture. The RX 6600M is the clear winner for Metal API performance, where its 26.6% lead over the RX 6700S is substantial. It also holds a slight edge in the modern 3DMark Steel Nomad DX12 test and in DirectX 11. This makes it the preferable choice for users whose primary workload leverages the Metal API or who prioritize that specific 3DMark benchmark.

The RX 6700S, however, is the more consistent performer across the board. It wins the majority of benchmarks, including the critical Passmark G3D (DirectX 10/11/12 gaming) and GPU Compute tests. Its 10.3% lead in DirectX 12 is notable, and its 7.5% lead in G3D suggests a tangible advantage in real-world gaming scenarios that rely on that API. The RX 6700S also achieves this with a lower TDP of 80 W compared to the RX 6600M’s 100 W.

For a general-purpose gaming laptop GPU, the RX 6700S offers a better balance of performance and efficiency. The RX 6600M is a niche pick for Metal-specific workloads. The RX 6700S is the safer, more versatile choice for most users, offering wins in the majority of tests while consuming 20 W less power.

FAQ

Q: Which GPU has a higher average benchmark score?

A: The AMD Radeon RX 6600M has a higher average benchmark score of 23,273, compared to the RX 6700S’s 22,154.

Q: What is the largest performance difference between the two cards?

A: The largest difference is in the Geekbench Metal test, where the RX 6600M scores 92,237, a 26.6% lead over the RX 6700S’s 72,864.

Q: Which GPU performs better in DirectX 12 gaming tests?

A: The RX 6700S is the winner in DirectX 12. It scores 58 in Passmark DirectX 12 (a 10.3% lead) and 15,066 in Passmark G3D (a 7.5% lead).

Q: Do both GPUs have the same memory configuration?

A: Yes, both the RX 6600M and the RX 6700S feature 8 GB of GDDR6 memory on a 128-bit bus with 224.0 GB/s of bandwidth.

Q: Which GPU has a lower power consumption?

A: The RX 6700S has a lower TDP of 80 W, compared to the RX 6600M’s 100 W.

Q: How many benchmarks does each GPU win in the head-to-head comparison?

A: The RX 6700S wins 7 benchmarks, while the RX 6600M wins 4 benchmarks in the head-to-head comparison.

Specification Differences

The most significant specification difference is the TDP. The RX 6600M has a TDP of 100 W, while the RX 6700S has a TDP of 80 W, a 20 W difference that favors the latter in power efficiency.

Clock speeds also differ considerably. The RX 6600M has a base clock of 2068 MHz, a game clock of 2177 MHz, and a boost clock of 2416 MHz. The RX 6700S is clocked lower, with a base of 1700 MHz, a game clock of 1890 MHz, and a boost of 2000 MHz. These clocks directly affect compute throughput.

The pixel rate and texture rate reflect the clock differences. The RX 6600M achieves a pixel rate of 154.6 GPixel/s and a texture rate of 270.6 GTexel/s. The RX 6700S produces 128.0 GPixel/s and 224.0 GTexel/s. Similarly, the FP32 performance is 8.659 TFLOPS for the RX 6600M and 7.168 TFLOPS for the RX 6700S, with FP16 at 17.32 TFLOPS and 14.34 TFLOPS, respectively.

Both GPUs share the same PCIe 4.0 x8 bus interface, are integrated (IGP) with no power connectors, and have portable device dependent display outputs. Neither has a launch MSRP listed.

Architecture Differences

Both the RX 6600M and RX 6700S are built on the same fundamental architecture. They use the Navi 23 chip, are based on RDNA 2.0, and are fabricated on a 7 nm process at TSMC. Both have a die size of 237 mm² and integrate 11,060 million transistors, resulting in a transistor density of 46.7M / mm².

The core configurations are identical. Each has 1792 shading units, 112 texture mapping units, 64 ROPs, and 28 ray tracing cores. They also share the same API support, including DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

The key architectural difference is not in the design but in the operating points. The RX 6600M runs at higher clock speeds across the board, which explains its higher compute rates. However, the RX 6700S achieves its performance at a significantly lower TDP of 80 W. The memory subsystem is also identical: 8 GB of GDDR6 on a 128-bit bus with 1750 MHz memory clock (14 Gbps effective) and 224.0 GB/s bandwidth.

The release dates differ, with the RX 6600M launching on 2021-05-30 and the RX 6700S launching later on 2022-01-03. Both are end-of-life products and both succeeded the Polaris Mobile architecture.

Where Each One Wins

The RX 6600M is the definitive winner in Metal API scenarios, with a massive 26.6% lead in Geekbench Metal. It also wins in the 3DMark Steel Nomad DX12 test (3% lead) and Passmark DirectX 11 (1.5% lead), and ties in Passmark DirectX 10. This makes it the better choice for applications and games that are optimized for Metal, or for users who specifically value performance in those particular benchmark tests.

The RX 6700S wins in the majority of tests, including Passmark DirectX 12 (10.3% lead), Passmark DirectX 9 (5.6% lead), Passmark G3D (7.5% lead), and Passmark GPU Compute (5.7% lead). It also wins in Geekbench OpenCL (4.5% lead), Geekbench Vulkan (3.2% lead), and Passmark G2D (1.5% lead). This broad set of wins makes it the stronger all-around performer for general gaming, particularly with DirectX 12, and for compute-heavy workloads. Its lower TDP of 80 W also makes it a more efficient option for thinner and lighter laptops. For most gaming and general-purpose use, the RX 6700S is the superior choice.