NVIDIA GeForce RTX 4080 Mobile vs NVIDIA GeForce RTX 5070 Ti Comparison

The NVIDIA GeForce RTX 5070 Ti and the NVIDIA GeForce RTX 4080 Mobile represent two distinct approaches to high-performance graphics, one as a desktop flagship and the other as a laptop part. The benchmark data in the database shows a decisive performance gap, with the RTX 5070 Ti winning all nine head-to-head comparisons. The most significant margin appears in compute-heavy workloads, where the desktop card’s advantage is substantial. This analysis breaks down the recorded scores, architectural differences, and practical implications for each GPU.

Head-to-Head Benchmarks

The recorded data shows a clean sweep for the RTX 5070 Ti across every test in the comparison set. The largest delta appears in the Passmark GPU Compute test, where the RTX 5070 Ti scores 20,203 against the RTX 4080 Mobile’s 11,191, a massive 80.5% advantage. This result highlights a stark difference in raw throughput for non-graphics workloads, such as rendering or machine learning inference. It is the single biggest win in the entire head-to-head dataset.

In graphics-centric benchmarks, the margins are smaller but still decisive. The Geekbench Vulkan test shows the RTX 5070 Ti at 225,122 versus 145,807 for the RTX 4080 Mobile, a 54.4% lead. This indicates a strong advantage in modern API-driven gaming and compute tasks. The OpenCL score follows a similar pattern: 212,363 for the RTX 5070 Ti against 159,575 for the mobile part, a 33.1% gap. These results suggest the desktop GPU maintains a comfortable lead in general-purpose GPU acceleration.

DirectX benchmarks show consistent wins for the RTX 5070 Ti. In Passmark DirectX 12, the score is 127 versus 96, a 32.3% delta, while DirectX 11 shows 300 against 244, a 23% lead. The DirectX 10 and DirectX 9 tests show 192 versus 157 (22.3%) and 351 versus 286 (22.7%), respectively. These figures indicate that the RTX 5070 Ti’s advantage holds across both legacy and modern graphics APIs, with no single test where the mobile GPU can close the gap.

The Passmark G3D score, a composite measure of gaming performance, records 32,974 for the RTX 5070 Ti against 24,926 for the RTX 4080 Mobile, a 32.3% difference. The 2D graphics test shows a 43.4% lead for the desktop card (1,332 versus 929), which is notable for desktop productivity tasks. Overall, the average benchmark score for the RTX 5070 Ti is 49,957, placing it in the 86th percentile of all GPUs, while the RTX 4080 Mobile averages 38,135, landing in the 81st percentile. The nearest rivals for the RTX 5070 Ti include the AMD Radeon RX 6900 XT (2% lower average score) and the RX 6800 XT (3.1% lower), while the RTX 4080 Mobile sits close to the NVIDIA GeForce MX570 (0.4% lower) and the RTX 5080 Mobile (0.6% lower).

Architecture Differences

The two GPUs come from different NVIDIA generations and are built on distinct architectures. The RTX 5070 Ti uses the GB203 chip based on the Blackwell 2.0 architecture, while the RTX 4080 Mobile uses the AD104 chip from the Ada Lovelace architecture. Both are fabricated on a 5 nm process at TSMC, but the transistor counts differ significantly. The GB203 packs 45,600 million transistors on a 378 mm² die, yielding a density of 120.6 million transistors per square millimeter. In contrast, the AD104 has 35,800 million transistors on a 294 mm² die, with a slightly higher density of 121.8 million per square millimeter.

The core configurations reflect the performance gap. The RTX 5070 Ti features 8,960 shading units, 280 texture mapping units, and 96 ROPs. It also includes 70 RT cores and 280 tensor cores. The RTX 4080 Mobile is smaller in every category, with 7,424 shading units, 232 TMUs, 80 ROPs, 58 RT cores, and 232 tensor cores. This translates directly into higher fill rates for the desktop part: the RTX 5070 Ti achieves a pixel rate of 235.4 GPixel/s and a texture rate of 686.6 GTexel/s, versus 133.2 GPixel/s and 386.3 GTexel/s for the mobile GPU.

Memory architecture is another differentiator. The RTX 5070 Ti uses 16 GB of GDDR7 memory on a 256-bit bus, delivering 896.0 GB/s of bandwidth. The RTX 4080 Mobile uses 12 GB of GDDR6 on a 192-bit bus, with a bandwidth of 432.0 GB/s. This means the desktop card has more than double the memory bandwidth, a critical factor for high-resolution textures and compute workloads. Clock speeds also favor the RTX 5070 Ti, with a base clock of 2295 MHz and boost of 2452 MHz, compared to 1290 MHz base and 1665 MHz boost for the mobile part. The memory clock is 1750 MHz (28 Gbps effective) for the RTX 5070 Ti versus 2250 MHz (18 Gbps effective) for the RTX 4080 Mobile.

The FP32 compute throughput is 43.94 TFLOPS for the RTX 5070 Ti, exactly double the 24.72 TFLOPS of the RTX 4080 Mobile. Both cards support FP16 at a 1:1 ratio, meaning the RTX 5070 Ti also doubles the mobile part in that metric. The power envelope is vastly different: the RTX 5070 Ti has a TDP of 300 W, while the RTX 4080 Mobile is rated at 110 W. This explains the performance difference, as the desktop card has far more thermal headroom to sustain high clocks.

FAQ

Q: Which GPU has higher memory bandwidth?

A: The NVIDIA GeForce RTX 5070 Ti has a bandwidth of 896.0 GB/s, which is more than double the 432.0 GB/s of the RTX 4080 Mobile. This is due to its 256-bit bus and GDDR7 memory versus the 192-bit GDDR6 setup of the mobile part.

Q: How much faster is the RTX 5070 Ti in compute workloads?

A: In the Passmark GPU Compute test, the RTX 5070 Ti scores 20,203, which is 80.5% higher than the RTX 4080 Mobile’s 11,191. The FP32 throughput is 43.94 TFLOPS versus 24.72 TFLOPS.

Q: What are the DirectX 12 performance differences?

A: The RTX 5070 Ti scores 127 in Passmark DirectX 12, while the RTX 4080 Mobile scores 96, giving the desktop card a 32.3% advantage. Both support DirectX 12 Ultimate.

Q: Does the RTX 4080 Mobile have any advantage in the benchmark data?

A: No, the RTX 5070 Ti wins all nine head-to-head benchmarks. The RTX 4080 Mobile does not record a single victory in any test.

Q: How do the transistor densities compare?

A: The RTX 4080 Mobile has a slightly higher transistor density at 121.8 million per square millimeter, compared to 120.6 million for the RTX 5070 Ti. Both are fabricated on the same 5 nm TSMC process.

Q: What is the memory size difference?

A: The RTX 5070 Ti has 16 GB of GDDR7, while the RTX 4080 Mobile has 12 GB of GDDR6. The desktop card also has a wider 256-bit bus versus the mobile part’s 192-bit bus.

Specification Differences

The two GPUs differ across nearly every core specification. The RTX 5070 Ti uses the GB203 chip with Blackwell 2.0 architecture, while the RTX 4080 Mobile uses AD104 with Ada Lovelace. The transistor count is 45,600 million for the RTX 5070 Ti versus 35,800 million for the mobile part. Die size measures 378 mm² against 294 mm².

Clock speeds are significantly higher on the desktop card: base 2295 MHz versus 1290 MHz, and boost 2452 MHz versus 1665 MHz. The memory configuration is 16 GB GDDR7 on a 256-bit bus for the RTX 5070 Ti, compared to 12 GB GDDR6 on a 192-bit bus for the RTX 4080 Mobile. Bandwidth is 896.0 GB/s versus 432.0 GB/s.

The core counts show a clear hierarchy: 8,960 shading units versus 7,424, 280 TMUs versus 232, and 96 ROPs versus 80. The RT cores number 70 versus 58, and tensor cores are 280 versus 232. Pixel rate is 235.4 GPixel/s versus 133.2 GPixel/s, and texture rate is 686.6 GTexel/s versus 386.3 GTexel/s. FP32 performance is 43.94 TFLOPS versus 24.72 TFLOPS.

Power and physical design are radically different. The RTX 5070 Ti has a 300 W TDP, requires a 16-pin power connector, and is a dual-slot card measuring 304 mm in length. The RTX 4080 Mobile has a 110 W TDP, no power connector, and is an IGP with dimensions dependent on the portable device. The bus interface is PCIe 5.0 x16 for the desktop card versus PCIe 4.0 x16 for the mobile part. Display outputs are 1x HDMI 2.1b and 3x DisplayPort 2.1b for the RTX 5070 Ti, while the RTX 4080 Mobile relies on portable device outputs. The release dates are 2025-02-19 for the RTX 5070 Ti and 2023-01-02 for the RTX 4080 Mobile.

Where Each One Wins

The RTX 5070 Ti is the clear winner in every measured category, making it the superior choice for desktop systems where power and cooling are not constraints. Its 80.5% lead in compute performance makes it well-suited for content creation, 3D rendering, and AI workloads that leverage CUDA cores. The 54.4% advantage in Vulkan performance suggests it handles modern game engines with ease, and the higher memory bandwidth (896.0 GB/s) is a major asset for 4K gaming and large texture sets. The 16 GB VRAM capacity also provides more headroom for future titles and demanding mods.

The RTX 4080 Mobile’s only advantage lies in its form factor and power efficiency. With a 110 W TDP, it is designed for laptops, where the RTX 5070 Ti’s 300 W TDP and dual-slot cooler are physically impossible. Its 12 GB VRAM is still ample for most games at 1080p and 1440p, and the 432.0 GB/s bandwidth is respectable for a mobile part. The RTX 4080 Mobile is not a competitor to the RTX 5070 Ti in raw performance, but it offers a reasonable level of performance in a portable package. For users who need a desktop replacement, the RTX 5070 Ti is the obvious choice. For those who prioritize mobility, the RTX 4080 Mobile provides a capable alternative, though the benchmark data shows it trails the desktop card by 32% or more in most tests.