NVIDIA GeForce RTX 5080 Mobile vs NVIDIA Rubin GPU Comparison

FAQ

Q: How does the NVIDIA GeForce RTX 5080 Mobile compare to the NVIDIA Rubin GPU in terms of average benchmark scores?

A: The RTX 5080 Mobile has an average benchmark score of 38,349 across its recorded tests. The Rubin GPU has no recorded benchmarks in the database, resulting in an average score of 0 and a percentile standing of 50 among all GPUs.

Q: What are the key memory specifications for each GPU?

A: The RTX 5080 Mobile uses 16 GB of GDDR7 memory on a 256-bit bus, delivering 896.0 GB/s of bandwidth. The Rubin GPU uses 288 GB of HBM4 memory on a 16,384-bit bus, delivering 22.1 TB/s of bandwidth, which corresponds to a 4,096-bit difference in bus width.

Q: Which GPU has a higher transistor count and how does that relate to die size?

A: The Rubin GPU has 336,000 million transistors on a 1456 mm² die, while the RTX 5080 Mobile has 45,600 million transistors on a 378 mm² die. The transistor density is 230.8M per mm² for Rubin versus 120.6M per mm² for the RTX 5080 Mobile.

Q: What are the process nodes for both GPUs?

A: The RTX 5080 Mobile is built on a 5 nm process, while the Rubin GPU uses a 3 nm process. Both are fabricated by TSMC.

Q: What is the power consumption profile for each?

A: The RTX 5080 Mobile has a TDP of 80 W and uses no power connectors, fitting an IGP slot width. The Rubin GPU has a TDP of 2300 W, uses an SXM Module slot width, and requires a suggested PSU of 2700 W.

Q: Which GPU has higher FP32 and FP16 compute throughput?

A: The Rubin GPU delivers 130.0 TFLOPS in FP32 and 260.0 TFLOPS in FP16 (2:1 ratio). The RTX 5080 Mobile delivers 23.04 TFLOPS in both FP32 and FP16 (1:1 ratio).

Architecture Differences

The two GPUs represent fundamentally different design targets within NVIDIA's lineup. The RTX 5080 Mobile is part of the GeForce 50-series, built on the Blackwell 2.0 architecture with the GB203 chip. It targets mobile systems with a 5 nm TSMC process, 45,600 million transistors, and a 378 mm² die. The Rubin GPU, in contrast, belongs to the Server Rubin generation, uses the GR100 chip, and applies the Rubin architecture on a 3 nm TSMC process. Its transistor count reaches 336,000 million across a 1456 mm² die, yielding a density of 230.8M transistors per mm² compared to 120.6M for the mobile part.

Core configurations differ substantially. The RTX 5080 Mobile has 7,680 shading units, 240 TMUs, 96 ROPs, 60 RT cores, and 240 tensor cores. The Rubin GPU has 28,672 shading units, 896 TMUs, 24 ROPs, and 896 tensor cores. Notably, the Rubin GPU has no listed RT core count in the database, while its ROP count is only 24, a quarter of the mobile GPU's 96. The shading unit advantage for Rubin is roughly 3.7 times, and the tensor core count is also 896 versus 240.

Memory architecture diverges sharply. The RTX 5080 Mobile uses GDDR7 memory with a 256-bit bus, while the Rubin GPU employs HBM4 memory across a 16,384-bit bus. This bus width difference is central to the bandwidth gap: 896.0 GB/s versus 22.1 TB/s. Clock behavior also differs. The mobile GPU runs at a base of 975 MHz and a boost of 1500 MHz, whereas the Rubin GPU has a lower base of 700 MHz but a much higher boost of 2267 MHz. Memory clocks are 1750 MHz (28 Gbps effective) for the RTX 5080 Mobile and 2695 MHz (10.8 Gbps effective) for Rubin.

The interface and output capabilities mark another separation. The RTX 5080 Mobile uses PCIe 5.0 x16 and has display outputs rated as portable device dependent. The Rubin GPU uses PCIe 6.0 x16 and has no display outputs, consistent with its server role. API support also differs: the RTX 5080 Mobile supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, while the Rubin GPU has no API support listed, with DirectX, OpenGL, and Vulkan all marked as not available.

Head-to-Head Benchmarks

The database contains no head-to-head benchmark entries for these two GPUs, so a direct test-by-test comparison is not possible from the recorded data. However, the RTX 5080 Mobile has a full set of benchmark scores, while the Rubin GPU has none. This absence of comparable measurements means the analysis must rely on the architectural and specification data alone.

For the RTX 5080 Mobile, the recorded benchmarks show a spread across different workloads. In 3DMark Steel Nomad DX12, it scores 4,952. Geekbench results are 166,986 in OpenCL and 169,754 in Vulkan. Passmark tests cover multiple DirectX versions: DirectX 10 scores 171, DirectX 11 scores 253, DirectX 12 scores 116, and DirectX 9 scores 314. The Passmark G2D score is 1,095, while G3D reaches 27,711 and GPU compute hits 12,134. Its average benchmark score is 38,349, placing it at the 81st percentile among all GPUs in the database.

The nearest rivals for the RTX 5080 Mobile provide context for its standing. The NVIDIA GeForce MX570 has an average score of 38,299, a delta of 0.1 percent from the RTX 5080 Mobile. The NVIDIA GeForce RTX 4080 Mobile scores 38,135, a delta of 0.6 percent. On the other side, the NVIDIA GeForce MX570 A scores 38,691, a delta of negative 0.9 percent, and the AMD Radeon Pro 580X scores 38,706, also a delta of negative 0.9 percent. These small deltas indicate that the RTX 5080 Mobile sits within a tight cluster of GPU scores, with its average being essentially level with the MX570 and only slightly below the MX570 A and Radeon Pro 580X.

For the Rubin GPU, the lack of benchmark scores means no wins can be attributed from direct measurements. Its percentile of 50 is a default value in the database, not a result of testing. The specification data, however, shows large theoretical advantages in shading units, memory bandwidth, and compute throughput. The FP32 rate of 130.0 TFLOPS is over 5.6 times the RTX 5080 Mobile's 23.04 TFLOPS. Texture rate for Rubin is 2,031.2 GTexel/s versus 360.0 GTexel/s for the mobile part, a margin of roughly 5.6 times. Pixel rate is one area where the mobile GPU leads: 144.0 GPixel/s versus 54.41 GPixel/s for Rubin.

Specification Differences

The two GPUs differ across nearly every specification field in the database. Process node is 5 nm for the RTX 5080 Mobile and 3 nm for the Rubin GPU. Transistor count is 45,600 million versus 336,000 million, and die size is 378 mm² versus 1456 mm², giving transistor densities of 120.6M per mm² and 230.8M per mm², respectively.

Memory size is 16 GB for the RTX 5080 Mobile and 288 GB for the Rubin GPU. Memory type is GDDR7 versus HBM4. Bus width is 256 bit versus 16,384 bit. Bandwidth is 896.0 GB/s versus 22.1 TB/s. Base clock is 975 MHz versus 700 MHz, and boost clock is 1500 MHz versus 2267 MHz. Memory clock is 1750 MHz (28 Gbps effective) versus 2695 MHz (10.8 Gbps effective).

Shading units are 7,680 versus 28,672. TMUs are 240 versus 896. ROPs are 96 versus 24. RT cores are 60 versus no listed value. Tensor cores are 240 versus 896. Pixel rate is 144.0 GPixel/s versus 54.41 GPixel/s. Texture rate is 360.0 GTexel/s versus 2,031.2 GTexel/s. FP32 is 23.04 TFLOPS versus 130.0 TFLOPS. FP16 is 23.04 TFLOPS (1:1) versus 260.0 TFLOPS (2:1).

TDP is 80 W versus 2300 W. Slot width is IGP versus SXM Module. Power connectors are none for the RTX 5080 Mobile, while the Rubin GPU has no listed connectors but a suggested PSU of 2700 W. Bus interface is PCIe 5.0 x16 versus PCIe 6.0 x16. Display outputs are portable device dependent versus no outputs. API support is DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 for the mobile GPU, with all APIs listed as not available for Rubin.

Release dates differ as well: the RTX 5080 Mobile was released on 2025-04-01, while the Rubin GPU has a release date of 2025-12-31. The RTX 5080 Mobile's predecessor is the GeForce 40 Mobile, and the Rubin GPU's predecessor is Server Blackwell.

The Verdict

The data indicates two separate use cases with no overlap in recorded performance. The RTX 5080 Mobile has a full benchmark profile with an average score of 38,349 and an 81st percentile rank. It sits within 0.9 percent of its nearest rivals, confirming that its performance is comparable to other mobile GPUs in the database. The Rubin GPU has no benchmark scores, so its selection cannot be justified on measured results. Instead, its specification sheet shows a compute-oriented design: 28,672 shading units, 896 tensor cores, 288 GB of HBM4 memory, and 22.1 TB/s of bandwidth. The lack of display outputs and API support marks it as a server part, not a client GPU.

For a mobile system, the RTX 5080 Mobile is the only option with recorded data. Its 80 W TDP, IGP slot width, and portable device dependent outputs fit a laptop form factor. The Rubin GPU's 2300 W TDP and SXM Module slot width require a data center environment. The suggested PSU of 2700 W further confirms that it is not intended for end-user desktops or laptops.

The architectural differences reinforce this split. The RTX 5080 Mobile has a higher pixel rate of 144.0 GPixel/s, which suits rasterization workloads where ROP throughput matters. The Rubin GPU has a much higher texture rate of 2,031.2 GTexel/s and FP16 compute of 260.0 TFLOPS, pointing toward compute-heavy tasks. The mobile GPU's RT cores support ray tracing workloads, while the Rubin GPU has no RT core count listed.

Where Each One Wins

The RTX 5080 Mobile wins in several measurable categories. Its pixel rate of 144.0 GPixel/s is more than double the Rubin GPU's 54.41 GPixel/s. Its ROP count of 96 is four times the Rubin GPU's 24. Its base clock of 975 MHz is higher than Rubin's 700 MHz. The mobile GPU also has display outputs and full API support, making it functional for graphics rendering on a portable device. Its average benchmark score of 38,349 and 81st percentile rank place it among the better-performing GPUs in the database, with a delta of only 0.1 percent from the NVIDIA GeForce MX570 and 0.6 percent from the RTX 4080 Mobile.

The Rubin GPU wins in compute-oriented specifications. Its shading unit count of 28,672 is approximately 3.7 times the RTX 5080 Mobile's 7,680. Tensor cores number 896 versus 240. FP32 compute is 130.0 TFLOPS versus 23.04 TFLOPS, and FP16 is 260.0 TFLOPS versus 23.04 TFLOPS. Memory bandwidth is 22.1 TB/s versus 896.0 GB/s, supported by a 16,384-bit bus versus 256-bit. Texture rate is 2,031.2 GTexel/s versus 360.0 GTexel/s. The boost clock of 2267 MHz exceeds the mobile GPU's 1500 MHz, and the process node is smaller at 3 nm versus 5 nm. The transistor count is over seven times higher, and the die size is nearly four times larger.

The use case split is clear from the data. The RTX 5080 Mobile is suited for tasks that rely on pixel throughput, display output, and standard graphics APIs, with a power envelope that fits mobile systems. The Rubin GPU is suited for compute-heavy server workloads that require massive memory capacity, high FP16 throughput, and extreme bandwidth, with no display or API requirements. Benchmarks for the Rubin GPU are absent, so any performance claims for it must rest on specification analysis rather than measured results.