AMD Radeon RX 6600 XT vs NVIDIA GeForce RTX 4060 Mobile Comparison

The AMD Radeon RX 6600 XT and NVIDIA GeForce RTX 4060 Mobile are closely matched desktop and laptop graphics solutions, but the data shows they serve different masters. The RX 6600 XT wins the overall benchmark count in the head-to-head comparison by a margin of 4 wins to 5, yet the RTX 4060 Mobile takes the more modern and demanding workloads. The RX 6600 XT holds a higher average benchmark score of 24442 compared to the RTX 4060 Mobile's 22729, and it sits in the 70th percentile of all GPUs versus the 67th percentile for its rival. However, the RTX 4060 Mobile is the newer, more efficient part with a 5 nm process node and a lower 115 W TDP, making it the pick for modern gaming and compute tasks, while the RX 6600 XT remains a strong choice for legacy API performance and 2D workloads.

The Verdict

The data points to a clear split: the NVIDIA GeForce RTX 4060 Mobile is the better choice for DirectX 12 and Vulkan gaming, while the AMD Radeon RX 6600 XT is the superior option for older DirectX titles and 2D desktop applications. The RTX 4060 Mobile demonstrates a commanding 19.1% lead in the Geekbench Vulkan test and a 16.4% advantage in the Passmark DirectX 12 test, indicating that its Ada Lovelace architecture is better optimized for contemporary graphics APIs. In contrast, the RX 6600 XT shows its strength in legacy scenarios, winning the Passmark DirectX 10 and DirectX 11 tests by 1.9% and 3.8% respectively, and it absolutely dominates in 2D performance with a 24.9% lead in the Passmark G2D test.

For users prioritizing raw compute in OpenCL, the RTX 4060 Mobile takes the win with a 10% advantage in Geekbench OpenCL, but the RX 6600 XT counters with a 10.3% lead in Passmark GPU Compute. The RTX 4060 Mobile is the more future-proof option given its active production status and newer release date, while the RX 6600 XT is end-of-life. However, the RX 6600 XT offers a higher pixel rate of 165.7 GPixel/s versus 90.72 GPixel/s, and a higher texture rate of 331.4 GTexel/s versus 181.4 GTexel/s, making it a rasterization powerhouse for less demanding titles.

Where Each One Wins

The RX 6600 XT wins in scenarios that stress fill-rate and legacy API compatibility. Its higher pixel rate of 165.7 GPixel/s and texture rate of 331.4 GTexel/s, combined with wins in Passmark DirectX 10, DirectX 11, G2D, and GPU Compute, make it the preferred choice for older game libraries and productivity tasks that rely on 2D acceleration. The data shows a 24.9% margin in G2D, which is the largest single victory for either card, indicating a substantial advantage in desktop rendering and basic 2D applications.

The RTX 4060 Mobile wins in modern gaming and compute scenarios. Its 19.1% lead in Geekbench Vulkan and 16.4% lead in Passmark DirectX 12 are the standout results, pointing to superior performance in current-generation game engines that use these APIs. Additionally, its 5.8% edge in Passmark G3D and 10% lead in Geekbench OpenCL make it the more versatile performer for overall 3D rendering and general-purpose GPU compute. The RTX 4060 Mobile also achieves a higher FP32 throughput of 11.61 TFLOPS, edging out the RX 6600 XT's 10.60 TFLOPS.

Architecture Differences

The two GPUs come from fundamentally different design philosophies. The RX 6600 XT is built on AMD's RDNA 2.0 architecture using a 7 nm process at TSMC, featuring a Navi 23 chip with 11,060 million transistors on a 237 mm² die. The RTX 4060 Mobile uses NVIDIA's Ada Lovelace architecture on a more advanced 5 nm process at TSMC, packing 18,900 million transistors into a smaller 159 mm² die. This results in a significantly higher transistor density for the NVIDIA part: 118.9M per mm² versus 46.7M per mm² for the AMD chip.

The core configurations differ markedly. The RX 6600 XT has 2048 shading units, 128 TMUs, and 64 ROPs, while the RTX 4060 Mobile has 3072 shading units, 96 TMUs, and 48 ROPs. The AMD card features 32 ray tracing cores, whereas the NVIDIA card has 24 RT cores and 96 tensor cores, giving it dedicated AI acceleration hardware that the RX 6600 XT lacks. FP16 performance also diverges: the RX 6600 XT achieves 21.21 TFLOPS with a 2:1 ratio, while the RTX 4060 Mobile delivers 11.61 TFLOPS at a 1:1 ratio. Both cards share 8 GB of GDDR6 memory on a 128-bit bus with 256.0 GB/s bandwidth and identical API support for DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The AMD Radeon RX 6600 XT has a higher average benchmark score of 24442, compared to the NVIDIA GeForce RTX 4060 Mobile's 22729, a difference that places the AMD card in the 70th percentile versus the 67th percentile for NVIDIA.

Q: How does the RTX 4060 Mobile perform in DirectX 12 compared to the RX 6600 XT?

A: The RTX 4060 Mobile is significantly ahead, winning the Passmark DirectX 12 test with a score of 73 against the RX 6600 XT's 61, a 16.4% advantage that indicates better support for modern gaming APIs.

Q: Is the RX 6600 XT better for older DirectX games?

A: Yes, the data shows the RX 6600 XT wins in legacy API tests, taking Passmark DirectX 10 with a score of 109 versus 107 and DirectX 11 with 163 versus 157, representing 1.9% and 3.8% leads respectively.

Q: What is the biggest performance margin in the head-to-head benchmarks?

A: The largest margin is in the Passmark G2D test, where the RX 6600 XT scores 912 against the RTX 4060 Mobile's 730, a 24.9% difference in favor of the AMD card for 2D performance.

Q: Which GPU has more shading units and what is the impact?

A: The RTX 4060 Mobile has 3072 shading units compared to 2048 on the RX 6600 XT, and this contributes to its higher FP32 performance of 11.61 TFLOPS versus 10.60 TFLOPS, though the AMD card compensates with higher pixel and texture rates.

Q: Does the RTX 4060 Mobile have AI acceleration hardware?

A: Yes, the RTX 4060 Mobile includes 96 tensor cores, a feature entirely absent from the RX 6600 XT, providing dedicated hardware for AI and machine learning workloads.

Head-to-Head Benchmarks

The most decisive victory for the RTX 4060 Mobile comes in the Geekbench Vulkan test, where it scores 89569 against the RX 6600 XT's 72417, a 19.1% margin that represents the largest performance gap in any 3D benchmark. This is followed closely by the Passmark DirectX 12 test, where the NVIDIA card wins 73 to 61, a 16.4% lead. The RTX 4060 Mobile also takes the Passmark DirectX 9 test with a score of 216 versus 194, a 10.2% advantage, and the Geekbench OpenCL test with 89420 versus 80503, a 10% margin. Its slowest win is in Passmark G3D, where it scores 17469 against 16461, a 5.8% edge.

The RX 6600 XT's strongest performance is in the Passmark G2D test, where it dominates with a score of 912 against 730, a 24.9% lead. It also wins Passmark GPU Compute with 7520 versus 6816, a 10.3% margin. In the legacy API tests, the AMD card edges ahead in Passmark DirectX 11 with 163 versus 157, a 3.8% difference, and in Passmark DirectX 10 with 109 versus 107, a 1.9% margin. These results paint a picture of a GPU that excels in 2D and compute tasks but falls behind in modern 3D rendering.

Specification Differences

The two cards diverge sharply on process technology and power requirements. The RX 6600 XT uses a 7 nm process with a TDP of 160 W and requires a 1x 8-pin power connector, while the RTX 4060 Mobile uses a 5 nm process with a lower 115 W TDP and no power connectors, being an IGP (integrated graphics processor) for laptops. The RX 6600 XT is a dual-slot card measuring 190 mm in length, 110 mm in height, and 40 mm in width, whereas the RTX 4060 Mobile has no listed dimensions due to its mobile nature.

Clock speeds differ, with the RX 6600 XT running at a base of 1968 MHz and boost of 2589 MHz, while the RTX 4060 Mobile operates at a base of 1545 MHz and boost of 1890 MHz. The AMD card also has a game clock of 2359 MHz, a feature absent from the NVIDIA part. Memory clocks are identical at 2000 MHz with 16 Gbps effective speed. The RX 6600 XT offers display outputs of 1x HDMI 2.1 and 3x DisplayPort 1.4a, while the RTX 4060 Mobile's outputs are listed as portable device dependent. The RX 6600 XT has a launch MSRP of 379 USD.