AMD Radeon RX 6600 LE vs AMD Radeon RX 7600M Comparison

# AMD Radeon RX 6600 LE vs AMD Radeon RX 7600M

The AMD Radeon RX 6600 LE and AMD Radeon RX 7600M represent two distinct generations of AMD mobile graphics, with the former hailing from the Radeon RX 6000 series (RDNA 2.0) and the latter from the Radeon RX 7000 series (RDNA 3.0). Despite sharing identical core counts in shading units, texture mapping units, and render output units, the data reveals that architectural advancements and clock strategies create a nuanced performance landscape. The RX 6600 LE posts a higher average benchmark score of 70,829 compared to the RX 7600M’s 63,775, yet the RX 7600M counters with a significantly higher FP32 throughput and a more power-efficient design. This analysis digs into what those numbers mean for real-world usage, drawing exclusively from the provided benchmark and specification data.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The AMD Radeon RX 6600 LE leads with an average benchmark score of 70,829, which is 11.1% higher than the RX 7600M’s 63,775. This places the RX 6600 LE in the 91st percentile of all GPUs, while the RX 7600M sits in the 89th percentile.

Q: How do the two compare in the Geekbench OpenCL test?

A: The RX 6600 LE wins the head-to-head Geekbench OpenCL test with a score of 69,229 against the RX 7600M’s 63,775, a delta of 8.6%. The RX 6600 LE also has a Geekbench Vulkan score of 72,428, which the RX 7600M lacks in its benchmark data.

Q: What are the key architectural differences between the two GPUs?

A: The RX 6600 LE uses the Navi 23 chip on RDNA 2.0 architecture fabricated on a 7 nm TSMC process, while the RX 7600M uses the Navi 33 chip on RDNA 3.0 architecture fabricated on a 6 nm TSMC process. The RX 7600M also carries the codename "Hotpink Bonefish" and belongs to the Navi Mobile generation.

Q: Which GPU has higher FP32 compute performance?

A: The RX 7600M delivers 17.27 TFLOPS of FP32 performance, which is 93.1% higher than the RX 6600 LE’s 8.942 TFLOPS. This is a substantial gap despite both having 1,792 shading units.

Q: How do power requirements differ between the two?

A: The RX 6600 LE has a TDP of 132 W and requires a 1x 8-pin power connector with a suggested PSU of 300 W, while the RX 7600M has a TDP of 90 W, uses no power connectors, and is an IGP (integrated graphics processor) form factor.

Q: What are the memory bandwidth differences?

A: The RX 7600M offers 256.0 GB/s of memory bandwidth, which is 14.3% higher than the RX 6600 LE’s 224.0 GB/s. Both use 8 GB of GDDR6 memory on a 128-bit bus, but the RX 7600M runs its memory at 2000 MHz (16 Gbps effective) versus 1750 MHz (14 Gbps effective).

Architecture Differences

The architectural divide between these two GPUs is generational, with the RX 6600 LE built on RDNA 2.0 and the RX 7600M on RDNA 3.0. The RX 6600 LE uses the Navi 23 chip, fabricated on a 7 nm TSMC process with 11,060 million transistors across a 237 mm² die, resulting in a transistor density of 46.7M per mm². In contrast, the RX 7600M employs the Navi 33 chip, fabricated on a 6 nm TSMC process with 13,300 million transistors on a smaller 204 mm² die, achieving a higher transistor density of 65.2M per mm². This represents a 20.3% increase in transistor count and a 39.6% increase in transistor density for the RX 7600M, despite its smaller physical footprint.

The clock speeds tell an interesting story. The RX 6600 LE has a higher base clock at 1626 MHz versus the RX 7600M’s 1500 MHz, and a higher boost clock at 2495 MHz versus 2410 MHz. However, the RX 7600M has a slightly higher game clock at 2070 MHz versus 2045 MHz. The RX 7600M also runs its memory at 2000 MHz (16 Gbps effective) compared to the RX 6600 LE’s 1750 MHz (14 Gbps effective), contributing to its higher memory bandwidth of 256.0 GB/s versus 224.0 GB/s.

The RX 7600M’s architectural leap is most evident in compute throughput. Despite identical shading units (1,792), TMUs (112), and ROPs (64), the RX 7600M achieves 17.27 TFLOPS of FP32 performance versus the RX 6600 LE’s 8.942 TFLOPS, a 93.1% difference. Similarly, FP16 performance is 34.55 TFLOPS on the RX 7600M versus 17.88 TFLOPS on the RX 6600 LE. Both GPUs feature 28 ray tracing cores, and neither has tensor cores. The RX 7600M’s pixel rate is 154.2 GPixel/s, slightly lower than the RX 6600 LE’s 159.7 GPixel/s, and its texture rate is 269.9 GTexel/s versus 279.4 GTexel/s.

The RX 7600M also differs in bus interface, using PCIe 4.0 x16 versus the RX 6600 LE’s PCIe 4.0 x8. The RX 6600 LE is a dual-slot card with dimensions of 190 mm length, 110 mm height, and 40 mm width, while the RX 7600M is an IGP with no specified dimensions and portable device dependent display outputs. The RX 6600 LE offers 1x HDMI 2.1 and 3x DisplayPort 1.4a outputs, whereas the RX 7600M’s outputs are portable device dependent. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Head-to-Head Benchmarks

The head-to-head benchmark data contains a single Geekbench OpenCL test, which the RX 6600 LE wins decisively. The RX 6600 LE scores 69,229 against the RX 7600M’s 63,775, a delta of 8.6%. This result is notable because it contradicts what one might expect from the raw compute specifications, where the RX 7600M holds a massive 93.1% advantage in FP32 TFLOPS. The benchmark results indicate that raw compute throughput does not directly translate to OpenCL performance, likely due to differences in clock stability, memory latency, or driver optimization.

Looking at the broader benchmark context, the RX 6600 LE also has a Geekbench Vulkan score of 72,428, which is not available for the RX 7600M. This additional data point suggests that the RX 6600 LE’s performance is consistent across different APIs, while the RX 7600M’s lone OpenCL score leaves its Vulkan capabilities unmeasured. The RX 6600 LE’s average benchmark score of 70,829 further reinforces its lead, placing it in the 91st percentile of all GPUs, while the RX 7600M’s 89th percentile reflects its lower 63,775 average.

The nearest rivals for each GPU provide additional context. The RX 6600 LE sits within 1.4% of the AMD Radeon Pro WX 8200 (69,870) and within 1.2% of the NVIDIA Quadro P6000 (69,986), while trailing the AMD Radeon RX 6650M (71,768) by 1.3%. The RX 7600M is closely matched with the AMD Radeon RX 9060 XT LP (63,830) and NVIDIA CMP 30HX (63,842), both within 0.1%, and the AMD Radeon Pro Vega 56 (63,693) within 0.1%. This proximity suggests that the RX 7600M’s performance class is tightly clustered, whereas the RX 6600 LE edges out its immediate competitors.

The delta of 8.6% in the head-to-head test is significant, as it represents a clear win for the RX 6600 LE in the only directly comparable benchmark. However, the limited scope of the head-to-head data means that other workloads—particularly those leveraging FP32 or FP16 compute—could favor the RX 7600M. The data shows one win for the RX 6600 LE and zero for the RX 7600M, but the underlying specifications suggest a more complex picture.

Specification Differences

The two GPUs differ across nearly every major specification category, with the notable exception of memory size, type, bus width, shading units, TMUs, ROPs, and ray tracing cores. Both feature 8 GB of GDDR6 memory on a 128-bit bus, 1,792 shading units, 112 TMUs, 64 ROPs, and 28 ray tracing cores. The memory configuration diverges in clock speed and bandwidth: the RX 7600M runs at 2000 MHz with 256.0 GB/s bandwidth, while the RX 6600 LE runs at 1750 MHz with 224.0 GB/s bandwidth.

The chip design differs fundamentally: the RX 6600 LE uses Navi 23 on a 7 nm process with 11,060 million transistors and a 237 mm² die, while the RX 7600M uses Navi 33 on a 6 nm process with 13,300 million transistors and a 204 mm² die. The RX 7600M’s transistor density of 65.2M per mm² is significantly higher than the RX 6600 LE’s 46.7M per mm². Clock speeds differ in base (1626 MHz vs 1500 MHz), boost (2495 MHz vs 2410 MHz), and game (2045 MHz vs 2070 MHz) frequencies, with the RX 6600 LE winning on base and boost but losing on game clock.

Compute performance diverges sharply: the RX 7600M delivers 17.27 TFLOPS FP32 and 34.55 TFLOPS FP16, versus the RX 6600 LE’s 8.942 TFLOPS FP32 and 17.88 TFLOPS FP16. Pixel and texture rates favor the RX 6600 LE slightly, at 159.7 GPixel/s and 279.4 GTexel/s versus 154.2 GPixel/s and 269.9 GTexel/s. Power consumption is a major differentiator: the RX 6600 LE has a TDP of 132 W with a 1x 8-pin connector and 300 W suggested PSU, while the RX 7600M has a TDP of 90 W with no power connectors and no suggested PSU.

Form factor and connectivity also differ: the RX 6600 LE is a dual-slot card measuring 190 mm by 110 mm by 40 mm, with 1x HDMI 2.1 and 3x DisplayPort 1.4a outputs, while the RX 7600M is an IGP with no dimensions and portable device dependent outputs. The RX 6600 LE uses PCIe 4.0 x8, while the RX 7600M uses PCIe 4.0 x16. The RX 6600 LE has a predecessor of Navi and successor of Navi III, while the RX 7600M’s predecessor is Polaris Mobile with no successor. Release dates differ by nearly a year, with the RX 6600 LE launching on December 7, 2023, and the RX 7600M on January 3, 2023.

The Verdict

The data presents a clear but nuanced verdict. The AMD Radeon RX 6600 LE is the stronger performer in the benchmark that matters most here: the Geekbench OpenCL test, where it wins by 8.6% with a score of 69,229 versus 63,775. Its average benchmark score of 70,829 is 11.1% higher than the RX 7600M’s 63,775, and its 91st percentile ranking versus the RX 7600M’s 89th percentile confirms its overall superiority in measured performance. For users prioritizing raw benchmark results, the RX 6600 LE is the clear choice.

However, the RX 7600M offers compelling advantages in other dimensions. Its FP32 compute performance of 17.27 TFLOPS is nearly double the RX 6600 LE’s 8.942 TFLOPS, making it potentially better suited for compute-heavy workloads that leverage this throughput. Its 90 W TDP is 31.8% lower than the RX 6600 LE’s 132 W, and its IGP form factor with no power connectors makes it far more suitable for thin-and-light laptops where power and space are at a premium. The RX 7600M also has higher memory bandwidth at 256.0 GB/s versus 224.0 GB/s, which could benefit bandwidth-sensitive applications.

The verdict depends on the use case. For gaming or general GPU-accelerated tasks where OpenCL performance is representative, the RX 6600 LE wins based on benchmark data. For compute-intensive applications that can exploit FP32 or FP16 throughput, or for ultra-portable devices requiring minimal power draw, the RX 7600M’s specifications make it the more logical choice, despite its lower benchmark score. The RX 6600 LE’s higher base and boost clocks, combined with its benchmark dominance, suggest better real-world responsiveness in typical workloads.

Where Each One Wins

The AMD Radeon RX 6600 LE wins in measured benchmark performance, holding a 8.6% lead in Geekbench OpenCL and a 11.1% lead in average benchmark score. Its higher base clock (1626 MHz vs 1500 MHz) and boost clock (2495 MHz vs 2410 MHz) likely contribute to this advantage, as does its slightly higher pixel rate (159.7 GPixel/s vs 154.2 GPixel/s) and texture rate (279.4 GTexel/s vs 269.9 GTexel/s). The RX 6600 LE also offers the additional Geekbench Vulkan score of 72,428, demonstrating strong performance across multiple APIs. Its dual-slot form factor with dedicated display outputs (1x HDMI 2.1, 3x DisplayPort 1.4a) makes it suitable for desktop or larger laptop implementations where space is less constrained.

The AMD Radeon RX 7600M wins in compute throughput and power efficiency. Its FP32 performance of 17.27 TFLOPS is 93.1% higher than the RX 6600 LE, and its FP16 performance of 34.55 TFLOPS is similarly dominant. This makes it the better option for workloads that can leverage raw compute power, such as machine learning inference, scientific simulations, or content creation tasks that use FP32/FP16 paths. Its 90 W TDP is 31.8% lower than the RX 6600 LE’s 132 W, and its IGP form factor with no power connectors enables deployment in ultra-thin laptops where the RX 6600 LE’s 190 mm length and 40 mm width would be impractical. The RX 7600M’s higher memory bandwidth (256.0 GB/s vs 224.0 GB/s) and PCIe 4.0 x16 interface provide additional advantages for data-intensive applications. Its game clock of 2070 MHz also edges out the RX 6600 LE’s 2045 MHz, suggesting potential in gaming scenarios despite the benchmark deficit.