AMD Radeon Pro W6600M vs AMD Radeon RX 6650M XT Comparison

FAQ

Q: What is the performance difference between the AMD Radeon RX 6650M XT and the AMD Radeon Pro W6600M in OpenCL benchmarks?

A: The RX 6650M XT scores 76,904 in Geekbench OpenCL, while the Pro W6600M scores 56,140. This gives the RX 6650M XT a 37% advantage in that test.

Q: Which GPU has a higher percentile ranking among all GPUs?

A: The RX 6650M XT ranks in the 91st percentile, while the Pro W6600M ranks in the 89th percentile. Both are high performers, but the RX 6650M XT sits slightly higher in the distribution.

Q: Do both GPUs use the same physical chip?

A: Yes, both are built on the Navi 23 chip using RDNA 2.0 architecture. They share the same 7 nm process node from TSMC, the same 11,060 million transistor count, and the same 237 mm² die size.

Q: What is the difference in shading units and ray tracing cores?

A: The RX 6650M XT has 2048 shading units and 32 ray tracing cores. The Pro W6600M has 1792 shading units and 28 ray tracing cores. The RX 6650M XT carries 256 more shading units and 4 additional RT cores.

Q: How do the boost clocks compare between the two cards?

A: The RX 6650M XT has a base clock of 2068 MHz and a boost clock of 2416 MHz. The Pro W6600M has a base clock of 1224 MHz and a boost clock of 2034 MHz. The RX 6650M XT runs at significantly higher clock speeds.

Q: Which card has higher memory bandwidth?

A: The RX 6650M XT has 256.0 GB/s of bandwidth, while the Pro W6600M has 224.0 GB/s. Both use 8 GB of GDDR6 memory on a 128-bit bus, but the RX 6650M XT uses faster 16 Gbps effective memory versus 14 Gbps on the Pro W6600M.

Architecture Differences

Both GPUs are built on the same fundamental architecture, RDNA 2.0, and share the same Navi 23 chip. The manufacturing process is identical: 7 nm at TSMC, with the same transistor count of 11,060 million and a die size of 237 mm². The transistor density is also the same at 46.7M per mm². This means the architectural lineage is the same, but the implementation differs significantly.

The RX 6650M XT is configured with the full complement of the Navi 23 design: 2048 shading units, 128 texture mapping units, and 64 raster output units. It also carries 32 ray tracing cores. The Pro W6600M, by contrast, uses a reduced configuration with 1792 shading units, 112 TMUs, and 64 ROPs, along with 28 ray tracing cores. The RX 6650M XT therefore has a 14.3% advantage in shading unit count and a similar proportional increase in TMUs, while ROPs are equal.

Clock behavior is another major architectural distinction. The RX 6650M XT operates with a base clock of 2068 MHz and a boost clock of 2416 MHz, with a game clock of 2162 MHz. The Pro W6600M has a much lower base clock of 1224 MHz and a boost clock of 2034 MHz, with no game clock listed. This clock disparity drives substantial differences in raw throughput. The pixel rate for the RX 6650M XT is 154.6 GPixel/s versus 130.2 GPixel/s for the Pro W6600M. Texture rate follows a similar pattern: 309.2 GTexel/s versus 227.8 GTexel/s.

Memory configuration is close but not identical. Both cards use 8 GB of GDDR6 on a 128-bit bus. However, the RX 6650M XT runs memory at 2000 MHz (16 Gbps effective) yielding 256.0 GB/s, while the Pro W6600M runs at 1750 MHz (14 Gbps effective) yielding 224.0 GB/s. The RX 6650M XT thus has a 14.3% bandwidth advantage.

The bus interface differs as well. The RX 6650M XT uses PCIe 4.0 x8, while the Pro W6600M uses PCIe 4.0 x16. The Pro W6600M has double the PCIe lanes, which may matter for certain data-transfer workloads. Both cards consume no external power connectors and are listed as IGP slot width, meaning they are integrated into mobile platforms.

Power draw is a notable difference. The RX 6650M XT has a TDP of 120 W, while the Pro W6600M has a TDP of 90 W. The RX 6650M XT uses 30 W more power to achieve its higher performance levels. Both support the same API set: DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Head-to-Head Benchmarks

The database contains a single head-to-head benchmark comparison between these two GPUs, and it is the Geekbench OpenCL test. In this measurement, the RX 6650M XT scores 76,904 points, while the Pro W6600M scores 56,140 points. The delta is 37% in favor of the RX 6650M XT. This is a decisive win, indicating that the RX 6650M XT is substantially faster in compute workloads that stress OpenCL performance.

To contextualize this result, the RX 6650M XT's score of 76,904 places it just 1% behind the NVIDIA GeForce RTX 5090 D, which averages 77,712. It is also 2.6% behind the AMD Radeon RX 6850M XT (78,940) and 3.1% behind the NVIDIA Tesla P100 PCIe 12 GB (79,396). The RX 6650M XT sits within a tight cluster of high-end GPUs, meaning its OpenCL performance is competitive with some of the fastest accelerators available.

The Pro W6600M's score of 56,140 tells a different story. It is 0.3% behind the AMD Radeon 8050S (62,108), which is its closest rival. It is actually 2.6% ahead of the NVIDIA GeForce RTX 4090 (60,347) and the Intel Arc Pro A60 (60,326), and 2.9% ahead of the AMD Radeon Pro Vega 48 (60,140). This means the Pro W6600M, despite being a mobile professional GPU, outperforms some desktop flagship cards in this particular OpenCL test.

The gap between the two AMD cards is significant. The 37% delta in OpenCL performance is larger than the difference in shading units alone would suggest, indicating that the higher clocks and memory bandwidth of the RX 6650M XT compound the compute advantage. The RX 6650M XT wins the only head-to-head benchmark recorded, giving it a 1-0 record in the database.

Specification Differences

The two GPUs differ in several key specification fields. The clock speeds are the most pronounced difference. The RX 6650M XT has a base clock of 2068 MHz, a boost clock of 2416 MHz, and a game clock of 2162 MHz. The Pro W6600M has a base clock of 1224 MHz and a boost clock of 2034 MHz, with no game clock listed.

Memory clock differs as well. The RX 6650M XT runs at 2000 MHz with 16 Gbps effective speed, while the Pro W6600M runs at 1750 MHz with 14 Gbps effective speed. This yields a bandwidth difference of 256.0 GB/s versus 224.0 GB/s.

The compute unit configuration is different. The RX 6650M XT has 2048 shading units, 128 TMUs, and 32 ray tracing cores. The Pro W6600M has 1792 shading units, 112 TMUs, and 28 ray tracing cores. Both have 64 ROPs.

Throughput figures are higher on the RX 6650M XT: pixel rate of 154.6 GPixel/s versus 130.2 GPixel/s, and texture rate of 309.2 GTexel/s versus 227.8 GTexel/s. FP32 compute is 9.896 TFLOPS versus 7.290 TFLOPS, and FP16 is 19.79 TFLOPS versus 14.58 TFLOPS, both at a 2:1 ratio.

The TDP is 120 W for the RX 6650M XT and 90 W for the Pro W6600M. The bus interface is PCIe 4.0 x8 for the RX 6650M XT and PCIe 4.0 x16 for the Pro W6600M. The generation labels differ: the RX 6650M XT belongs to the Navi Mobile (RX 6000M) generation, while the Pro W6600M belongs to the Radeon Pro Mobile (W6x00M) generation. Production status is end-of-life for both. The RX 6650M XT was released on 2022-01-03, while the Pro W6600M was released on 2021-06-07. The predecessor series also differ: Polaris Mobile for the RX 6650M XT and FirePro Mobile for the Pro W6600M.

The Verdict

The recorded data shows a clear performance hierarchy. The RX 6650M XT outperforms the Pro W6600M by 37% in the only head-to-head benchmark available. This is a substantial margin, driven by higher clock speeds, more shading units, more ray tracing cores, and higher memory bandwidth. The RX 6650M XT's OpenCL score of 76,904 places it in the 91st percentile of all GPUs, while the Pro W6600M's score of 56,140 places it in the 89th percentile.

However, the choice between these two GPUs depends on the intended workload profile. The RX 6650M XT is the faster card by a wide margin in raw compute. It belongs to the Radeon RX 6000 series, which is oriented toward general graphics and gaming performance. Its higher TDP of 120 W indicates a more power-hungry design that prioritizes throughput.

The Pro W6600M, with its 90 W TDP and lower clock speeds, is a more power-efficient design. It belongs to the Radeon Pro Mobile series, which is traditionally positioned for professional workstation applications. Its PCIe 4.0 x16 interface, double the lane width of the RX 6650M XT's x8 interface, may benefit certain professional workloads that require high data transfer rates. The Pro W6600M also has a Vulkan benchmark score of 67,652 that the RX 6650M XT lacks in the database, indicating at least one measurable capability in that API.

For users prioritizing maximum compute performance in OpenCL workloads, the RX 6650M XT is the clear choice. The 37% delta is decisive and consistent with the specification differences. For users prioritizing lower power consumption and a wider PCIe interface, the Pro W6600M has structural advantages, though it sacrifices significant compute throughput.

The data does not support a recommendation for the Pro W6600M on raw performance grounds. The RX 6650M XT wins the only direct comparison. The Pro W6600M's advantages are in areas not directly measured by the head-to-head benchmarks: power efficiency and bus bandwidth.

Where Each One Wins

The RX 6650M XT wins in raw compute performance. Its OpenCL score is 37% higher, its FP32 throughput is 9.896 TFLOPS versus 7.290 TFLOPS, and its texture rate is 309.2 GTexel/s versus 227.8 GTexel/s. It also has a higher pixel rate at 154.6 GPixel/s versus 130.2 GPixel/s. These numbers indicate that the RX 6650M XT is better suited for compute-heavy tasks, high-resolution rendering, and generally demanding graphics workloads. Its higher memory bandwidth of 256.0 GB/s versus 224.0 GB/s further supports this advantage.

The Pro W6600M wins in power efficiency and bus connectivity. Its TDP is 90 W versus 120 W for the RX 6650M XT, meaning it draws 25% less power. This makes it a more suitable option for thinner mobile platforms with tighter thermal budgets. Its PCIe 4.0 x16 interface provides twice the lane count of the RX 6650M XT's PCIe 4.0 x8 interface, which could benefit workloads that move large amounts of data between the GPU and system memory. The Pro W6600M also has a recorded Vulkan score of 67,652, a benchmark that does not appear for the RX 6650M XT in the database.

In terms of percentile rankings, the RX 6650M XT sits at the 91st percentile versus the 89th percentile for the Pro W6600M. The RX 6650M XT's nearest rivals include the NVIDIA GeForce RTX 5090 D (1% ahead), the AMD Radeon RX 6850M XT (2.6% ahead), and two NVIDIA Tesla P100 variants (3.1% and 3.4% ahead). The Pro W6600M's nearest rivals include the AMD Radeon 8050S (0.3% ahead), the NVIDIA GeForce RTX 4090 (2.6% behind), the Intel Arc Pro A60 (2.6% behind), and the AMD Radeon Pro Vega 48 (2.9% behind). The proximity of these rivals shows that both GPUs are competitive within their respective performance tiers, but the RX 6650M XT operates in a higher tier overall.

The use-case split is straightforward. The RX 6650M XT is the appropriate choice for scenarios where maximum OpenCL compute performance is required and power consumption is a secondary concern. The Pro W6600M is the appropriate choice for scenarios where lower power draw, a wider PCIe interface, and professional mobile lineage are more important than raw throughput. Neither card is a clear winner across all criteria, but the benchmark data favors the RX 6650M XT for measurable performance.