NVIDIA GeForce RTX 4090 Mobile vs NVIDIA Rubin GPU Comparison

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark results for these two GPUs, as the NVIDIA Rubin GPU has no recorded benchmark scores. The GeForce RTX 4090 Mobile, however, has a full set of measurements across nine distinct tests, with an average benchmark score of 43,667. The Rubin GPU shows an average benchmark score of 0, which places it at the 50th percentile of all GPUs in the database, while the RTX 4090 Mobile sits at the 84th percentile.

For the RTX 4090 Mobile, the recorded data shows its strongest showing in Passmark G3D with a score of 27,212, followed by Geekbench OpenCL at 180,831 and Geekbench Vulkan at 170,774. The compute-oriented Passmark GPU Compute test delivers 12,347, while the legacy DirectX tests produce lower figures: DirectX 9 scores 310, DirectX 11 scores 262, DirectX 10 scores 173, and DirectX 12 scores 107. The 2D graphics test records 984.

Since the Rubin GPU has no benchmark entries, direct numerical comparison is impossible. The RTX 4090 Mobile's nearest rivals in the database provide context for its standing. It leads the NVIDIA Quadro M6000 by 0.8%, with the M6000 averaging 43,301. It also edges the GeForce RTX 5050 Mobile by 0.9% (43,268 average) and the Quadro M6000 24 GB by 0.9% (43,262 average). The NVIDIA RTX A6000 sits slightly ahead at 44,075, a 0.9% advantage over the RTX 4090 Mobile.

The absence of Rubin GPU benchmarks means the data cannot confirm any performance relationship between the two. The RTX 4090 Mobile's measurements are self-contained, and the Rubin GPU's percentile of 50 with zero average score reflects no recorded data rather than an actual performance level.

The Verdict

From the recorded data alone, the GeForce RTX 4090 Mobile is the only one of the two with measurable performance. Its 84th percentile ranking across all GPUs in the database and its average score of 43,667 indicate a functional, competitive part. The Rubin GPU, with no benchmarks and an average score of 0, cannot be evaluated on performance grounds; the database records no evidence of its capabilities.

For users selecting based on available measurements, the RTX 4090 Mobile is the logical choice. It is positioned near the RTX A6000 in average score, trailing by only 0.9%, and leads several Quadro and RTX 50-series mobile parts by margins under 1%. The Rubin GPU's server-oriented design, with its 2300 W power draw and SXM module form factor, targets a different deployment scenario, but the data offers no benchmark support for that role.

The RTX 4090 Mobile suits portable gaming and workstation use, given its 120 W power draw, IGP slot width, and portable-device-dependent display outputs. The Rubin GPU, with no display outputs and a 2700 W suggested PSU, is a datacenter compute part by specification, but the database contains no test results to substantiate its intended purpose.

FAQ

Q: Does the database show which GPU has a higher average benchmark score?

A: Yes. The GeForce RTX 4090 Mobile has an average benchmark score of 43,667 across nine tests. The NVIDIA Rubin GPU has an average benchmark score of 0 with no recorded tests.

Q: How does the RTX 4090 Mobile compare to its nearest rivals in average score?

A: It leads the Quadro M6000 by 0.8% (43,301 average), the GeForce RTX 5050 Mobile by 0.9% (43,268 average), and the Quadro M6000 24 GB by 0.9% (43,262 average). The RTX A6000 leads it by 0.9% with a 44,075 average.

Q: What is the best individual benchmark result for the RTX 4090 Mobile?

A: The highest recorded score is 180,831 in Geekbench OpenCL, followed by 170,774 in Geekbench Vulkan and 27,212 in Passmark G3D.

Q: Does the Rubin GPU have any benchmark results in the database?

A: No. The Rubin GPU has an empty benchmark list, and its average benchmark score is 0.

Q: What percentile ranking does each GPU hold?

A: The RTX 4090 Mobile is at the 84th percentile of all GPUs, while the Rubin GPU is at the 50th percentile, which reflects its lack of recorded data.

Q: Which GPU has the higher transistor density?

A: The Rubin GPU has a transistor density of 230.8M per mm², compared to 121.1M per mm² for the RTX 4090 Mobile.

Specification Differences

The two GPUs differ sharply across nearly every recorded specification. The RTX 4090 Mobile uses a 256-bit memory bus with 16 GB of GDDR6 memory, delivering 576.0 GB/s of bandwidth. The Rubin GPU uses a 16384-bit bus with 288 GB of HBM4 memory, delivering 22.1 TB/s of bandwidth.

Clock speeds diverge as well. The RTX 4090 Mobile has a base clock of 1335 MHz and a boost clock of 1695 MHz, with memory running at 2250 MHz (18 Gbps effective). The Rubin GPU has a base clock of 700 MHz, a boost clock of 2267 MHz, and memory at 2695 MHz (10.8 Gbps effective).

Compute resources differ substantially. The RTX 4090 Mobile carries 9,728 shading units, 304 TMUs, 112 ROPs, 76 RT cores, and 304 tensor cores. The Rubin GPU carries 28,672 shading units, 896 TMUs, 24 ROPs, no recorded RT cores, and 896 tensor cores. Pixel rate for the RTX 4090 Mobile is 189.8 GPixel/s versus 54.41 GPixel/s for the Rubin GPU. Texture rate is 515.3 GTexel/s versus 2,031.2 GTexel/s.

FP32 throughput is 32.98 TFLOPS for the RTX 4090 Mobile and 130.0 TFLOPS for the Rubin GPU. FP16 throughput is 32.98 TFLOPS (1:1) for the RTX 4090 Mobile and 260.0 TFLOPS (2:1) for the Rubin GPU.

Power and form factor differ completely. The RTX 4090 Mobile draws 120 W, uses an IGP slot width, and has no power connectors. The Rubin GPU draws 2300 W, uses an SXM Module slot width, and has a suggested PSU of 2700 W.

Bus interface and display outputs also separate the two. The RTX 4090 Mobile uses PCIe 4.0 x16 with portable-device-dependent display outputs. The Rubin GPU uses PCIe 6.0 x16 with no display outputs.

Architecture Differences

The RTX 4090 Mobile is built on the AD103 chip using the Ada Lovelace architecture, manufactured on a 5 nm process at TSMC. It contains 45,900 million transistors on a 379 mm² die. Its API support includes DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

The Rubin GPU is built on the GR100 chip using the Rubin architecture, manufactured on a 3 nm process at TSMC. It contains 336,000 million transistors on a 1456 mm² die. Its API support is listed as N/A for DirectX, OpenGL, and Vulkan.

The transistor density reflects the process difference: 121.1M per mm² for the RTX 4090 Mobile versus 230.8M per mm² for the Rubin GPU. The Rubin GPU's transistor count is roughly 7.3 times higher, and its die area is about 3.8 times larger, but the database records no architectural feature details beyond these figures.

The RTX 4090 Mobile belongs to the GeForce 40 Mobile generation, with the GeForce 30 Mobile as predecessor and GeForce 50 Mobile as successor. The Rubin GPU belongs to the Server Rubin (Rxx) generation, with Server Blackwell as predecessor and no recorded successor. The RTX 4090 Mobile was released on 2023-01-02, while the Rubin GPU's release date is 2025-12-31.

Where Each One Wins

Based solely on recorded data, the RTX 4090 Mobile wins in every measurable category because the Rubin GPU has no benchmark results. The RTX 4090 Mobile's win profile includes compute workloads, as shown by its Geekbench OpenCL score of 180,831 and Passmark GPU Compute score of 12,347. Graphics workloads are also covered, with Geekbench Vulkan at 170,774 and Passmark G3D at 27,212.

The RTX 4090 Mobile is the only option with display output capability, listed as portable device dependent. Its 120 W power draw and IGP form factor make it suitable for mobile systems, and its API support for DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 enables standard graphics application compatibility.

The Rubin GPU's specification sheet points to a server compute role, with its SXM module form factor, 2300 W power draw, 288 GB HBM4 memory, and 22.1 TB/s bandwidth. Its FP16 throughput of 260.0 TFLOPS is double its FP32 rate, indicating a 2:1 ratio optimized for mixed-precision compute. The RTX 4090 Mobile has a 1:1 FP16 to FP32 ratio at 32.98 TFLOPS for both.

The Rubin GPU's 16384-bit memory bus and 22.1 TB/s bandwidth are substantially larger than the RTX 4090 Mobile's 256-bit bus and 576.0 GB/s. Its 28672 shading units and 896 tensor cores exceed the RTX 4090 Mobile's 9,728 shading units and 304 tensor cores. However, the Rubin GPU has only 24 ROPs versus 112 for the RTX 4090 Mobile, and the database records no RT cores for it.

The Rubin GPU's lack of display outputs and N/A API support means it cannot be used for conventional graphics rendering as recorded. The RTX 4090 Mobile, with active production status and a full set of benchmark scores, is the only one of the two with demonstrated performance in the database. The Rubin GPU's production status is also active, but its zero benchmark count leaves its actual performance unverified.