AMD Ryzen Z2 GPU vs NVIDIA GeForce RTX 4070 Mobile Comparison

FAQ

Q: What are the key performance differences between the AMD Ryzen Z2 GPU and the NVIDIA GeForce RTX 4070 Mobile?

A: The RTX 4070 Mobile delivers significantly higher raw compute performance, with 15.62 TFLOPS FP32 versus 8.294 TFLOPS for the Ryzen Z2 GPU. This nearly 2x gap in shading throughput is reflected in the RTX 4070 Mobile's average benchmark score of 27435, compared to the Ryzen Z2 GPU's average score of 0 in the database.

Q: How do the two GPUs compare in memory bandwidth?

A: The RTX 4070 Mobile has more than double the memory bandwidth at 256.0 GB/s, using 8 GB of GDDR6 memory on a 128-bit bus. The Ryzen Z2 GPU provides 119.9 GB/s from 16 GB of LPDDR5X memory on the same 128-bit bus width. The RTX 4070 Mobile's faster memory architecture gives it a substantial advantage in bandwidth-bound workloads.

Q: What are the power consumption differences between the two GPUs?

A: The Ryzen Z2 GPU has a TDP of 28 W, while the RTX 4070 Mobile has a TDP of 115 W. The RTX 4070 Mobile consumes approximately four times the power of the Ryzen Z2 GPU, which correlates with its higher performance ceiling but also indicates different target platforms.

Q: What is the transistor count and die size comparison?

A: The Ryzen Z2 GPU, based on the Hawk Point chip, contains 25,390 million transistors on a 178 mm² die using a 4 nm process. The RTX 4070 Mobile's AD106 chip contains 22,900 million transistors on a 188 mm² die using a 5 nm process. Despite the smaller die, the Ryzen Z2 GPU achieves a higher transistor density of 142.6M per mm² versus 121.8M per mm² for the RTX 4070 Mobile.

Q: How do the rendering pipelines compare?

A: The RTX 4070 Mobile has 4608 shading units, 144 TMUs, 48 ROPs, 36 RT cores, and 144 tensor cores. The Ryzen Z2 GPU has 768 shading units, 48 TMUs, 32 ROPs, and 12 RT cores. The RTX 4070 Mobile also includes tensor cores, which the Ryzen Z2 GPU lacks entirely.

Q: What is the percentile ranking of each GPU in the database?

A: The RTX 4070 Mobile sits at the 73rd percentile among all GPUs, while the Ryzen Z2 GPU sits at the 50th percentile. The RTX 4070 Mobile's nearest rivals include the NVIDIA GeForce RTX 3090 with a 0.5% higher score, the AMD Radeon Pro Vega 20 at 1.5% higher, the AMD Radeon RX 6700 XT at parity, and the NVIDIA RTX PRO 4000 Blackwell at 1.1% lower.

The Verdict

The recorded data indicates a clear performance hierarchy. The RTX 4070 Mobile is the stronger GPU for compute-heavy tasks, with more than 4x the shading units, 3x the RT cores, and nearly 2x the FP32 throughput. Its average benchmark score of 27435 places it at the 73rd percentile, a full 23 percentile points above the Ryzen Z2 GPU's 50th percentile placement.

The Ryzen Z2 GPU, however, operates at a 28 W TDP, which is roughly one quarter of the RTX 4070 Mobile's 115 W TDP. This makes it suitable for platforms where power delivery and thermal dissipation are constrained. The Ryzen Z2 GPU also provides 16 GB of memory, double the RTX 4070 Mobile's 8 GB, which may benefit memory-capacity-sensitive workloads despite the lower bandwidth.

Users prioritizing raw frame rates, ray tracing, or compute performance should select the RTX 4070 Mobile. Users prioritizing power efficiency and memory capacity should select the Ryzen Z2 GPU. The data does not support a single universal recommendation; the choice depends entirely on the workload and platform constraints.

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark comparisons between the two GPUs. However, the RTX 4070 Mobile has recorded benchmark scores across multiple test suites, while the Ryzen Z2 GPU has no benchmark entries in the database.

In Geekbench OpenCL, the RTX 4070 Mobile scores 109197. In Geekbench Vulkan, it scores 108367. These results indicate strong general-purpose compute and graphics API performance. The PassMark suite shows a G3D score of 19587, a GPU compute score of 8399, and DirectX-specific results of 116 for DirectX 10, 179 for DirectX 11, 85 for DirectX 12, and 223 for DirectX 9. The 2D graphics score is 763.

The RTX 4070 Mobile's average benchmark score of 27435 places it within 0.5% of the NVIDIA GeForce RTX 3090's average score of 27565, and 1.5% below the AMD Radeon Pro Vega 20's score of 27839. It sits at parity with the AMD Radeon RX 6700 XT, which scores 27425, and 1.1% above the NVIDIA RTX PRO 4000 Blackwell at 27135.

Without recorded benchmark scores for the Ryzen Z2 GPU, the database cannot quantify its performance in these specific tests. The specification data, however, shows a substantial theoretical advantage for the RTX 4070 Mobile in texture rate, 244.1 GTexel/s versus 129.6 GTexel/s, and in FP32 compute, 15.62 TFLOPS versus 8.294 TFLOPS.

The pixel rate comparison is closer. The Ryzen Z2 GPU achieves 86.40 GPixel/s, slightly ahead of the RTX 4070 Mobile's 81.36 GPixel/s. This reflects the Ryzen Z2 GPU's higher boost clock of 2700 MHz versus 1695 MHz for the RTX 4070 Mobile, which partially compensates for its fewer ROPs.

Specification Differences

The two GPUs differ across nearly every major specification category. The RTX 4070 Mobile belongs to the GeForce 40-series and uses the AD106 chip with Ada Lovelace architecture. The Ryzen Z2 GPU uses the Hawk Point chip with RDNA 3.0 architecture and is categorized as a Console GPU.

The process nodes differ: the Ryzen Z2 GPU uses a 4 nm TSMC process, while the RTX 4070 Mobile uses a 5 nm TSMC process. Both are produced by TSMC, but the Ryzen Z2 GPU's smaller node contributes to its higher transistor density of 142.6M per mm², despite having more total transistors at 25,390 million versus 22,900 million.

Memory configurations are markedly different. The Ryzen Z2 GPU offers 16 GB of LPDDR5X at 119.9 GB/s, while the RTX 4070 Mobile offers 8 GB of GDDR6 at 256.0 GB/s. Both use a 128-bit bus, but the RTX 4070 Mobile's GDDR6 memory operates at 16 Gbps effective versus 7.5 Gbps effective for the LPDDR5X.

The clock speeds show an interesting inversion. The Ryzen Z2 GPU has a base clock of 800 MHz and a boost clock of 2700 MHz. The RTX 4070 Mobile has a base clock of 1395 MHz and a boost clock of 1695 MHz. The Ryzen Z2 GPU's higher boost clock does not compensate for its significantly lower core count.

The power envelope differs substantially. The Ryzen Z2 GPU has a TDP of 28 W, while the RTX 4070 Mobile has a TDP of 115 W. Neither GPU requires external power connectors. The RTX 4070 Mobile uses a PCIe 4.0 x8 bus interface, while the Ryzen Z2 GPU has no listed bus interface. Display outputs also differ, with the Ryzen Z2 GPU providing one USB Type-C port and the RTX 4070 Mobile being portable device dependent.

The release dates differ by approximately one year. The RTX 4070 Mobile was released in January 2023, while the Ryzen Z2 GPU was released in December 2024. The RTX 4070 Mobile lists the GeForce 30 Mobile as its predecessor and the GeForce 50 Mobile as its successor.

Architecture Differences

The architectural divide between these two GPUs is fundamental. The Ryzen Z2 GPU uses AMD's RDNA 3.0 architecture on the Hawk Point chip, while the RTX 4070 Mobile uses NVIDIA's Ada Lovelace architecture on the AD106 chip. These are different design philosophies targeting different use cases.

The compute unit organization reflects this. The RTX 4070 Mobile has 4608 shading units, 144 TMUs, and 48 ROPs. The Ryzen Z2 GPU has 768 shading units, 48 TMUs, and 32 ROPs. The RTX 4070 Mobile's shading unit count is exactly 6x that of the Ryzen Z2 GPU, giving it a substantial advantage in parallel compute workloads.

Ray tracing hardware also differs significantly. The RTX 4070 Mobile includes 36 RT cores, while the Ryzen Z2 GPU includes 12 RT cores. This 3x difference suggests the RTX 4070 Mobile will handle ray-traced workloads with considerably more headroom.

The tensor core situation is a binary difference. The RTX 4070 Mobile includes 144 tensor cores, while the Ryzen Z2 GPU has no tensor cores listed. This means the RTX 4070 Mobile can accelerate AI and machine learning workloads, while the Ryzen Z2 GPU cannot offload these tasks to dedicated hardware.

Both GPUs support the same API feature set: DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. This means software compatibility at the API level is equivalent, though the underlying hardware capabilities differ substantially.

The FP16 to FP32 ratio is 1:1 for both GPUs, indicating neither has a dedicated half-precision acceleration path. The FP32 output of 15.62 TFLOPS for the RTX 4070 Mobile versus 8.294 TFLOPS for the Ryzen Z2 GPU confirms the RTX 4070 Mobile's advantage in general compute throughput.

The manufacturing approach differs in density and efficiency. The Ryzen Z2 GPU's 4 nm process with 25,390 million transistors on a 178 mm² die achieves 142.6M transistors per mm². The RTX 4070 Mobile's 5 nm process with 22,900 million transistors on a 188 mm² die achieves 121.8M transistors per mm². The Ryzen Z2 GPU packs more transistors into a smaller area, but the RTX 4070 Mobile uses its larger area for more compute resources.