NVIDIA GeForce RTX 4070 vs NVIDIA GeForce RTX 5080 Mobile Comparison

The benchmark data presents a fascinating contrast: the NVIDIA GeForce RTX 5080 Mobile, a laptop-class GPU, decisively wins the flagship 3DMark test, while the desktop NVIDIA GeForce RTX 4070 counters with a significant victory in compute workloads. The RTX 5080 Mobile takes 6 of 10 benchmarks, but the RTX 4070’s wins in Vulkan and compute reveal that raw architecture and power limits, rather than generational nameplates, dictate the final verdict. This comparison shows that the RTX 5080 Mobile is not a universal upgrade over its desktop predecessor; it is a specialist that excels in modern DirectX 12 scenarios while ceding ground in other areas.

Head-to-Head Benchmarks

The most striking result is in the 3DMark Steel Nomad DX12 test, where the RTX 5080 Mobile scores 4952 against the RTX 4070’s 3854. This represents a commanding 28.5% lead for the mobile part, making it the single largest margin of victory in the entire comparison. This result indicates that the Blackwell architecture's strengths are heavily weighted toward the latest DirectX 12 Ultimate workloads, which is a critical point for gamers looking at future titles.

The RTX 5080 Mobile also wins the Geekbench OpenCL test with a score of 166986, which is 7.8% ahead of the RTX 4070’s 154858. This shows a clear advantage in general-purpose compute tasks that leverage this API. In the Passmark suite, the mobile chip secures wins in three DirectX tests: DirectX 10 (171 vs 139, +23%), DirectX 12 (116 vs 103, +12.6%), and DirectX 11 (253 vs 244, +3.7%). The DirectX 10 margin is particularly noteworthy, showing a strong lead in legacy API performance as well. The RTX 5080 Mobile also edges out the RTX 4070 in Passmark G3D, scoring 27711 versus 26927, a modest but clear 2.9% advantage in overall 3D graphics performance.

However, the RTX 4070 is far from a clean sweep for the desktop part. Its most significant victory is in the Passmark GPU Compute test, where it scores 14720 against the RTX 5080 Mobile’s 12134. This is a substantial 17.6% lead, indicating that the desktop GPU has a significant edge in compute-heavy applications like rendering or scientific calculations. The RTX 4070 also wins the Geekbench Vulkan test, scoring 174152 versus 169754, a 2.5% advantage that suggests better optimization for Vulkan-based games and applications. The desktop card also takes the Passmark G2D test (1164 vs 1095, +5.9%) and the Passmark DirectX 9 test (320 vs 314, +1.9%), showing strength in 2D workloads and older DX9 titles.

Architecture Differences

The two GPUs are built on fundamentally different architectures, and these differences explain the benchmark results. The RTX 5080 Mobile uses the GB203 chip based on the Blackwell 2.0 architecture, while the RTX 4070 uses the AD104 chip based on the older Ada Lovelace architecture. Both are manufactured on a 5 nm process at TSMC, but the similarities end there.

The RTX 5080 Mobile’s GB203 chip is significantly larger, with a die size of 378 mm² and 45,600 million transistors. This compares to the RTX 4070’s 294 mm² die with 35,800 million transistors. Interestingly, the transistor density is nearly identical, at 120.6M / mm² for the mobile chip and 121.8M / mm² for the desktop chip, indicating that the size increase is due to more functional units rather than a denser design. The mobile GPU also features a newer PCIe 5.0 x16 interface, while the desktop part is limited to PCIe 4.0 x16.

The memory subsystems are also starkly different. The RTX 5080 Mobile pairs its 16 GB of GDDR7 memory on a 256-bit bus, yielding a massive 896.0 GB/s of bandwidth. In contrast, the RTX 4070 uses 12 GB of GDDR6X on a 192-bit bus, providing 504.2 GB/s. The mobile chip’s bandwidth advantage is a direct result of both the newer memory type and the wider bus. The core configurations also favor the mobile part: the RTX 5080 Mobile has 7680 shading units, 240 TMUs, and 96 ROPs, while the RTX 4070 has 5888 shading units, 184 TMUs, and 64 ROPs. The RTX 5080 Mobile also has more RT cores (60 vs 46) and tensor cores (240 vs 184).

Where Each One Wins

The RTX 5080 Mobile is the clear winner for modern, DirectX 12-centric gaming. Its 28.5% lead in 3DMark Steel Nomad is the headline statistic, and its wins in DirectX 11 and 12 Passmark tests reinforce that this is the GPU for current and future AAA titles. The mobile part’s massive memory bandwidth (896.0 GB/s) and larger 16 GB frame buffer make it well-suited for high-resolution textures and data-heavy scenes. If a user prioritizes native DirectX 12 performance, the data overwhelmingly points to the RTX 5080 Mobile.

The RTX 4070, on the other hand, is the winner for compute-intensive applications. Its 17.6% lead in the Passmark GPU Compute test is a clear signal that it is the better choice for workloads like video encoding, 3D rendering, or any task that relies heavily on parallel processing power. The desktop card’s advantage in Vulkan (2.5% in Geekbench) also makes it the preferable option for Vulkan-based games and software. Furthermore, the RTX 4070’s wins in Passmark G2D and DirectX 9 suggest it handles legacy 2D applications and older games with slightly better efficiency.

Specification Differences

The most obvious difference is the form factor and power profile. The RTX 5080 Mobile is an IGP (integrated graphics processor) with an 80 W TDP, designed for laptops, and has no power connectors. The RTX 4070 is a dual-slot desktop card with a 200 W TDP, a single 16-pin power connector, and a suggested PSU of 550 W. The desktop card is physically larger, measuring 240 mm in length, 110 mm in height, and 40 mm in width, while the mobile chip has no listed dimensions.

Clock speeds tell a different story. The RTX 4070 runs at a base clock of 1920 MHz and a boost clock of 2475 MHz, significantly higher than the RTX 5080 Mobile’s 975 MHz base and 1500 MHz boost. This explains why the desktop card can win in compute tasks despite fewer cores; it is running at much higher frequencies. The memory clocks also differ: the RTX 5080 Mobile runs at 1750 MHz (28 Gbps effective), while the RTX 4070 runs at 1313 MHz (21 Gbps effective). The RTX 4070 also has a higher pixel rate (158.4 GPixel/s vs 144.0 GPixel/s) and texture rate (455.4 GTexel/s vs 360.0 GTexel/s), while the RTX 5080 Mobile counters with higher FP32 and FP16 compute (23.04 TFLOPS each vs 29.15 TFLOPS each for the desktop part). Wait, the data shows the RTX 4070 has the higher FP32 at 29.15 TFLOPS, which is a key reason for its compute win. The RTX 4070 was released on 2023-04-11, while the RTX 5080 Mobile was released on 2025-04-01.

FAQ

Q: Which GPU has a higher average benchmark score?

A: The RTX 5080 Mobile has a higher average benchmark score of 38349, compared to the RTX 4070’s 37648. Both GPUs sit at the 81st percentile against all GPUs.

Q: How much faster is the RTX 5080 Mobile in 3DMark Steel Nomad?

A: The RTX 5080 Mobile scores 4952, which is 28.5% higher than the RTX 4070’s 3854 in the 3DMark Steel Nomad DX12 test.

Q: In which benchmark does the RTX 4070 have its biggest lead?

A: The RTX 4070’s biggest lead is in the Passmark GPU Compute test, where it scores 14720, a 17.6% advantage over the RTX 5080 Mobile’s 12134.

Q: What are the memory specifications for each GPU?

A: The RTX 5080 Mobile has 16 GB of GDDR7 memory on a 256-bit bus with 896.0 GB/s bandwidth. The RTX 4070 has 12 GB of GDDR6X memory on a 192-bit bus with 504.2 GB/s bandwidth.

Q: What is the TDP of each GPU?

A: The RTX 5080 Mobile has an 80 W TDP, while the RTX 4070 has a 200 W TDP and requires a 550 W suggested PSU.

Q: Does the RTX 4070 have a higher boost clock?

A: Yes, the RTX 4070 has a boost clock of 2475 MHz, which is significantly higher than the RTX 5080 Mobile’s 1500 MHz boost clock.

The Verdict

The data dictates a clear but nuanced verdict. The NVIDIA GeForce RTX 5080 Mobile is the better choice for modern gaming, specifically DirectX 12 titles, where it holds a decisive 28.5% lead in 3DMark Steel Nomad and wins all DirectX 11 and 12 Passmark tests. Its superior memory bandwidth and larger frame buffer make it the future-proof option for high-fidelity gaming, and its 6 out of 10 benchmark wins confirm its overall dominance in the majority of tested scenarios.

However, the NVIDIA GeForce RTX 4070 remains the superior option for compute-heavy professional workloads and Vulkan-based applications. Its massive 17.6% win in the Passmark GPU Compute test, coupled with a 2.5% lead in Geekbench Vulkan, shows that the desktop card’s higher clock speeds and architecture are better suited for tasks that require raw parallel processing power. Users who prioritize rendering, simulations, or Vulkan-specific performance should choose the RTX 4070. Ultimately, the choice hinges on the primary use case: the RTX 5080 Mobile for gamers targeting the latest DirectX 12 titles, or the RTX 4070 for users who need compute muscle and Vulkan performance.