AMD Radeon RX 6600M vs NVIDIA GeForce RTX 3070 Mobile Comparison

Head-to-Head Benchmarks

The benchmark database records ten direct comparisons between the AMD Radeon RX 6600M and the NVIDIA GeForce RTX 3070 Mobile, with NVIDIA taking eight wins and AMD taking two. The most decisive NVIDIA victory comes in the 3DMark Steel Nomad DX12 test, where the RTX 3070 Mobile scores 2380 against the RX 6600M's 1495, a 37.2 percent gap. That is the single largest margin in the entire comparison and signals a fundamental performance tier difference in modern DirectX 12 workloads.

The Geekbench OpenCL result follows a similar pattern, with NVIDIA scoring 92939 versus AMD's 67765, a 27.1 percent deficit for the Radeon. In Geekbench Vulkan, the gap narrows to 15 percent, with NVIDIA at 86768 and AMD at 73740. These compute-oriented tests show NVIDIA maintaining a clear lead, though the Vulkan result suggests AMD's RDNA 2 architecture is relatively stronger in that API than in OpenCL.

The PassMark suite tells a more nuanced story. In PassMark G3D, the headline gaming metric, NVIDIA wins 15309 to 13929, a 9 percent margin. That is a meaningful but not overwhelming advantage. In PassMark GPU Compute, NVIDIA extends its lead to 17.3 percent, scoring 6827 versus 5646. The older DirectX tests show a mixed bag: NVIDIA wins DirectX 10 by 23 percent (113 to 87), DirectX 12 by 18.7 percent (64 to 52), and DirectX 11 by a razor-thin 1.4 percent (138 to 136). AMD takes DirectX 9 by 15 percent (184 to 160) and the 2D graphics test by 13.6 percent (728 to 641).

The DirectX 11 result deserves attention. A 1.4 percent difference is within noise territory, meaning the two GPUs are effectively tied in that legacy API. The DirectX 9 win for AMD is notable because it shows RDNA 2 retains strong performance in older titles, while NVIDIA's Ampere architecture appears comparatively weaker there. The 2D test win for AMD is less impactful for gaming but does indicate better raw rasterization throughput in certain non-3D workloads.

Looking at the overall average benchmark scores in the database, the RX 6600M posts an average of 23273 across all recorded tests, while the RTX 3070 Mobile averages 20534. That is counterintuitive given NVIDIA's head-to-head dominance, but it reflects the different benchmark mixes and the fact that AMD's score is buoyed by strong showings in tests where NVIDIA does not compete as well. The percentile rankings confirm the parity: AMD sits at the 68th percentile of all GPUs, NVIDIA at the 65th.

The Verdict

The data points to a clear conclusion for modern gaming and compute: the NVIDIA GeForce RTX 3070 Mobile is the stronger performer. It wins the most important benchmarks, including the DirectX 12 Steel Nomad test, OpenCL compute, Vulkan, G3D, and GPU compute. The 37.2 percent margin in Steel Nomad is decisive, and the 27.1 percent OpenCL gap reinforces NVIDIA's advantage in general-purpose compute.

The AMD Radeon RX 6600M is not without merit. It wins DirectX 9 and 2D tests, and it nearly matches NVIDIA in DirectX 11. For users whose workloads concentrate on older DirectX APIs or 2D graphics, the Radeon holds its own. However, those scenarios are increasingly rare in modern gaming, where DirectX 12 and Vulkan dominate.

The database also shows that the RX 6600M has a higher average benchmark score and a higher percentile ranking than the RTX 3070 Mobile, which complicates a simple "NVIDIA wins" narrative. The average score of 23273 for AMD versus 20534 for NVIDIA suggests that across a broad suite of tests, AMD performs better than its head-to-head results would imply. The RTX 3070 Mobile's nearest rivals in the database include the Intel Arc B570 and Arc A750, both within 0.2 percent, while the RX 6600M sits alongside the AMD Radeon R9 M290X and Radeon Pro Vega 16 with essentially identical scores. This indicates that the two mobile GPUs occupy different positions in the overall performance distribution despite their head-to-head mismatch.

For a buyer prioritizing raw performance in current-generation titles and compute tasks, the RTX 3070 Mobile is the data-backed choice. For a buyer with legacy software needs or a preference for AMD's architecture, the RX 6600M offers competitive performance in specific niches but falls behind where it matters most today.

Architecture Differences

The two GPUs come from different foundries and process nodes. AMD's Navi 23 chip is built on a 7 nm process at TSMC, while NVIDIA's GA104 uses an 8 nm process at Samsung. The transistor counts reflect the scale difference: AMD packs 11,060 million transistors into a 237 mm² die, yielding a density of 46.7 million transistors per square millimeter. NVIDIA fits 17,400 million transistors into a 392 mm² die, with a slightly lower density of 44.4 million per square millimeter. The larger die and higher transistor count give NVIDIA more hardware resources, but the density figures show AMD achieves comparable packing efficiency on a smaller chip.

The RX 6600M uses RDNA 2.0 architecture with 1792 shading units, 112 texture mapping units, and 64 raster operation units. It also includes 28 ray tracing cores. The RTX 3070 Mobile uses Ampere with 5120 shading units, 160 TMUs, and 80 ROPs, plus 40 ray tracing cores and 160 tensor cores. NVIDIA's shading unit count is nearly three times AMD's, which explains its raw compute advantage. The FP32 throughput numbers confirm this: NVIDIA delivers 15.97 TFLOPS versus AMD's 8.659 TFLOPS. NVIDIA's FP16 performance is identical to its FP32 at 15.97 TFLOPS with a 1:1 ratio, while AMD achieves 17.32 TFLOPS in FP16 using a 2:1 ratio, meaning its FP16 output is more than double its FP32.

Memory configurations differ substantially. Both use 8 GB of GDDR6, but the RTX 3070 Mobile runs a 256-bit bus with 448.0 GB/s bandwidth, exactly double the RX 6600M's 128-bit bus and 224.0 GB/s. The memory clock is the same at 1750 MHz, equivalent to 14 Gbps effective, so the bandwidth difference comes entirely from bus width. This gives NVIDIA a significant advantage in memory-heavy workloads at high resolutions.

Clock speeds tell a different story. AMD's base clock is 2068 MHz with a boost of 2416 MHz and a game clock of 2177 MHz. NVIDIA's base clock is much lower at 1110 MHz with a boost of 1560 MHz. Despite the lower clocks, NVIDIA's massive shading unit count overwhelms AMD's frequency advantage. The pixel rate favors AMD at 154.6 GPixel/s versus NVIDIA's 124.8 GPixel/s, but the texture rate is close: AMD at 270.6 GTexel/s versus NVIDIA at 249.6 GTexel/s. AMD's higher clocks and smaller die help it in these specific throughput metrics.

Power consumption also diverges. The RX 6600M has a TDP of 100 W, while the RTX 3070 Mobile draws 115 W. Both are listed as IGP or portable device dependent for slot width and display outputs, and neither uses external power connectors. The bus interface differs: AMD uses PCIe 4.0 x8, NVIDIA uses PCIe 4.0 x16, giving NVIDIA more bandwidth to the host system.

Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. NVIDIA adds tensor cores for AI workloads, a feature AMD lacks in this chip. The release dates are close: NVIDIA launched January 2021, AMD followed May 2021. Both are end-of-life products, with AMD succeeding Polaris Mobile and NVIDIA succeeding GeForce 20 Mobile.

FAQ

Q: Which GPU wins in DirectX 12 performance?

A: The NVIDIA GeForce RTX 3070 Mobile wins decisively. In the 3DMark Steel Nomad DX12 test, it scores 2380 versus AMD's 1495, a 37.2 percent advantage. In PassMark DirectX 12, NVIDIA leads 64 to 52, an 18.7 percent margin.

Q: Does the AMD Radeon RX 6600M win any benchmarks?

A: Yes, it wins two of ten head-to-head tests. It takes PassMark DirectX 9 by 15 percent (184 to 160) and PassMark G2D by 13.6 percent (728 to 641). It also nearly ties in DirectX 11, losing by only 1.4 percent (136 to 138).

Q: What is the memory bandwidth difference?

A: The RTX 3070 Mobile has 448.0 GB/s bandwidth on a 256-bit bus, while the RX 6600M has 224.0 GB/s on a 128-bit bus. Both use 8 GB of GDDR6 at 1750 MHz, which equals 14 Gbps effective.

Q: How do the average benchmark scores compare?

A: The RX 6600M averages 23273 across all recorded tests, placing it at the 68th percentile of all GPUs. The RTX 3070 Mobile averages 20534, at the 65th percentile. Despite losing most head-to-head tests, AMD has a higher overall average.

Q: Which GPU has more shading units?

A: The RTX 3070 Mobile has 5120 shading units, compared to the RX 6600M's 1792. NVIDIA also has 160 tensor cores and 40 ray tracing cores, while AMD has 28 ray tracing cores and no tensor cores.

Q: What is the power draw difference?

A: The RX 6600M has a TDP of 100 W, while the RTX 3070 Mobile is rated at 115 W. Both are portable device dependent for display outputs and use no external power connectors.

Where Each One Wins

The NVIDIA GeForce RTX 3070 Mobile is the clear winner for modern gaming and compute. Its 37.2 percent lead in 3DMark Steel Nomad DX12 makes it the choice for DirectX 12 titles, and the 27.1 percent OpenCL advantage suits compute workloads that rely on that API. The Vulkan win of 15 percent covers another major modern API. For GPU compute tasks like rendering or machine learning inference, the 17.3 percent PassMark GPU Compute lead and the presence of 160 tensor cores make NVIDIA the data-backed option. The G3D win of 9 percent, while smaller, still favors NVIDIA for general 3D gaming performance.

The AMD Radeon RX 6600M wins in legacy and 2D scenarios. The DirectX 9 victory by 15 percent means older games that use that API will run better on AMD hardware. The G2D win by 13.6 percent covers 2D graphics workloads, though these are rarely performance-critical. The near-tie in DirectX 11 suggests AMD matches NVIDIA for the large library of DirectX 11 titles, so users focused on that API will not lose much by choosing AMD. The higher average benchmark score and 68th percentile ranking also indicate that AMD's overall performance profile is competitive across a wider benchmark suite, even if it loses the specific head-to-head tests that matter most for current gaming.

For power-conscious users, the RX 6600M's 100 W TDP versus NVIDIA's 115 W gives AMD a modest efficiency edge, though the performance gap in modern tests may outweigh that benefit. The smaller die and lower transistor count also suggest AMD's chip is cheaper to produce, but price data is not recorded in the database. Ultimately, the RTX 3070 Mobile is the pick for anyone prioritizing contemporary gaming performance and compute throughput, while the RX 6600M serves well for legacy API workloads and 2D tasks where its specific strengths shine.