AMD Ryzen Z2 Go GPU vs NVIDIA GeForce RTX 5070 Mobile Comparison

The Verdict

The database places the NVIDIA GeForce RTX 5070 Mobile in the 75th percentile of all GPUs, while the AMD Ryzen Z2 Go GPU sits at the 50th percentile. This substantial gap is mirrored in their compute capabilities: the RTX 5070 Mobile delivers 13.13 TFLOPS of FP32 throughput, more than three times the 4.147 TFLOPS of the Z2 Go. The data shows a clear hierarchy for raw performance, with the NVIDIA part averaging a benchmark score of 29928, while the AMD part has no recorded benchmark scores.

The RTX 5070 Mobile is the pick for anyone prioritizing computational throughput, ray tracing, or higher-resolution gaming. Its 13.13 TFLOPS FP32 and 36 RT cores dwarf the Z2 Go's 12 RT cores and 4.147 TFLOPS. The NVIDIA chip also leads in memory bandwidth by a wide margin: 384.0 GB/s versus 102.4 GB/s, a 3.75x advantage that matters for texture-heavy workloads and high-detail scenes. The AMD Z2 Go GPU, however, uses only 28 W of power compared to 50 W for the NVIDIA part, and it offers 16 GB of memory versus 8 GB. That combination points to a different use case: a low-power, high-capacity memory solution for portable devices where battery life and memory footprint are more critical than peak frame rates.

FAQ

Q: Which GPU has higher memory bandwidth?

A: The NVIDIA GeForce RTX 5070 Mobile has 384.0 GB/s of bandwidth using GDDR7 memory on a 128-bit bus. The AMD Ryzen Z2 Go GPU has 102.4 GB/s using LPDDR5 on the same 128-bit bus width.

Q: How do their transistor counts compare?

A: The RTX 5070 Mobile packs 21,900 million transistors on a 181 mm² die, while the Z2 Go has 13,100 million transistors on a larger 208 mm² die. This results in a transistor density of 121.0M per mm² for NVIDIA versus 63.0M per mm² for AMD.

Q: What is the power draw difference?

A: The AMD Ryzen Z2 Go GPU has a TDP of 28 W, while the NVIDIA GeForce RTX 5070 Mobile has a TDP of 50 W. The AMD part consumes 22 W less, which is significant for thermally constrained portable designs.

Q: Which GPU has more shading units?

A: The RTX 5070 Mobile has 4608 shading units, 144 texture mapping units, and 48 ROPs. The Z2 Go has 768 shading units, 48 TMUs, and 32 ROPs. NVIDIA's part has six times the shading units.

Q: How does the RTX 5070 Mobile compare to its nearest rivals?

A: Its average benchmark score of 29928 is effectively tied with the GeForce RTX 3070 Ti (29945, delta -0.1%), slightly ahead of the RTX 2080 Ti (29783, delta 0.5%), and behind the AMD Radeon RX 6800 (30095, delta -0.6%) and RX 6700 (30433, delta -1.7%).

Q: What are the production statuses of these chips?

A: Both GPUs are listed as Active in production. The AMD chip was released on 2024-12-31, and the NVIDIA chip on 2025-04-14. The RTX 5070 Mobile's predecessor is the GeForce 40 Mobile series.

Architecture Differences

The two GPUs come from fundamentally different design philosophies. The AMD Ryzen Z2 Go GPU uses the Rembrandt+ chip built on RDNA 2.0 architecture, fabricated on a 6 nm process at TSMC. The NVIDIA GeForce RTX 5070 Mobile uses the GB206 chip with Blackwell 2.0 architecture, on a 5 nm process, also at TSMC. The process node difference is small, but the architectural divergence is large.

RDNA 2.0 is a mature architecture focused on efficiency and console-derived capabilities. The Z2 Go includes 12 ray tracing cores and 768 shading units, with FP16 performance of 8.294 TFLOPS at a 2:1 ratio relative to FP32. This indicates a design that can accelerate half-precision workloads but not at the same rate as full precision.

Blackwell 2.0 is a newer architecture that brings 36 RT cores and 144 tensor cores to the RTX 5070 Mobile. The FP16 throughput of 13.13 TFLOPS matches FP32 exactly at a 1:1 ratio, meaning the NVIDIA part processes half-precision and full-precision at the same speed. This is a notable difference: the AMD GPU halves its throughput when moving from FP16 to FP32, while the NVIDIA GPU does not. The tensor cores in the RTX 5070 Mobile enable AI-accelerated features, a capability absent from the Z2 Go's specification list.

The memory subsystems reflect different priorities. The Z2 Go uses LPDDR5, a power-efficient memory type suited for low-power devices, while the RTX 5070 Mobile uses GDDR7, a high-bandwidth memory designed for performance. The AMD part's 16 GB capacity is double the NVIDIA part's 8 GB, but the bandwidth advantage is reversed: 102.4 GB/s versus 384.0 GB/s.

Specification Differences

The recorded data shows several key specification gaps between the two GPUs. The process node differs: 6 nm for AMD versus 5 nm for NVIDIA. Transistor count is 13,100 million for the Z2 Go and 21,900 million for the RTX 5070 Mobile, with die sizes of 208 mm² and 181 mm² respectively. The transistor density more than doubles: 63.0M per mm² versus 121.0M per mm².

Compute units differ substantially. The AMD GPU has 768 shading units, 48 TMUs, and 32 ROPs. The NVIDIA GPU has 4608 shading units, 144 TMUs, and 48 ROPs. Ray tracing cores are 12 versus 36, and tensor cores are absent on the AMD part versus 144 on the NVIDIA part. Pixel rate favors AMD at 86.40 GPixel/s versus 68.40 GPixel/s, but texture rate favors NVIDIA at 205.2 GTexel/s versus 129.6 GTexel/s.

Clock speeds show an interesting inversion. The Z2 Go has a base clock of 800 MHz and a boost of 2700 MHz, while the RTX 5070 Mobile has a base of 907 MHz and a boost of only 1425 MHz. The AMD part boosts nearly twice as high, yet still delivers far lower throughput due to the massive difference in shading units.

Memory configurations: the Z2 Go uses 16 GB of LPDDR5 at 800 MHz (6.4 Gbps effective) on a 128-bit bus, yielding 102.4 GB/s. The RTX 5070 Mobile uses 8 GB of GDDR7 at 1500 MHz (24 Gbps effective) on a 128-bit bus, yielding 384.0 GB/s. Power draw is 28 W for AMD versus 50 W for NVIDIA. The NVIDIA part uses PCIe 5.0 x16, while the AMD part has no listed bus interface. Display outputs also differ: the Z2 Go has 1x USB Type-C, while the RTX 5070 Mobile is listed as "Portable Device Dependent."

Head-to-Head Benchmarks

The benchmark data available in the database covers only the NVIDIA GeForce RTX 5070 Mobile, with no recorded scores for the AMD Ryzen Z2 Go GPU. The RTX 5070 Mobile's average benchmark score is 29928, with a percentile ranking of 75. Its nearest rival comparison shows it within 1.7% of the AMD Radeon RX 6700 (30433, delta -1.7%) and essentially tied with the GeForce RTX 3070 Ti (29945, delta -0.1%).

Looking at individual tests, the RTX 5070 Mobile shows its strongest results in Geekbench OpenCL with a score of 122238 and Geekbench Vulkan with 116960. PassMark G3D shows a score of 20355, while PassMark GPU Compute records 8279. The DirectX tests are lower: DirectX 9 scores 214, DirectX 11 scores 192, DirectX 10 scores 129, and DirectX 12 scores 93. PassMark G2D, a 2D graphics test, scores 896.

The absence of benchmark data for the Z2 Go means the database cannot provide a direct numerical head-to-head comparison. However, the FP32 throughput figures alone are telling: the RTX 5070 Mobile's 13.13 TFLOPS is 3.17x the Z2 Go's 4.147 TFLOPS. Texture rate follows a similar pattern at 205.2 GTexel/s versus 129.6 GTexel/s, a 1.58x advantage for NVIDIA. The pixel rate is the one metric where AMD leads, at 86.40 GPixel/s versus 68.40 GPixel/s, a 1.26x advantage for the Z2 Go.

Memory bandwidth is where the gap is most pronounced. The RTX 5070 Mobile's 384.0 GB/s is 3.75x the Z2 Go's 102.4 GB/s. This suggests that in bandwidth-sensitive workloads, such as high-resolution textures or compute kernels that stream large datasets, the NVIDIA part will pull further ahead than the raw TFLOPS difference implies.

Where Each One Wins

The AMD Ryzen Z2 Go GPU wins in power efficiency and memory capacity. Its 28 W TDP is 44% lower than the RTX 5070 Mobile's 50 W, making it suitable for fanless or low-profile designs in portable gaming devices. The 16 GB memory capacity is double the NVIDIA part's 8 GB, which can be an advantage for certain workloads that require large working sets, such as AI inference with large models or content creation with big project files. Its higher pixel rate (86.40 GPixel/s versus 68.40 GPixel/s) and higher boost clock (2700 MHz versus 1425 MHz) also indicate that in fill-rate-limited scenarios, the Z2 Go can hold its own.

The NVIDIA GeForce RTX 5070 Mobile wins in nearly every raw performance metric. FP32 throughput is 3.17x higher, texture rate is 1.58x higher, and memory bandwidth is 3.75x higher. The 144 tensor cores enable AI acceleration features that the Z2 Go simply does not have. The 36 RT cores versus 12 provide substantially more ray tracing capability. The 4608 shading units versus 768 give a six-fold advantage in parallel compute. The 75th percentile ranking versus 50th places it in a different performance class entirely.

The use-case split is clear from the data. The Z2 Go is positioned for handheld or low-power devices where 28 W is the thermal budget and 16 GB of memory is a feature. Its RDNA 2.0 architecture with 12 RT cores provides basic ray tracing capability, but the 4.147 TFLOPS FP32 throughput limits its resolution and detail settings. The RTX 5070 Mobile, with 50 W TDP and 13.13 TFLOPS, targets thin-and-light gaming laptops that can accommodate higher power draw. Its GDDR7 memory and 384.0 GB/s bandwidth enable high-refresh-rate gaming at higher resolutions. The 8 GB capacity is a constraint, but the bandwidth and compute advantages far outweigh that limitation in most gaming scenarios.

The data suggests that the RTX 5070 Mobile is the performance pick, while the Z2 Go is the efficiency pick. Neither part is a clear winner across all criteria; the choice depends on whether the priority is raw throughput or power-conscious operation with larger memory capacity.