AMD Radeon 820M vs AMD Ryzen Z2 A GPU Comparison

The Verdict

The database comparison between the AMD Radeon 820M and the AMD Ryzen Z2 A GPU shows two fundamentally different integrated graphics solutions. The Radeon 820M, built on the RDNA 3.5 architecture with a 4 nm process node, delivers higher clock speeds and newer architectural features. The Ryzen Z2 A GPU, built on the older RDNA 2.0 architecture with a 7 nm process node, provides substantially more shading units, texture mapping units, and raster operations pipelines.

The Radeon 820M boosts to 2800 MHz, which is 75% higher than the Ryzen Z2 A GPU's 1600 MHz boost clock. However, the Ryzen Z2 A GPU carries 512 shading units against the Radeon 820M's 128 shading units, a 4:1 ratio. That same 4:1 ratio applies to texture mapping units (32 versus 8) and raster operations pipelines (16 versus 4). The Ryzen Z2 A GPU also has 8 ray tracing cores versus 2 on the Radeon 820M.

For compute workloads, the Ryzen Z2 A GPU delivers 1.638 TFLOPS of FP32 performance, more than double the Radeon 820M's 716.8 GFLOPS. The pixel rate tells a similar story: 25.60 GPixel/s versus 11.20 GPixel/s, a 2.29x advantage for the Ryzen Z2 A GPU. The texture rate of 51.20 GTexel/s versus 22.40 GTexel/s represents a 2.29x lead as well.

The Radeon 820M is the choice for users prioritizing architectural recency, higher clocks, and the efficiency of a 4 nm manufacturing process. The Ryzen Z2 A GPU is the choice for users prioritizing raw throughput, dedicated memory bandwidth, and larger compute resources. The data indicates the Ryzen Z2 A GPU wins decisively on raw performance metrics, while the Radeon 820M wins on clock speed and process technology.

FAQ

Q: Which GPU has more shading units?

A: The AMD Ryzen Z2 A GPU has 512 shading units, four times the 128 shading units found on the AMD Radeon 820M.

Q: How do the boost clocks compare?

A: The Radeon 820M boosts to 2800 MHz, while the Ryzen Z2 A GPU boosts to 1600 MHz. The Radeon 820M's boost clock is 75% higher.

Q: What is the FP32 performance difference?

A: The Ryzen Z2 A GPU delivers 1.638 TFLOPS, while the Radeon 820M delivers 716.8 GFLOPS. The Ryzen Z2 A GPU is approximately 2.29x faster in FP32 compute.

Q: Do both GPUs support the same DirectX version?

A: Yes, both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: Which GPU has more ray tracing cores?

A: The Ryzen Z2 A GPU has 8 ray tracing cores, compared to 2 on the Radeon 820M.

Q: How does memory configuration differ?

A: The Ryzen Z2 A GPU has 16 GB of LPDDR5 memory on a 128-bit bus with 102.4 GB/s bandwidth. The Radeon 820M uses system shared memory with system dependent bandwidth.

Architecture Differences

The AMD Radeon 820M uses the RDNA 3.5 architecture and belongs to the Navi III IGP generation, specifically the Strix Point Mobile lineup. Its chip, Krackan Point 2, is manufactured on a 4 nm process at TSMC. The architecture generation is a newer iteration of AMD's graphics core design.

The AMD Ryzen Z2 A GPU uses the RDNA 2.0 architecture and belongs to the Console GPU generation. Its chip, Van Gogh, is manufactured on a 7 nm process at TSMC. The database lists 2,400 million transistors on a 163 mm² die, giving a transistor density of 14.7 million transistors per square millimeter. The Radeon 820M lists unknown transistor count and die size.

The Radeon 820M features 128 shading units, 8 texture mapping units, 4 raster operations pipelines, and 2 ray tracing cores. The Ryzen Z2 A GPU features 512 shading units, 32 texture mapping units, 16 raster operations pipelines, and 8 ray tracing cores. Both GPUs lack tensor cores, as the tensorCores field is null for both.

Both GPUs support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The Radeon 820M uses a PCIe 4.0 x8 bus interface, while the Ryzen Z2 A GPU has no bus interface listed in the database.

The Radeon 820M is classified as an IGP with a slot width of "IGP" and no power connectors. The Ryzen Z2 A GPU lists a single USB Type-C display output, while the Radeon 820M lists display outputs as portable device dependent.

Specification Differences

Clock speeds differ significantly. The Radeon 820M has a 400 MHz base clock and 2800 MHz boost clock. The Ryzen Z2 A GPU has a 1000 MHz base clock and 1600 MHz boost clock. The Radeon 820M's boost clock is 1200 MHz higher.

Memory configurations differ. The Radeon 820M uses system shared memory in both size and type, with system dependent bandwidth. The Ryzen Z2 A GPU has a dedicated 16 GB LPDDR5 memory pool on a 128-bit bus, providing 102.4 GB/s of bandwidth. The Ryzen Z2 A GPU also lists a memory clock of 800 MHz with 6.4 Gbps effective speed.

Compute resources differ by a factor of four. The Radeon 820M has 128 shading units, 8 TMUs, and 4 ROPs. The Ryzen Z2 A GPU has 512 shading units, 32 TMUs, and 16 ROPs. Ray tracing cores are 2 versus 8.

Performance rates differ. The Radeon 820M achieves 11.20 GPixel/s pixel rate, 22.40 GTexel/s texture rate, and 716.8 GFLOPS FP32. The Ryzen Z2 A GPU achieves 25.60 GPixel/s, 51.20 GTexel/s, and 1.638 TFLOPS FP32. The Ryzen Z2 A GPU also lists 3.277 TFLOPS FP16 with a 2:1 ratio, while the Radeon 820M lists 716.8 GFLOPS FP16 at a 1:1 ratio.

Power consumption is listed as 15 W for both GPUs. The process nodes differ: 4 nm for the Radeon 820M, 7 nm for the Ryzen Z2 A GPU. Both are produced by TSMC. The Radeon 820M uses the PCIe 4.0 x8 interface, while the Ryzen Z2 A GPU has no bus interface recorded.

The Radeon 820M was released on 2025-02-28, while the Ryzen Z2 A GPU has a release date of 2024-12-31. The Radeon 820M lists its predecessor as Navi II IGP, while the Ryzen Z2 A GPU has no predecessor recorded. Both GPUs have active production status.

Head-to-Head Benchmarks

The recorded data contains no direct head-to-head benchmark scores for these two GPUs. The winsA and winsB fields are both zero, and the headToHeadBenchmarks array is empty. However, the specification data provides measurable comparisons that indicate relative performance.

The Ryzen Z2 A GPU leads in every throughput metric. Its FP32 performance of 1.638 TFLOPS is 2.29x the Radeon 820M's 716.8 GFLOPS. Its pixel rate of 25.60 GPixel/s is 2.29x the Radeon 820M's 11.20 GPixel/s. Its texture rate of 51.20 GTexel/s is 2.29x the Radeon 820M's 22.40 GTexel/s. These consistent 2.29x ratios reflect the 4x difference in shading units, TMUs, and ROPs, partially offset by the Radeon 820M's higher clocks.

The Radeon 820M leads in clock speed. Its 2800 MHz boost is 75% higher than the Ryzen Z2 A GPU's 1600 MHz boost. Its 400 MHz base clock is lower than the Ryzen Z2 A GPU's 1000 MHz base clock, which indicates the Ryzen Z2 A GPU maintains a higher floor frequency. The Radeon 820M's boost advantage does not overcome the Ryzen Z2 A GPU's resource advantage in raw throughput calculations.

Memory bandwidth heavily favors the Ryzen Z2 A GPU. The 102.4 GB/s bandwidth from its 128-bit LPDDR5 interface contrasts with the Radeon 820M's system dependent bandwidth. The Ryzen Z2 A GPU's 16 GB dedicated memory pool provides consistent capacity, while the Radeon 820M relies on shared system memory.

Ray tracing capability favors the Ryzen Z2 A GPU with 8 ray tracing cores versus 2. The Radeon 820M's RDNA 3.5 architecture is newer, but the database shows fewer ray tracing cores.

Where Each One Wins

The Ryzen Z2 A GPU wins in compute-heavy workloads. Its 1.638 TFLOPS FP32 performance and 3.277 TFLOPS FP16 performance (2:1 ratio) give it a clear advantage in tasks that scale with shading unit count. The 4x shading unit advantage directly translates to higher fill rates: 25.60 GPixel/s versus 11.20 GPixel/s.

The Ryzen Z2 A GPU wins in memory-intensive scenarios. Its 102.4 GB/s of dedicated LPDDR5 bandwidth on a 128-bit bus provides predictable performance. The 16 GB memory capacity supports larger working sets. The Radeon 820M's system dependent bandwidth means its memory performance varies with the host system configuration.

The Ryzen Z2 A GPU wins in ray tracing workloads. With 8 ray tracing cores versus 2, the Ryzen Z2 A GPU has 4x the ray tracing hardware.

The Radeon 820M wins on architectural efficiency. The 4 nm process node from TSMC represents a newer manufacturing technology compared to the 7 nm node used for the Ryzen Z2 A GPU. The RDNA 3.5 architecture is a newer generation than RDNA 2.0.

The Radeon 820M wins on clock speed. Its 2800 MHz boost clock exceeds the Ryzen Z2 A GPU's 1600 MHz by 75%. This higher clock can benefit workloads that are latency-sensitive rather than throughput-bound.

The Radeon 820M wins on interface flexibility. Its PCIe 4.0 x8 bus interface provides a standardized connection, while the Ryzen Z2 A GPU has no bus interface recorded. The Radeon 820M's display outputs are portable device dependent, while the Ryzen Z2 A GPU lists a single USB Type-C output.

Both GPUs share equal 15 W TDP ratings. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. Both have active production status.

The data shows a clear division: the Ryzen Z2 A GPU is the stronger performer across raw compute and memory metrics, while the Radeon 820M offers newer architecture, higher clocks, and a more advanced process node. Users needing maximum throughput from the recorded specifications should favor the Ryzen Z2 A GPU. Users prioritizing the latest architectural features and process efficiency should favor the Radeon 820M.