AMD Radeon RX 6550S vs AMD Ryzen Z2 A GPU Comparison

Where Each One Wins

The recorded data shows two AMD graphics solutions built on the same RDNA 2.0 architecture, but they are positioned for entirely different workloads. The Radeon RX 6550S is a discrete-class mobile GPU from the Radeon RX 6000 series, while the Ryzen Z2 A GPU is a console-class integrated graphics processor. Neither part has benchmark entries in the database, so the wins here are structural rather than measured. The RX 6550S wins on raw compute throughput, pixel throughput, texture throughput, and ray tracing capability. The Ryzen Z2 A GPU wins on memory capacity, power efficiency per watt, and physical integration.

The RX 6550S produces 4.915 TFLOPS of FP32 compute against the Ryzen Z2 A GPU's 1.638 TFLOPS. That is a 3.0x advantage in raw shader math. The RX 6550S also delivers 76.80 GPixel/s of pixel rate versus 25.60 GPixel/s, a 3.0x lead in fill-rate bound scenes. Texture rate follows the same pattern: 153.6 GTexel/s compared to 51.20 GTexel/s, again a 3.0x margin. The RX 6550S has 1024 shading units, 64 texture mapping units, and 32 render output units. The Ryzen Z2 A GPU has half of each: 512 shading units, 32 TMUs, and 16 ROPs. For ray tracing, the RX 6550S carries 16 ray accelerators against the Ryzen Z2 A GPU's 8, so geometrically it has double the ray tracing hardware.

The Ryzen Z2 A GPU wins on memory configuration. It has 16 GB of LPDDR5 memory on a 128-bit bus, delivering 102.4 GB/s of bandwidth. The RX 6550S has only 4 GB of GDDR6 on a 64-bit bus, which gives 128.0 GB/s. The Z2 A actually has higher total memory capacity by 4x, though its bandwidth is lower by a 1.25x margin. The Z2 A GPU also runs at a dramatically lower power envelope: 15 W versus 50 W for the RX 6550S. That means the Z2 A GPU delivers its 1.638 TFLOPS at under one-third the power draw, making it the efficiency winner in battery-constrained or thermally constrained designs.

The Z2 A GPU also wins on process integration context, though not on process technology itself. It uses a 7 nm process from TSMC with 2,400 million transistors on a 163 mm² die. The RX 6550S uses a more advanced 6 nm process from TSMC, packing 5,400 million transistors into just 107 mm². The transistor density tells the story: 50.5 million transistors per square millimeter for the RX 6550S versus 14.7 million per square millimeter for the Z2 A GPU. The RX 6550S is the denser chip, but the Z2 A GPU is the larger, lower-power part designed to share a package with a CPU.

Architecture Differences

Both GPUs share the RDNA 2.0 architecture, but they come from different generations and design intents. The RX 6550S uses the Navi 24 chip, part of the Navi Mobile (RX 6000M) generation. The Ryzen Z2 A GPU uses the Van Gogh chip, classified as a Console GPU (AMD). Both are manufactured by TSMC, but on different nodes: the RX 6550S is on 6 nm while the Z2 A GPU is on 7 nm.

The transistor counts diverge significantly. The RX 6550S contains 5,400 million transistors, more than double the Z2 A GPU's 2,400 million. The die size difference is inverted: the RX 6550S measures 107 mm², while the Z2 A GPU measures 163 mm². This yields a transistor density of 50.5 million per square millimeter for the RX 6550S versus 14.7 million per square millimeter for the Z2 A GPU. The RX 6550S is a denser, more complex GPU in a smaller footprint.

Clock speeds also differ substantially. The RX 6550S has a base clock of 2000 MHz, a game clock of 2170 MHz, and a boost clock of 2400 MHz. The Z2 A GPU has a base clock of 1000 MHz and a boost clock of 1600 MHz, with no game clock specified. The RX 6550S runs at 2.0x the base frequency and 1.5x the boost frequency. The memory clocks differ as well: the RX 6550S uses 2000 MHz memory with 16 Gbps effective transfer, while the Z2 A GPU uses 800 MHz with 6.4 Gbps effective.

Memory architecture is a key differentiator. The RX 6550S uses 4 GB of GDDR6 on a 64-bit bus. The Z2 A GPU uses 16 GB of LPDDR5 on a 128-bit bus. The Z2 A GPU has 4x the capacity and 2x the bus width, but the RX 6550S still achieves higher bandwidth (128.0 GB/s versus 102.4 GB/s) due to the faster GDDR6 signaling. The RX 6550S also has a PCIe 4.0 x4 bus interface, while the Z2 A GPU's bus interface is not specified in the database.

Ray tracing hardware differs in count but not in architecture. The RX 6550S has 16 ray accelerators, the Z2 A GPU has 8. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. Neither has tensor cores. The RX 6550S is an integrated form factor with no power connectors and no slot width specification beyond "IGP". The Z2 A GPU has no slot width, power connector, or bus interface data, but it lists a single USB Type-C display output. The RX 6550S lists "Portable Device Dependent" display outputs.

Power consumption is the most pronounced architectural difference. The RX 6550S has a TDP of 50 W. The Z2 A GPU has a TDP of 15 W. This 3.3x difference in power envelope explains the clock and transistor strategies: the RX 6550S pushes higher frequencies and more compute units within a modest power budget, while the Z2 A GPU sacrifices compute density for a much lower thermal footprint. The release dates also differ: the RX 6550S launched on 2023-01-03, and the Z2 A GPU launched on 2024-12-31. The RX 6550S has a predecessor in the Polaris Mobile generation; the Z2 A GPU has no predecessor listed.

Head-to-Head Benchmarks

The database contains no benchmark scores for either GPU, and the head-to-head benchmark list is empty. Both parts have an average benchmark score of 0 and a percentile rank of 50 against all GPUs. Therefore, the comparison must rely on the specification-derived performance indicators recorded in the database.

The largest single advantage for the RX 6550S is in FP32 compute. At 4.915 TFLOPS, it delivers exactly 3.0x the throughput of the Z2 A GPU's 1.638 TFLOPS. In FP16, the RX 6550S produces 9.830 TFLOPS using a 2:1 ratio, while the Z2 A GPU produces 3.277 TFLOPS, again a 3.0x margin. This means any shader-bound workload that scales with raw ALU throughput will see the RX 6550S pull ahead by a factor of three.

Pixel rate shows the same 3.0x ratio. The RX 6550S achieves 76.80 GPixel/s, the Z2 A GPU achieves 25.60 GPixel/s. Texture rate also shows a 3.0x ratio: 153.6 GTexel/s versus 51.20 GTexel/s. These consistent 3.0x multiples are not coincidental; they reflect the exact doubling of shading units, TMUs, ROPs, and ray accelerators in the RX 6550S, combined with its higher clocks.

The clock advantage compounds the unit advantage. The RX 6550S boosts to 2400 MHz, which is 1.5x the Z2 A GPU's 1600 MHz boost. The base clocks differ by 2.0x: 2000 MHz versus 1000 MHz. When higher unit counts combine with higher frequencies, the theoretical throughput gap widens beyond what either factor alone would predict. The recorded FP32 numbers confirm this: the RX 6550S is not merely 2x faster due to unit count, it is 3x faster due to the combination of 2x units and 1.5x clock speed.

Memory bandwidth is the one area where the RX 6550S does not dominate. Its 128.0 GB/s is 1.25x the Z2 A GPU's 102.4 GB/s. This is a meaningful advantage, but it is far smaller than the compute advantage. The Z2 A GPU's 16 GB capacity, however, is 4x the RX 6550S's 4 GB. For workloads that need large working sets, such as high-resolution textures or complex scene graphs, the Z2 A GPU can hold far more data locally, potentially avoiding memory spills that would hurt the RX 6550S.

Power efficiency is the Z2 A GPU's clearest win. At 15 W, it delivers 1.638 TFLOPS, which is 0.109 TFLOPS per watt. The RX 6550S at 50 W delivers 4.915 TFLOPS, which is 0.098 TFLOPS per watt. The Z2 A GPU is approximately 11% more efficient in raw FP32 per watt. This is a modest but real advantage for the lower-power part. In bandwidth per watt, the Z2 A GPU delivers 6.83 GB/s per watt versus the RX 6550S's 2.56 GB/s per watt, a 2.67x efficiency lead in memory throughput.

FAQ

Q: Which GPU has higher raw compute throughput?

A: The AMD Radeon RX 6550S. It produces 4.915 TFLOPS of FP32 and 9.830 TFLOPS of FP16, while the AMD Ryzen Z2 A GPU produces 1.638 TFLOPS of FP32 and 3.277 TFLOPS of FP16. The RX 6550S is 3.0x faster in both precision formats.

Q: Which GPU has more memory capacity?

A: The AMD Ryzen Z2 A GPU. It has 16 GB of LPDDR5 memory, while the AMD Radeon RX 6550S has 4 GB of GDDR6. The Z2 A GPU offers 4x the memory capacity.

Q: Which GPU has higher memory bandwidth?

A: The AMD Radeon RX 6550S. It achieves 128.0 GB/s over a 64-bit bus, while the AMD Ryzen Z2 A GPU achieves 102.4 GB/s over a 128-bit bus. Despite the narrower bus, the RX 6550S is 1.25x faster due to its higher memory clock and GDDR6 signaling.

Q: What are the power requirements for each GPU?

A: The AMD Radeon RX 6550S has a TDP of 50 W and uses no external power connectors. The AMD Ryzen Z2 A GPU has a TDP of 15 W. The Z2 A GPU draws 3.3x less power.

Q: Do both GPUs support the same graphics APIs?

A: Yes. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. Neither has tensor cores, and both use the RDNA 2.0 architecture.

Q: Which GPU has more ray tracing hardware?

A: The AMD Radeon RX 6550S. It has 16 ray accelerators, while the AMD Ryzen Z2 A GPU has 8. The RX 6550S has 2x the ray tracing units.

Specification Differences

The two GPUs differ in nearly every major specification category. The process node differs: the RX 6550S uses 6 nm, the Z2 A GPU uses 7 nm, both from TSMC. Transistor count differs: 5,400 million versus 2,400 million. Die size differs: 107 mm² versus 163 mm². Transistor density differs: 50.5 million per mm² versus 14.7 million per mm².

Clock speeds differ across the board. The RX 6550S has a 2000 MHz base clock and 2400 MHz boost, while the Z2 A GPU has a 1000 MHz base and 1600 MHz boost. The RX 6550S also has a game clock of 2170 MHz, which the Z2 A GPU lacks. Memory clocks differ: 2000 MHz with 16 Gbps effective for the RX 6550S, 800 MHz with 6.4 Gbps effective for the Z2 A GPU.

Memory configuration differs in size, type, bus width, and bandwidth. The RX 6550S has 4 GB GDDR6 on a 64-bit bus with 128.0 GB/s. The Z2 A GPU has 16 GB LPDDR5 on a 128-bit bus with 102.4 GB/s. Compute unit counts differ: 1024 shading units, 64 TMUs, 32 ROPs, and 16 ray accelerators for the RX 6550S; 512 shading units, 32 TMUs, 16 ROPs, and 8 ray accelerators for the Z2 A GPU.

Rates differ: the RX 6550S has 76.80 GPixel/s pixel rate and 153.6 GTexel/s texture rate, while the Z2 A GPU has 25.60 GPixel/s and 51.20 GTexel/s. FP32 and FP16 throughput differ: 4.915 TFLOPS and 9.830 TFLOPS versus 1.638 TFLOPS and 3.277 TFLOPS. TDP differs: 50 W versus 15 W. The RX 6550S has a PCIe 4.0 x4 bus interface, while the Z2 A GPU has no recorded bus interface. Display outputs differ: "Portable Device Dependent" for the RX 6550S versus "1x USB Type-C" for the Z2 A GPU. The RX 6550S lists a slot width of "IGP" and no power connectors; the Z2 A GPU has no slot width or power connector data.

Generation and release dates differ. The RX 6550S is from the Navi Mobile (RX 6000M) generation and released on 2023-01-03. The Z2 A GPU is from the Console GPU (AMD) generation and released on 2024-12-31. The RX 6550S has a predecessor, Polaris Mobile; the Z2 A GPU has none. Neither part has a recorded successor.

The Verdict

The data indicates these are complementary parts rather than direct competitors. The AMD Radeon RX 6550S is the performance choice. It delivers 3.0x the FP32 compute, 3.0x the pixel rate, 3.0x the texture rate, 2x the ray accelerators, and 1.25x the memory bandwidth of the AMD Ryzen Z2 A GPU. It does so within a 50 W envelope, which is high for an integrated part but low for a discrete GPU. Systems that need maximum shader throughput, high fill rates, or ray tracing capability should use the RX 6550S.

The AMD Ryzen Z2 A GPU is the capacity and efficiency choice. It offers 16 GB of memory, 4x the RX 6550S's 4 GB, and it operates at 15 W, which is 3.3x lower power. Its compute throughput is 1.638 TFLOPS, sufficient for lighter workloads, but its 102.4 GB/s bandwidth and 16 GB capacity make it better suited for memory-heavy tasks. The Z2 A GPU also has a higher FP32-per-watt ratio: 0.109 TFLOPS per watt versus 0.098 TFLOPS per watt for the RX 6550S.

Both parts share the RDNA 2.0 architecture, DirectX 12 Ultimate support, OpenGL 4.6, and Vulkan 1.4. Neither has tensor cores. The RX 6550S uses a more advanced 6 nm process with a much higher transistor density, while the Z2 A GPU uses a larger 7 nm die with lower density. The RX 6550S is the denser, faster, more feature-complete GPU. The Z2 A GPU is the lower-power, higher-capacity part. The choice depends entirely on whether the workload prioritizes compute throughput or memory capacity and power efficiency.