AMD Radeon RX 7900M vs AMD Ryzen Z2 A GPU Comparison

The Verdict

The data positions the AMD Radeon RX 7900M as a high-end mobile graphics solution, while the AMD Ryzen Z2 A GPU is a low-power integrated-class part. The RX 7900M sits in the 94th percentile of all GPUs, with an average benchmark score of 97,487. The Ryzen Z2 A GPU carries a 50th percentile ranking and an average benchmark score of 0, as the database contains no recorded benchmarks for it. The RX 7900M is the only part with measurable performance data, and it outperforms the Ryzen Z2 A GPU by a wide margin across every architectural and compute metric available.

The RX 7900M is designed for demanding portable workloads, delivering 38.52 TFLOPS of FP32 compute, a 576.0 GB/s memory bandwidth, and 16 GB of GDDR6 memory on a 256-bit bus. The Ryzen Z2 A GPU delivers 1.638 TFLOPS of FP32 compute, 102.4 GB/s of memory bandwidth, and 16 GB of LPDDR5 memory on a 128-bit bus. The RX 7900M is roughly 23.5 times higher in FP32 compute and 5.6 times higher in memory bandwidth. The Ryzen Z2 A GPU operates at 15 W TDP, while the RX 7900M is rated at 180 W TDP, which explains the substantial performance separation.

The database indicates the RX 7900M is the choice for users who need maximum graphics throughput in a laptop-class device. The Ryzen Z2 A GPU is the choice for extremely low-power applications, but it offers no benchmark evidence of competitive performance. There is no scenario in the recorded data where the Ryzen Z2 A GPU wins a measured performance comparison.

Architecture Differences

The RX 7900M uses the Navi 31 chip built on RDNA 3.0 architecture, with the codename Plum Bonito. It belongs to the Navi Mobile (RX 7000M) generation. The Ryzen Z2 A GPU uses the Van Gogh chip built on RDNA 2.0 architecture and is classified under Console GPU (AMD).

The process nodes differ significantly. The RX 7900M is manufactured on a 5 nm process at TSMC, while the Ryzen Z2 A GPU is manufactured on a 7 nm process at TSMC. The RX 7900M integrates 57,700 million transistors on a 529 mm² die, giving a transistor density of 109.1M per mm². The Ryzen Z2 A GPU integrates 2,400 million transistors on a 163 mm² die, giving a transistor density of 14.7M per mm². The RX 7900M has roughly 24 times the transistor count and a die area 3.2 times larger.

The compute units differ in scale. The RX 7900M has 4,608 shading units, 288 texture mapping units, 192 raster operation units, and 72 ray tracing cores. The Ryzen Z2 A GPU has 512 shading units, 32 texture mapping units, 16 raster operation units, and 8 ray tracing cores. The RX 7900M has 9 times the shading units, 9 times the TMUs, 12 times the ROPs, and 9 times the ray tracing cores.

The clock speeds also separate the two. The RX 7900M has a base clock of 1825 MHz and a boost clock of 2090 MHz, with memory running at 2250 MHz (18 Gbps effective). The Ryzen Z2 A GPU has a base clock of 1000 MHz and a boost clock of 1600 MHz, with memory at 800 MHz (6.4 Gbps effective).

Both parts support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. Neither has tensor cores listed. The RX 7900M is an IGP with no power connectors and a PCIe 4.0 x16 bus interface, with display outputs listed as Portable Device Dependent. The Ryzen Z2 A GPU lists a single USB Type-C display output and no bus interface data.

FAQ

Q: Which GPU has the higher FP32 compute throughput?

A: The AMD Radeon RX 7900M delivers 38.52 TFLOPS of FP32 compute, while the AMD Ryzen Z2 A GPU delivers 1.638 TFLOPS. The RX 7900M is approximately 23.5 times higher in this metric.

Q: What memory configurations do these two GPUs use?

A: Both have 16 GB of memory, but the types differ. The RX 7900M uses GDDR6 on a 256-bit bus with 576.0 GB/s bandwidth. The Ryzen Z2 A GPU uses LPDDR5 on a 128-bit bus with 102.4 GB/s bandwidth.

Q: How do their power requirements compare?

A: The RX 7900M is rated at 180 W TDP, while the Ryzen Z2 A GPU is rated at 15 W TDP. The RX 7900M requires 12 times the power envelope of the Ryzen Z2 A GPU.

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 lists tensor cores in the database.

Q: Which GPU has the higher transistor density?

A: The RX 7900M has a transistor density of 109.1M per mm², compared to 14.7M per mm² for the Ryzen Z2 A GPU. The RX 7900M is roughly 7.4 times denser.

Q: What is the ray tracing core count for each GPU?

A: The RX 7900M has 72 ray tracing cores, while the Ryzen Z2 A GPU has 8 ray tracing cores. The RX 7900M has 9 times the ray tracing core count.

Specification Differences

The two GPUs differ in almost every recorded specification field. The RX 7900M uses the Navi 31 chip with RDNA 3.0 architecture and the Plum Bonito codename, while the Ryzen Z2 A GPU uses the Van Gogh chip with RDNA 2.0 architecture and no codename listed.

The process node differs: 5 nm for the RX 7900M versus 7 nm for the Ryzen Z2 A GPU. Transistor counts are 57,700 million versus 2,400 million. Die size is 529 mm² versus 163 mm². Transistor density is 109.1M per mm² versus 14.7M per mm².

Clock speeds differ across the board. The RX 7900M runs at 1825 MHz base and 2090 MHz boost, with memory at 2250 MHz (18 Gbps effective). The Ryzen Z2 A GPU runs at 1000 MHz base and 1600 MHz boost, with memory at 800 MHz (6.4 Gbps effective).

Memory specifications differ in type, bus width, and bandwidth. The RX 7900M uses 16 GB GDDR6 on a 256-bit bus with 576.0 GB/s bandwidth. The Ryzen Z2 A GPU uses 16 GB LPDDR5 on a 128-bit bus with 102.4 GB/s bandwidth.

Compute unit counts differ: 4,608 shading units versus 512, 288 TMUs versus 32, 192 ROPs versus 16, and 72 ray tracing cores versus 8. Pixel rate is 401.3 GPixel/s versus 25.60 GPixel/s. Texture rate is 601.9 GTexel/s versus 51.20 GTexel/s. FP32 is 38.52 TFLOPS versus 1.638 TFLOPS. FP16 is 77.05 TFLOPS (2:1) versus 3.277 TFLOPS (2:1).

TDP is 180 W versus 15 W. The RX 7900M is listed as an IGP with no power connectors and a PCIe 4.0 x16 bus interface. The Ryzen Z2 A GPU has no slot width, power connector, or bus interface data. Display outputs are Portable Device Dependent for the RX 7900M and 1x USB Type-C for the Ryzen Z2 A GPU.

Release dates differ: the RX 7900M released on 2023-10-18, while the Ryzen Z2 A GPU released on 2024-12-31. The RX 7900M lists Polaris Mobile as its predecessor, while the Ryzen Z2 A GPU has no predecessor listed. The RX 7900M has a 94th percentile ranking versus 50th for the Ryzen Z2 A GPU.

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark entries between the RX 7900M and the Ryzen Z2 A GPU. The win counters show zero for both sides. However, the RX 7900M has three recorded benchmark scores, while the Ryzen Z2 A GPU has none.

The RX 7900M scores 4,201 in 3DMark Steel Nomad (DX12), 129,499 in Geekbench OpenCL, and 158,760 in Geekbench Vulkan. Its average benchmark score is 97,487. The Ryzen Z2 A GPU has an average benchmark score of 0, indicating no measured results in the database.

The RX 7900M ranks in the 94th percentile of all GPUs. Its nearest rivals in the database include the AMD Radeon Pro VII with an average score of 97,131 and a delta of 0.4%, the NVIDIA Quadro RTX 6000 with an average score of 101,872 and a delta of -4.3%, the AMD Radeon Instinct MI60 with an average score of 92,466 and a delta of 5.4%, and the NVIDIA RTX A4500 with an average score of 91,671 and a delta of 6.3%. This places the RX 7900M slightly above the Radeon Pro VII and Instinct MI60, slightly below the Quadro RTX 6000, and clearly ahead of the RTX A4500.

The Ryzen Z2 A GPU has no nearest rivals listed and no benchmarks, so no comparative interpretation is possible from the recorded data. The specification comparison shows the RX 7900M leads in every compute metric, but benchmark verification for the Ryzen Z2 A GPU is absent.

Where Each One Wins

The RX 7900M wins in all measured and derived performance categories. Its FP32 throughput of 38.52 TFLOPS versus 1.638 TFLOPS makes it the clear choice for compute-heavy workloads. Its memory bandwidth of 576.0 GB/s versus 102.4 GB/s gives it a decisive advantage in memory-bound tasks. Its pixel rate of 401.3 GPixel/s versus 25.60 GPixel/s and texture rate of 601.9 GTexel/s versus 51.20 GTexel/s indicate strong rasterization throughput.

The RX 7900M also wins on ray tracing capability with 72 ray tracing cores versus 8, and on shading resources with 4,608 shading units versus 512. The 192 ROPs versus 16 further reinforces its advantage in fill-rate-limited scenarios.

The Ryzen Z2 A GPU wins only in power efficiency. Its 15 W TDP versus 180 W TDP means it consumes 12 times less power. This makes it suitable for low-power or thermally constrained designs, but the database provides no benchmark results to demonstrate its performance level. Its 16 GB of LPDDR5 memory is the only parity point with the RX 7900M in terms of capacity, though bandwidth is far lower.

The recorded data shows no scenario where the Ryzen Z2 A GPU outperforms the RX 7900M. The RX 7900M is the performance leader across compute, memory, and rendering metrics, while the Ryzen Z2 A GPU is confined to low-power use cases without measurable benchmark evidence.