NVIDIA GeForce RTX 4080 Mobile vs NVIDIA GeForce RTX 5090 Mobile Comparison

Head-to-Head Benchmarks

The recorded data shows a decisive sweep for the NVIDIA GeForce RTX 5090 Mobile, winning all nine head-to-head benchmark comparisons against the NVIDIA GeForce RTX 4080 Mobile. The most significant margin appears in the DirectX 12 test, where the RTX 5090 Mobile scores 138 compared to the RTX 4080 Mobile's 96, a 43.8% advantage. This indicates a substantial performance uplift in modern graphics workloads that rely heavily on DirectX 12 features.

The Vulkan results reinforce this trend. The RTX 5090 Mobile achieves 198,405 in the Geekbench Vulkan test, while the RTX 4080 Mobile manages 145,807. The delta here is 36.1%, making it the second-largest gap between the two. For compute-oriented tasks, the Geekbench OpenCL test shows the RTX 5090 Mobile at 201,834 versus 159,575 for the RTX 4080 Mobile, a 26.5% lead. This suggests the newer architecture handles general-purpose GPU compute with considerably more efficiency.

In the Passmark G3D suite, which aggregates overall 3D graphics performance, the RTX 5090 Mobile posts 30,034 against the RTX 4080 Mobile's 24,926, a 20.5% difference. The GPU compute test shows a similar pattern, with the RTX 5090 Mobile scoring 13,401 and the RTX 4080 Mobile scoring 11,191, a 19.7% gap. These two tests together indicate that the performance advantage is not limited to a single API but spans both gaming and compute workloads.

Smaller but consistent margins appear in the legacy DirectX tests. The DirectX 10 score is 183 for the RTX 5090 Mobile versus 157 for the RTX 4080 Mobile, a 16.6% lead. DirectX 9 shows a 13.3% advantage, with scores of 324 and 286 respectively. DirectX 11 narrows further to a 10.2% difference, 269 against 244. The 2D graphics test, Passmark G2D, rounds out the sweep with a 13.8% margin, 1057 versus 929.

The average benchmark score across all recorded tests places the RTX 5090 Mobile at 45,152, while the RTX 4080 Mobile sits at 38,135. The RTX 5090 Mobile also holds a higher percentile ranking among all GPUs, at the 84th percentile compared to the 81st percentile for the RTX 4080 Mobile. Every recorded metric confirms the RTX 5090 Mobile as the stronger performer, with no single test favoring the older RTX 4080 Mobile.

Architecture Differences

The architectural gap between these two mobile GPUs is substantial. The RTX 5090 Mobile is built on the Blackwell 2.0 architecture using the GB203 chip, while the RTX 4080 Mobile uses the Ada Lovelace architecture with the AD104 chip. Both are manufactured on a 5 nm process at TSMC, but the transistor counts differ markedly: the GB203 packs 45,600 million transistors on a 378 mm² die, whereas the AD104 contains 35,800 million transistors on a 294 mm² die. Transistor density is nearly identical, at 120.6M per mm² for the RTX 5090 Mobile and 121.8M per mm² for the RTX 4080 Mobile, indicating that the larger die on the newer part is the primary driver of its higher transistor count.

Core counts scale accordingly. The RTX 5090 Mobile features 10,496 shading units, 328 texture mapping units, and 112 raster operation units. The RTX 4080 Mobile is smaller in each category, with 7,424 shading units, 232 TMUs, and 80 ROPs. Ray tracing hardware also expands, with 82 RT cores on the RTX 5090 Mobile versus 58 on the RTX 4080 Mobile. Tensor cores follow the same pattern, 328 on the newer part against 232 on the older one.

Memory configuration is a major differentiator. The RTX 5090 Mobile comes with 24 GB of GDDR7 memory on a 256-bit bus, yielding a bandwidth of 896.0 GB/s. The RTX 4080 Mobile offers 12 GB of GDDR6 memory on a 192-bit bus, with a bandwidth of 432.0 GB/s. The memory clock also differs, with the RTX 5090 Mobile running at 1750 MHz (28 Gbps effective) and the RTX 4080 Mobile at 2250 MHz (18 Gbps effective). The result is a doubling of memory capacity and more than double the bandwidth on the newer part.

Clock speeds tell a nuanced story. The RTX 4080 Mobile has higher base and boost clocks, at 1290 MHz and 1665 MHz respectively, compared to the RTX 5090 Mobile's 990 MHz base and 1515 MHz boost. Despite the lower clocks, the RTX 5090 Mobile achieves higher throughput due to its larger core count and faster memory. Pixel rate and texture rate both favor the RTX 5090 Mobile: 169.7 GPixel/s and 496.9 GTexel/s versus 133.2 GPixel/s and 386.3 GTexel/s for the RTX 4080 Mobile. Floating point performance follows, with the RTX 5090 Mobile delivering 31.80 TFLOPS in both FP32 and FP16 (1:1), while the RTX 4080 Mobile delivers 24.72 TFLOPS in both.

Power and interface specifications also differ. The RTX 5090 Mobile has a TDP of 95 W, while the RTX 4080 Mobile draws 110 W. The newer part uses PCIe 5.0 x16, whereas the RTX 4080 Mobile is limited to PCIe 4.0 x16. Both are integrated into the laptop as IGP parts with no external power connectors, and display outputs are portable device dependent for both. The RTX 5090 Mobile was released on 2025-03-26, while the RTX 4080 Mobile came earlier on 2023-01-02.

FAQ

Q: Which GPU wins the DirectX 12 benchmark?

A: The NVIDIA GeForce RTX 5090 Mobile wins decisively, scoring 138 against the RTX 4080 Mobile's 96, a 43.8% advantage.

Q: How large is the memory capacity difference?

A: The RTX 5090 Mobile has 24 GB of GDDR7 memory, while the RTX 4080 Mobile has 12 GB of GDDR6 memory. The RTX 5090 Mobile also has a 256-bit bus versus 192-bit, resulting in 896.0 GB/s bandwidth versus 432.0 GB/s.

Q: Does the RTX 4080 Mobile have a higher clock speed?

A: Yes, the RTX 4080 Mobile has a higher base clock of 1290 MHz and a boost clock of 1665 MHz, compared to 990 MHz base and 1515 MHz boost on the RTX 5090 Mobile. Despite this, the RTX 5090 Mobile performs better due to its larger core count and faster memory.

Q: What are the power consumption levels for both GPUs?

A: The RTX 5090 Mobile has a TDP of 95 W, while the RTX 4080 Mobile has a TDP of 110 W. The newer part is more power-efficient despite delivering higher performance.

Q: Which GPU has more ray tracing cores?

A: The RTX 5090 Mobile has 82 RT cores, while the RTX 4080 Mobile has 58 RT cores. The RTX 5090 Mobile also has 328 tensor cores versus 232 on the RTX 4080 Mobile.

Q: How do the overall average benchmark scores compare?

A: The RTX 5090 Mobile has an average benchmark score of 45,152, placing it in the 84th percentile of all GPUs. The RTX 4080 Mobile scores 38,135 on average, which puts it in the 81st percentile.

Specification Differences

| Specification | NVIDIA GeForce RTX 5090 Mobile | NVIDIA GeForce RTX 4080 Mobile |

|----------------|-------------------------------|-------------------------------|

| Architecture | Blackwell 2.0 | Ada Lovelace |

| Chip | GB203 | AD104 |

| Transistors | 45,600 million | 35,800 million |

| Die Size | 378 mm² | 294 mm² |

| Base Clock | 990 MHz | 1290 MHz |

| Boost Clock | 1515 MHz | 1665 MHz |

| Memory Clock | 1750 MHz (28 Gbps effective) | 2250 MHz (18 Gbps effective) |

| Memory Size | 24 GB | 12 GB |

| Memory Type | GDDR7 | GDDR6 |

| Bus Width | 256 bit | 192 bit |

| Bandwidth | 896.0 GB/s | 432.0 GB/s |

| Shading Units | 10496 | 7424 |

| TMUs | 328 | 232 |

| ROPs | 112 | 80 |

| RT Cores | 82 | 58 |

| Tensor Cores | 328 | 232 |

| Pixel Rate | 169.7 GPixel/s | 133.2 GPixel/s |

| Texture Rate | 496.9 GTexel/s | 386.3 GTexel/s |

| FP32/FP16 | 31.80 TFLOPS | 24.72 TFLOPS |

| TDP | 95 W | 110 W |

| Bus Interface | PCIe 5.0 x16 | PCIe 4.0 x16 |

| Release Date | 2025-03-26 | 2023-01-02 |

Where Each One Wins

The NVIDIA GeForce RTX 5090 Mobile wins in every recorded benchmark category, from legacy DirectX 9 to modern DirectX 12, and from compute workloads to 2D graphics. Its largest advantages are in DirectX 12 (43.8%) and Vulkan (36.1%), which are the most relevant APIs for current-generation gaming and professional applications. The 26.5% lead in OpenCL and 19.7% lead in GPU compute make it the clear choice for compute-heavy tasks such as rendering, simulation, or machine learning workloads that leverage tensor cores.

The RTX 5080 Mobile, which appears in the nearest rivals list for the RTX 4080 Mobile, is the closest competitor in the database, with an average score of 38,349 and a delta of -0.6% relative to the RTX 4080 Mobile. This suggests the RTX 4080 Mobile remains competitive within its own generation, but the RTX 5090 Mobile sits in a higher performance class entirely, as shown by its nearest rivals: the AMD Radeon Pro 5500 XT at 45,384, the NVIDIA GeForce RTX 4070 Ti at 44,795, and the Intel Arc A730M at 45,592. The RTX 5090 Mobile's average score of 45,152 places it alongside these desktop-class parts, far above the RTX 4080 Mobile's average of 38,135.

For users prioritizing battery life or thermal headroom, the RTX 5090 Mobile's lower TDP of 95 W versus 110 W is a notable advantage, as it achieves higher performance with lower power draw. The RTX 4080 Mobile offers no wins in the recorded data, so there is no category where it is the recommended pick based on benchmark results.

The Verdict

The data is unambiguous. The NVIDIA GeForce RTX 5090 Mobile outperforms the NVIDIA GeForce RTX 4080 Mobile across every single recorded benchmark, with margins ranging from 10.2% in DirectX 11 to 43.8% in DirectX 12. The newer Blackwell 2.0 architecture, larger die, higher core counts, doubled memory capacity, and more than doubled memory bandwidth all contribute to this result.

Users who need the highest possible graphics performance in a laptop should choose the RTX 5090 Mobile. It delivers a 20.5% lead in overall 3D graphics performance (Passmark G3D) and a 36.1% lead in Vulkan, making it the stronger option for gaming, content creation, and GPU-accelerated compute. The 24 GB memory capacity is double that of the RTX 4080 Mobile, which matters for large datasets or high-resolution textures.

Users who already own an RTX 4080 Mobile laptop should note that the RTX 5090 Mobile represents a significant generational leap, but the RTX 4080 Mobile still holds its own against its closest rivals in the database, including the RTX 5080 Mobile with a delta of only -0.6%. There is no benchmark in the recorded data where the RTX 4080 Mobile wins, so the verdict is straightforward: the RTX 5090 Mobile is the superior GPU by every measurable metric, and the RTX 4080 Mobile is best suited for users who do not require the absolute maximum performance available in the current mobile GPU lineup.