NVIDIA GeForce RTX 4080 Mobile vs NVIDIA GeForce RTX 5070 Comparison

The Verdict

The data is unambiguous: the NVIDIA GeForce RTX 5070 wins every single head-to-head benchmark in this comparison, taking all 9 tests against the RTX 4080 Mobile. The RTX 5070 posts an average benchmark score of 40377 versus 38135 for the RTX 4080 Mobile, a gap that places it in the 82nd percentile of all GPUs compared to the 4080 Mobile's 81st percentile. If you are choosing between these two for a desktop build, the RTX 5070 is the pick — it is faster in every measured category, from DirectX 9 legacy workloads to modern Vulkan and OpenCL compute. The RTX 4080 Mobile, however, is a different class of product: it is an integrated laptop part with no standalone dimensions, no power connectors, and a 110 W TDP. That makes it the choice only for portable systems where the RTX 5070's 250 W desktop design, dual-slot cooler, and 1x 16-pin power connector simply cannot fit. For anyone building a desktop, the RTX 5070 wins outright. For anyone needing a laptop GPU, the RTX 4080 Mobile is the only one of the two that exists in that form factor.

Where Each One Wins

The RTX 5070 wins every benchmark category, but the margin varies dramatically by workload. In pure compute and 2D tasks, it runs away: the PassMark GPU compute score of 15787 beats the 4080 Mobile's 11191 by 41.1%, and the PassMark G2D score of 1305 beats 929 by 40.5%. Those are the two largest deltas in the entire comparison, indicating the RTX 5070 is substantially stronger for general-purpose compute and desktop acceleration. In 3D gaming workloads, the lead is smaller but still decisive: the PassMark G3D score of 29137 is 16.9% ahead of 24926, and the DirectX 11 score of 277 is 13.5% ahead of 244. The Vulkan gap is the largest among graphics APIs — 178923 versus 145807, a 22.7% advantage — suggesting the RTX 5070 scales better with modern multi-threaded graphics workloads. The DirectX 12 score of 108 versus 96 is a 12.5% win, and even the legacy DirectX 9 test (320 vs 286) and DirectX 10 test (180 vs 157) show consistent 11.9% and 14.6% leads. The RTX 4080 Mobile's only "win" is that it exists in a mobile form factor with a 110 W TDP, making it viable for thin-and-light gaming laptops. But in raw performance, it loses every single benchmark.

Architecture Differences

The two GPUs come from different NVIDIA generations built on the same process node. The RTX 5070 uses the GB205 chip based on Blackwell 2.0 architecture, fabricated by TSMC on a 5 nm process with 31,100 million transistors on a 263 mm² die (118.3M transistors per mm²). The RTX 4080 Mobile uses the AD104 chip based on Ada Lovelace architecture, also TSMC 5 nm, with 35,800 million transistors on a larger 294 mm² die (121.8M per mm²). Despite fewer transistors, the RTX 5070 achieves higher performance thanks to architectural improvements and much higher clocks. The RTX 5070's base clock is 2325 MHz with a 2512 MHz boost, while the RTX 4080 Mobile runs at 1290 MHz base and 1665 MHz boost — a massive clock advantage for the desktop part. The RTX 5070 also uses GDDR7 memory at 1750 MHz (28 Gbps effective) on a 192-bit bus, yielding 672.0 GB/s of bandwidth. The RTX 4080 Mobile uses GDDR6 at 2250 MHz (18 Gbps effective) on the same 192-bit bus, yielding only 432.0 GB/s. That bandwidth difference of 240 GB/s is a major factor in the RTX 5070's compute and 2D wins. The RTX 4080 Mobile actually has more raw hardware: 7424 shading units, 232 TMUs, 58 RT cores, and 232 tensor cores versus the RTX 5070's 6144 shaders, 192 TMUs, 48 RT cores, and 192 tensor cores. But the RTX 5070's higher clocks and faster memory let it deliver 30.87 TFLOPS FP32 versus 24.72 TFLOPS, and 482.3 GTexel/s versus 386.3 GTexel/s. Pixel rate also favors the RTX 5070 at 201.0 GPixel/s versus 133.2 GPixel/s. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The RTX 5070 uses PCIe 5.0 x16, while the RTX 4080 Mobile uses PCIe 4.0 x16. Display outputs differ: the RTX 5070 has 1x HDMI 2.1b and 3x DisplayPort 2.1b, while the RTX 4080 Mobile is "Portable Device Dependent."

FAQ

Q: Which GPU is faster in raw compute?

A: The RTX 5070 wins the PassMark GPU compute test with 15787 points versus 11191 for the RTX 4080 Mobile, a 41.1% advantage. It also leads in Geekbench OpenCL with 172660 versus 159575, an 8.2% gap.

Q: Is the RTX 4080 Mobile competitive in any benchmark?

A: No. The head-to-head data shows the RTX 5070 winning all 9 tests. The closest margin is Geekbench OpenCL at 8.2%, and the largest margins are PassMark GPU compute (41.1%) and PassMark G2D (40.5%). The RTX 4080 Mobile wins zero benchmarks.

Q: How do the memory subsystems differ?

A: Both use 12 GB on a 192-bit bus, but the RTX 5070 uses GDDR7 at 28 Gbps effective yielding 672.0 GB/s, while the RTX 4080 Mobile uses GDDR6 at 18 Gbps effective yielding 432.0 GB/s. The RTX 5070 has 240 GB/s more bandwidth.

Q: Which GPU has more shading units?

A: The RTX 4080 Mobile has more hardware resources: 7424 shading units, 232 TMUs, 58 RT cores, and 232 tensor cores. The RTX 5070 has 6144 shaders, 192 TMUs, 48 RT cores, and 192 tensor cores. Despite this, the RTX 5070 delivers higher TFLOPS due to much higher clocks.

Q: Can the RTX 4080 Mobile be used in a desktop?

A: The data lists it as an IGP (integrated graphics processor) with no dimensions, no power connectors, and no suggested PSU. It is designed for mobile systems. The RTX 5070 is a dual-slot desktop card with 245 mm length, 115 mm height, 40 mm width, and requires a 1x 16-pin power connector with a 600 W suggested PSU.

Q: What are the power requirements for each?

A: The RTX 5070 has a 250 W TDP and requires a 600 W suggested PSU. The RTX 4080 Mobile has a 110 W TDP and no power connectors listed, as it draws power from the laptop motherboard. No other power figures are provided in the data.

Head-to-Head Benchmarks

The biggest win for the RTX 5070 comes in PassMark GPU compute, where it scores 15787 against 11191 — a 41.1% delta. This is a massive gap that reflects both the faster memory bandwidth and the higher clock speeds. The second-largest win is PassMark G2D at 40.5% (1305 vs 929), which measures 2D graphics acceleration and desktop composition. These two tests alone show that the RTX 5070 is not just a gaming card — it is substantially better at general-purpose and desktop workloads.

In the graphics API tests, the RTX 5070 leads across the board but by varying margins. Geekbench Vulkan shows a 22.7% advantage (178923 vs 145807), which is the largest graphics-specific delta. DirectX 10 shows a 14.6% lead (180 vs 157), DirectX 11 shows 13.5% (277 vs 244), DirectX 12 shows 12.5% (108 vs 96), and DirectX 9 shows 11.9% (320 vs 286). The consistency of these wins — all between 11.9% and 22.7% — suggests the RTX 5070's advantage is architectural and not specific to any one API. The DirectX 12 test is the smallest absolute gap at just 12 points, but that still represents a 12.5% relative improvement.

The PassMark G3D test, which aggregates overall 3D gaming performance, gives the RTX 5070 a 16.9% win (29137 vs 24926). This is a strong indicator for real-world gaming, where the RTX 5070 should deliver noticeably higher frame rates. The Geekbench OpenCL test shows the smallest relative win at 8.2% (172660 vs 159575), but even here the RTX 5070 is clearly ahead. Across all 9 benchmarks, the RTX 5070 wins every time, with an average delta of approximately 20% across the test suite. There is no single scenario in the data where the RTX 4080 Mobile matches or exceeds the RTX 5070.

Specification Differences

The two GPUs differ across nearly every specification field. The RTX 5070 uses the GB205 chip on Blackwell 2.0 architecture, while the RTX 4080 Mobile uses AD104 on Ada Lovelace. Both are TSMC 5 nm, but the RTX 5070 has 31,100 million transistors on a 263 mm² die, versus 35,800 million on 294 mm² for the RTX 4080 Mobile. Transistor density is close: 118.3M per mm² versus 121.8M per mm². The RTX 5070's clocks are dramatically higher: 2325 MHz base and 2512 MHz boost versus 1290 MHz base and 1665 MHz boost. Memory differs in type and speed: GDDR7 at 1750 MHz (28 Gbps effective) for the RTX 5070, GDDR6 at 2250 MHz (18 Gbps effective) for the RTX 4080 Mobile. Both have 12 GB on a 192-bit bus, but bandwidth is 672.0 GB/s versus 432.0 GB/s.

The RTX 4080 Mobile has more shading units (7424 vs 6144), TMUs (232 vs 192), RT cores (58 vs 48), and tensor cores (232 vs 192). Both have 80 ROPs. Despite fewer resources, the RTX 5070 achieves higher rates: 201.0 GPixel/s versus 133.2 GPixel/s, 482.3 GTexel/s versus 386.3 GTexel/s, and 30.87 TFLOPS FP32/FP16 versus 24.72 TFLOPS. The RTX 5070 is a 250 W dual-slot card requiring a 1x 16-pin connector and 600 W suggested PSU, while the RTX 4080 Mobile is an IGP with a 110 W TDP, no connectors, and no PSU requirement. The RTX 5070 uses PCIe 5.0 x16; the RTX 4080 Mobile uses PCIe 4.0 x16. Display outputs are 1x HDMI 2.1b plus 3x DisplayPort 2.1b for the RTX 5070, versus "Portable Device Dependent" for the RTX 4080 Mobile. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The RTX 5070 was released on 2025-03-03 with a launch MSRP of 549 USD; the RTX 4080 Mobile was released on 2023-01-02 with no MSRP listed. The RTX 5070's predecessor is GeForce 40 and successor is GeForce 60; the RTX 4080 Mobile's predecessor is GeForce 30 Mobile and successor is GeForce 50 Mobile.