NVIDIA GeForce RTX 3080 Ti vs NVIDIA GeForce RTX 5080 Mobile Comparison

Head-to-Head Benchmarks

The benchmark results paint a surprisingly balanced picture between the desktop-class NVIDIA GeForce RTX 3080 Ti and the mobile-focused NVIDIA GeForce RTX 5080 Mobile, with each card claiming exactly five wins across the ten tested workloads. However, the margins of victory tell a more nuanced story than the raw win count suggests.

The RTX 3080 Ti's most decisive triumph comes in the Passmark GPU Compute test, where it scores 15,282 against the RTX 5080 Mobile's 12,134 — a commanding 25.9% advantage. This is the largest delta in the entire comparison and highlights the older card's raw computational throughput. The GeForce 30-series card also demonstrates significant strength in the Geekbench Vulkan benchmark, posting 192,697 points versus 169,754, a 13.5% lead that reflects well on its driver maturity and architectural efficiency in Vulkan workloads.

The desktop card's other wins are narrower but consistent. In 3DMark Steel Nomad DX12, the RTX 3080 Ti scores 5,077 against 4,952, a 2.5% margin. Geekbench OpenCL shows a similar pattern at 170,037 versus 166,986, good for a 1.8% edge. The Passmark DirectX 10 test rounds out its victories with a 7.6% lead (184 versus 171). Notably, the RTX 3080 Ti's wins cluster in compute-heavy and modern API workloads, suggesting its larger buffer of shading units and higher clock speeds translate into sustained throughput advantages.

The RTX 5080 Mobile, meanwhile, fights back in legacy and general-purpose benchmarks. Its largest victory comes in Passmark DirectX 9, where it scores 314 versus 274 — a 12.7% margin that indicates better optimization for older rendering paths. The mobile card also takes Passmark DirectX 11 by an 11.9% margin (253 versus 223), and DirectX 12 by 5.2% (116 versus 110). The Passmark G3D score favors the RTX 5080 Mobile at 27,711 versus 26,896, a 2.9% edge, while the G2D test is essentially a tie at 1,095 versus 1,091, a 0.4% difference.

In absolute terms, the aggregate benchmark scores reflect this near-parity. The RTX 3080 Ti averages 41,187 across all tests, placing it at the 83rd percentile of all GPUs, while the RTX 5080 Mobile averages 38,349, sitting at the 81st percentile. The head-to-head results show a split decision, but the compute-heavy workloads where the desktop card excels are arguably more demanding of GPU architecture.

The Verdict

The data does not crown a single winner; it identifies two distinct strengths. The NVIDIA GeForce RTX 3080 Ti is the choice for users prioritizing raw compute throughput and modern API performance. Its 25.9% lead in GPU compute and 13.5% lead in Vulkan are the kind of margins that matter for rendering, scientific workloads, and compute-accelerated tasks. The card's 34.10 TFLOPS FP32 performance, powered by 10,240 shading units, gives it a structural advantage that benchmarks consistently confirm.

The NVIDIA GeForce RTX 5080 Mobile, on the other hand, wins the everyday graphics race. Its Passmark G3D score of 27,711 indicates stronger general 3D rendering performance, and its wins across DirectX 9, 11, and 12 suggest better compatibility and efficiency across a broader range of game titles and graphics APIs. For a laptop part with an 80 W TDP, it delivers competitive frame rates while consuming a fraction of the power of the 350 W desktop card.

The closest rivals in the database reinforce these profiles. The RTX 3080 Ti sits just 0.8% above the AMD Radeon Pro 5300 in aggregate score and 2% above the NVIDIA GeForce RTX 5070, while the RTX 5080 Mobile's nearest competitor is the NVIDIA GeForce MX570 at a 0.1% gap, followed by the RTX 4080 Mobile at 0.6%. These tight margins suggest both cards are well-positioned within their respective performance tiers.

Where Each One Wins

The RTX 3080 Ti dominates in scenarios that stress raw computational resources. Its Passmark GPU Compute victory by 25.9% makes it the clear pick for GPU-accelerated applications like video encoding, scientific simulation, and machine learning inference. The 13.5% Vulkan advantage further cements its status for developers and users running Vulkan-based renderers or modern game engines that leverage this API. The card's 12 GB of GDDR6X memory on a 384-bit bus delivers 912.4 GB/s of bandwidth, which supports its compute-heavy workload profile.

The RTX 5080 Mobile excels in more traditional gaming and legacy compatibility. Its DirectX 9 win by 12.7% and DirectX 11 win by 11.9% show that it handles older titles and established engines with greater efficiency. The Passmark G3D score, which is often used as a proxy for general 3D gaming performance, favors the mobile card by 2.9%, making it the better choice for a broad game library spanning multiple generations. Its 16 GB of GDDR7 memory provides twice the capacity of many rivals, even if its 256-bit bus limits bandwidth to 896.0 GB/s — a figure only 1.8% below the desktop card's.

For users who prioritize portability, the RTX 5080 Mobile's 80 W TDP versus the 350 W TDP of the RTX 3080 Ti represents a fundamental design difference. The desktop card requires a 750 W suggested PSU and a dual-slot cooler, while the mobile part is integrated into the system with no external power connectors. These are not directly comparable products; they are solutions for different use cases that happen to land in similar benchmark territory.

FAQ

Q: Which card has a higher average benchmark score?

A: The NVIDIA GeForce RTX 3080 Ti averages 41,187 across all benchmarks, placing it at the 83rd percentile of all GPUs, while the NVIDIA GeForce RTX 5080 Mobile averages 38,349 at the 81st percentile.

Q: What is the largest performance gap between the two cards?

A: The biggest delta is in Passmark GPU Compute, where the RTX 3080 Ti leads by 25.9%, scoring 15,282 versus 12,134.

Q: How much memory does each card have, and what type?

A: The RTX 3080 Ti has 12 GB of GDDR6X memory, while the RTX 5080 Mobile has 16 GB of GDDR7 memory.

Q: Which card performs better in DirectX 11 benchmarks?

A: The RTX 5080 Mobile wins Passmark DirectX 11 with a score of 253 versus 223, an 11.9% advantage.

Q: What is the power consumption difference?

A: The RTX 3080 Ti has a 350 W TDP, while the RTX 5080 Mobile has an 80 W TDP.

Q: Are the two cards in the same performance tier according to the database?

A: Yes, they are close; the RTX 3080 Ti's nearest rival is the RTX 5070 at a 2% delta, while the RTX 5080 Mobile's nearest rival is the MX570 at a 0.1% delta.

Architecture Differences

The two cards represent fundamentally different architectural generations and design philosophies. The RTX 3080 Ti is built on NVIDIA's Ampere architecture using the GA102 chip, fabricated on Samsung's 8 nm process. This is a massive die at 628 mm², housing 28,300 million transistors at a density of 45.1 million per square millimeter. The RTX 5080 Mobile, by contrast, uses the Blackwell 2.0 architecture with the GB203 chip, manufactured by TSMC on a 5 nm process. Its die is smaller at 378 mm² but packs 45,600 million transistors, achieving a density of 120.6 million per square millimeter — more than 2.5 times the density of the older chip.

The compute resources differ significantly. The RTX 3080 Ti fields 10,240 shading units, 320 TMUs, and 112 ROPs, along with 80 RT cores and 320 tensor cores. The RTX 5080 Mobile has fewer of each: 7,680 shading units, 240 TMUs, 96 ROPs, 60 RT cores, and 240 tensor cores. Despite this reduction, the newer architecture delivers comparable performance per watt, evidenced by the benchmark parity. The clock speeds tell part of the story: the RTX 3080 Ti runs at a 1,365 MHz base and 1,665 MHz boost, while the RTX 5080 Mobile operates at a lower 975 MHz base and 1,500 MHz boost.

Memory configurations also diverge. The RTX 3080 Ti uses 12 GB of GDDR6X on a 384-bit bus, achieving 912.4 GB/s bandwidth, while the RTX 5080 Mobile uses 16 GB of GDDR7 on a 256-bit bus, with 896.0 GB/s bandwidth. The mobile card's newer memory type nearly compensates for the narrower bus. The desktop card offers 34.10 TFLOPS FP32 and FP16 performance, while the mobile card delivers 23.04 TFLOPS in both — a 32% reduction that the benchmarks show does not translate directly to performance losses across all workloads.

The platform requirements are starkly different. The RTX 3080 Ti is a dual-slot card requiring a 1x 12-pin power connector, a 750 W suggested PSU, and PCIe 4.0 x16 interface. The RTX 5080 Mobile is an integrated graphics processor with no power connectors, no slot dimensions, and a PCIe 5.0 x16 interface. Display outputs also differ: the desktop card offers 1x HDMI 2.1 and 3x DisplayPort 1.4a, while the mobile part's outputs are portable-device dependent. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, but the RTX 3080 Ti targets desktop workstations and high-end gaming rigs, while the RTX 5080 Mobile serves laptops where power efficiency is paramount. The RTX 3080 Ti is end-of-life with a launch MSRP of 1,199 USD, while the RTX 5080 Mobile remains active in production.