Introduction

ASUS GeForce RTX 5080 Noctua OC is the third generation of enthusiast-segment graphics cards from the collaboration between ASUS and Noctua. We were blown away by the RTX 3080 Noctua OC, and the two companies only levelled things up with the RTX 4080 Noctua OC, which tremendously raised our expectations for the card we're reviewing today. Noctua is a pioneering brand with ultra-quiet fans that implement hydro-dynamic bearings, and the company constantly innovates new motor, impeller and bearing designs with its main line of case fans that are sold both as standalone units, and included with its class-leading range of CPU coolers. ASUS, on the other hand, is the market leader in custom PCB design for graphics cards, and has a formidable lineup of custom design graphics cards on its own, under its ROG Astral, ROG Strix, and TUF Gaming brands. Thus, the ASUS x Noctua collaboration can only be seen from the lens of an enthusiast-segment product that prioritizes low noise above everything else, without compromising on out-of-the-box performance or overclocking headroom.



The ASUS GeForce RTX 5080 Noctua OC is built upon the foundation of the ROG Astral RTX 5080 OC PCB, with a complete replacement of its cooling solution. Noctua leads the design effort of this cooler, which consists of two sets of aluminium fin-stack heatsinks with an asymmetric arrangement of fins that improves heat dissipation. The heatsink makes contact with the GPU over a vapor chamber plate, and a premium phase-change thermal pad. The real star of the show is the trio of Noctua NF-A12x25 G2 120 mm fans. These are proper retail grade fans that have been integrated into the cooling solution.

Compared to the past two generations, ASUS and Noctua have taken greater care to ensure that the cooler shroud design makes the card appear like a cohesive factory-made product, and not a card with a DIY cooling solution installed by the user. The G2 fan features Noctua's second generation progressive-bend impeller with flow-acceleration channels, winglets, and a unique hub design Noctua calls centralized turbulator. The impeller is made of Sterrox liquid-crystal polymer. The fan also comes with Noctua's SSO2 hydro-dynamic bearing. The cooler has been extensively tested by Noctua to ensure the lowest possible noise levels from an air-cooled RTX 5080, lower than even a DIY liquid cooling setup that includes pump noise.

The GeForce RTX 5080 is an enthusiast-segment graphics card from NVIDIA that's second only to the flagship RTX 5090. It is designed for maxed out gameplay at 4K Ultra HD resolution, including ray tracing. It is powered by the latest Blackwell graphics architecture, which introduces new technologies such as Neural Rendering—the ability to combine photorealistic objects created by generative AI models into raster graphics—ray tracing with Mega Geometry, and the new DLSS 4 feature-set, which introduces Transformer-based AI models that are more accurate and significantly improve image quality at every performance preset. NVIDIA also introduced the Blackwell-exclusive Multi Frame Generation feature, which lets the GPU draw up to three frames following every conventionally rendered one, to effectively quadruple frame-rates.

The GeForce RTX 5080 is based on the GB203 silicon, which it maxes out, enabling all 84 SM physically present on the chip, to enjoy 10,752 CUDA cores, 336 Tensor cores, 84 RT cores, 336 TMUs, and 112 ROPs. You get 16 GB of 30 Gbps GDDR7 memory across the chip's full 256-bit wide memory bus, for 960 GB/s of memory bandwidth. Besides GDDR7, the other new standards Blackwell implements are a PCI-Express 5.0 host interface, and ATX 3.1 with PCIe 5.1 CEM power architecture. The power input is the more durable 12V-2x6, an evolution of the 12VHPWR connector.

ASUS has given the RTX 5080 Noctua OC factory overclocked speeds of 2700 MHz boost compared to 2617 MHz, which is halfway between those of the ROG Astral RTX 5080, and the ROG Astral RTX 5080 OC Edition. The company is pricing the card at around $1500, which is a steep premium, but what's on offer are noise levels that beat even liquid cooling solutions.