AMD Ryzen Z2 A GPU vs NVIDIA GeForce RTX 4070 Mobile Comparison

The Verdict

The recorded data draws a clear performance boundary between these two mobile graphics processors. The NVIDIA GeForce RTX 4070 Mobile is the dominant part in every measurable benchmark category, while the AMD Ryzen Z2 A GPU occupies a fundamentally different segment defined by its 15 W power envelope.

The NVIDIA part holds the 73rd percentile among all GPUs in the database, with an average benchmark score of 27435. Its nearest rivals include the AMD Radeon RX 6700 XT at 27425, the NVIDIA GeForce RTX 3090 at 27565, the NVIDIA RTX PRO 4000 Blackwell at 27135, and the AMD Radeon Pro Vega 20 at 27839. The RTX 4070 Mobile sits within 1.5% of all four of these desktop-class parts, indicating that its mobile positioning does not sacrifice raw compute capability relative to full-size boards.

The AMD Ryzen Z2 A GPU has no benchmark records in the database and no nearest rivals listed. Its percentile ranking of 50 places it at the median of all recorded GPUs, but with zero average benchmark score, the database contains no direct measurement of its performance. The architecture data, however, reveals why: this is a 15 W part with 512 shading units and 1.638 TFLOPS of FP32 throughput. The RTX 4070 Mobile, by contrast, delivers 4608 shading units and 15.62 TFLOPS of FP32, a 9.5x advantage in raw shader throughput.

For users selecting between these two, the choice depends entirely on the power and thermal budget. The RTX 4070 Mobile is for laptops with substantial cooling and battery capacity, where 115 W of graphics power is acceptable. The Ryzen Z2 A GPU is for handheld or ultra-portable devices where 15 W is the maximum allowable draw. The data does not support any scenario where the AMD part outperforms the NVIDIA part; it does support a scenario where the AMD part enables a device class that the NVIDIA part cannot serve.

Architecture Differences

The two processors come from different foundries, different architectures, and different design philosophies. The AMD Ryzen Z2 A GPU uses the Van Gogh chip built on TSMC's 7 nm process. It contains 2,400 million transistors on a 163 mm² die, yielding a transistor density of 14.7 million per square millimeter. The NVIDIA GeForce RTX 4070 Mobile uses the AD106 chip on TSMC's 5 nm process. It packs 22,900 million transistors into a 188 mm² die, achieving a density of 121.8 million per square millimeter. The NVIDIA die is only 15% larger in area but holds 9.5x more transistors.

Architecturally, the AMD part is built on RDNA 2.0, while the NVIDIA part uses Ada Lovelace. RDNA 2.0 is a console-oriented architecture, and this GPU is categorized under Console GPU (AMD) generation. Ada Lovelace is NVIDIA's dedicated laptop and desktop architecture, here appearing in the GeForce 40 Mobile generation. Both support DirectX 12 Ultimate with feature level 12_2, OpenGL 4.6, and Vulkan 1.4, so API compatibility is identical.

The compute resources differ by an order of magnitude. The Ryzen Z2 A GPU has 512 shading units, 32 texture mapping units, and 16 raster operation units. It includes 8 ray tracing cores but no tensor cores. The RTX 4070 Mobile has 4608 shading units, 144 TMUs, and 48 ROPs. It carries 36 ray tracing cores and 144 tensor cores. These tensor cores are absent from the AMD part entirely, which means any workload that relies on NVIDIA's tensor-core acceleration has no equivalent on the Ryzen Z2 A GPU.

Memory architecture also diverges sharply. The AMD part uses 16 GB of LPDDR5 on a 128-bit bus, delivering 102.4 GB/s of bandwidth. The NVIDIA part uses 8 GB of GDDR6 on the same 128-bit bus width but achieves 256.0 GB/s. The NVIDIA memory runs at 16 Gbps effective, while the AMD memory runs at 6.4 Gbps effective. The AMD part has twice the capacity but less than half the bandwidth, a trade-off that favors capacity for system memory sharing in a unified memory design. The NVIDIA part prioritizes throughput for dedicated graphics workloads.

Clock behavior differs as well. The AMD part has a 1000 MHz base clock and a 1600 MHz boost clock. The NVIDIA part has a 1395 MHz base and 1695 MHz boost. The NVIDIA boost is only 95 MHz higher, but with 9x more shading units, the aggregate throughput is massively higher. Pixel rate on the NVIDIA part is 81.36 GPixel/s versus 25.60 GPixel/s on the AMD part. Texture rate is 244.1 GTexel/s versus 51.20 GTexel/s.

Power consumption is the defining architectural difference. The AMD Ryzen Z2 A GPU has a TDP of 15 W, while the RTX 4070 Mobile has a TDP of 115 W. That is a 7.7x difference in thermal design power. The NVIDIA part requires PCIe 4.0 x8 connectivity and has no power connectors listed, indicating an integrated laptop design with dedicated power delivery. The AMD part connects via a single USB Type-C display output, reinforcing its role as an integrated processor for portable gaming devices.

Where Each One Wins

The RTX 4070 Mobile wins every measurable benchmark category in the database. Its PassMark G3D score is 19587, its PassMark GPU Compute score is 8399, and its Geekbench OpenCL score is 109197 with a Vulkan score of 108367. The Ryzen Z2 A GPU has no recorded benchmark scores, so the database cannot show where it wins. The only meaningful "win" for the AMD part is in power consumption and memory capacity: 15 W versus 115 W, and 16 GB versus 8 GB.

For DirectX legacy workloads, the RTX 4070 Mobile shows strong results. Its PassMark DirectX 9 score is 223, DirectX 10 is 116, DirectX 11 is 179, and DirectX 12 is 85. These are relative scores within the PassMark suite, and they indicate that even older API paths run at high performance on the Ada Lovelace architecture. The DirectX 12 score being lower than DirectX 9 suggests that the newer API path may be less optimized in this specific test, but the absolute numbers remain far above anything the AMD part could produce given its 1.638 TFLOPS ceiling.

The 2D performance score of 763 on the RTX 4070 Mobile is notable for a discrete-class part, especially given that the AMD part's 2D capabilities are not separately measured. The RTX 4070 Mobile also holds a 73rd percentile rank across all GPUs, which places it above the majority of desktop and mobile parts in the database.

The AMD part's wins are structural rather than performance-based. Its 16 GB memory capacity is double the NVIDIA part's 8 GB, which matters for unified memory systems where the GPU and CPU share the same pool. Its 15 W TDP enables fanless or low-noise designs that a 115 W part cannot use. These are not benchmark wins, but they define the product's purpose.

FAQ

Q: Which GPU has higher raw compute throughput?

A: The NVIDIA GeForce RTX 4070 Mobile has 15.62 TFLOPS of FP32 performance, while the AMD Ryzen Z2 A GPU has 1.638 TFLOPS. The NVIDIA part is roughly 9.5x faster in FP32 throughput.

Q: How do their memory bandwidths compare?

A: The RTX 4070 Mobile delivers 256.0 GB/s from 8 GB of GDDR6, while the Ryzen Z2 A GPU delivers 102.4 GB/s from 16 GB of LPDDR5. The NVIDIA part has more than double the bandwidth but half the capacity.

Q: What is the power consumption difference?

A: The AMD Ryzen Z2 A GPU has a 15 W TDP. The NVIDIA GeForce RTX 4070 Mobile has a 115 W TDP. The difference is 100 W, or roughly 7.7x in favor of the AMD part.

Q: Does the AMD part support ray tracing?

A: Yes, the Ryzen Z2 A GPU includes 8 ray tracing cores and supports DirectX 12 Ultimate with feature level 12_2. The RTX 4070 Mobile includes 36 ray tracing cores and the same DirectX feature level.

Q: Where does the RTX 4070 Mobile rank compared to other GPUs?

A: It sits at the 73rd percentile of all GPUs in the database, with an average benchmark score of 27435. It is within 1.5% of the AMD Radeon RX 6700 XT, NVIDIA GeForce RTX 3090, NVIDIA RTX PRO 4000 Blackwell, and AMD Radeon Pro Vega 20.

Q: Does the AMD Ryzen Z2 A GPU have any benchmark scores in the database?

A: No, the database contains no benchmark records for the Ryzen Z2 A GPU. Its average benchmark score is listed as zero, and it has no nearest rivals recorded.

Head-to-Head Benchmarks

The database provides no direct head-to-head benchmark comparisons between these two parts. The only benchmark records belong to the RTX 4070 Mobile, which has nine recorded scores across Geekbench and PassMark suites. The Ryzen Z2 A GPU has zero entries in every benchmark field.

The RTX 4070 Mobile's strongest recorded performance appears in the Geekbench OpenCL test with a score of 109197. Its Vulkan score is close behind at 108367. These two scores represent the part's peak measured performance in compute-oriented workloads. The difference between them is 830 points, approximately 0.8%, indicating that the OpenCL and Vulkan paths perform nearly identically on this hardware.

In PassMark tests, the G3D score of 19587 is the highest among the DirectX and general 3D tests. The GPU Compute score of 8399 is less than half of G3D, which is typical for PassMark's compute test being less parallel-friendly than the 3D graphics test. The DirectX 9 score of 223 exceeds the DirectX 11 score of 179 and the DirectX 10 score of 116, suggesting that older API overhead is lower or that the test workload favors the legacy path. The DirectX 12 score of 85 is the lowest of the four DirectX scores, which may reflect the test's workload characteristics rather than the part's true DirectX 12 capability, given that the architecture supports feature level 12_2.

The 2D score of 763 is modest compared to the 3D scores, but it still represents a functional desktop experience. The RTX 4070 Mobile's average benchmark score of 27435, when compared to its nearest rivals, shows a tight competitive cluster. The AMD Radeon RX 6700 XT scores 27425 with a delta of 0%, meaning the two parts are statistically identical. The NVIDIA GeForce RTX 3090 scores 27565, which is 0.5% higher, placing the RTX 4070 Mobile slightly behind a flagship desktop GPU from the previous generation. The NVIDIA RTX PRO 4000 Blackwell scores 27135, which is 1.1% lower, meaning the RTX 4070 Mobile holds a small edge over that workstation part. The AMD Radeon Pro Vega 20 scores 27839, which is 1.5% higher, making it the strongest of the four rivals by a narrow margin.

These delta values, all within 1.5%, indicate that the RTX 4070 Mobile performs at a level comparable to desktop GPUs from several generations and market tiers. The 73rd percentile ranking confirms that this mobile part outperforms the majority of all GPUs in the database, including many desktop cards.

The Ryzen Z2 A GPU's absence from benchmark records makes direct comparison impossible. Its architectural specifications, however, place it in a different performance class entirely. With 512 shading units and a 1600 MHz boost clock, its peak FP32 throughput is 1.638 TFLOPS. The RTX 4070 Mobile's FP32 throughput of 15.62 TFLOPS is 9.5x higher. The texture rate difference is even larger: 244.1 GTexel/s versus 51.20 GTexel/s, a 4.8x gap. The pixel rate gap is 81.36 GPixel/s versus 25.60 GPixel/s, a 3.2x difference.

The RTX 4070 Mobile also has 144 tensor cores, which the Ryzen Z2 A GPU lacks entirely. This means any deep learning or AI-accelerated workload that uses tensor cores has no equivalent on the AMD part. The RTX 4070 Mobile's 36 ray tracing cores outnumber the AMD part's 8 by 4.5x, and the NVIDIA part's higher clock and memory bandwidth amplify that advantage in actual ray tracing workloads.

In summary, the RTX 4070 Mobile is a high-performance mobile GPU that competes with desktop parts, while the Ryzen Z2 A GPU is a low-power integrated solution with no benchmark presence in the database. The data supports only one conclusion: these parts serve different device classes, and the NVIDIA part is categorically faster in every measurable way.