ASUS ROG ASTRAL RTX 5090 OC Edition Overview

When it comes to flagship GPUs, ASUS’ ROG Astral RTX 5090 takes things to an entirely new level – literally, both its price and size. This is a massive graphics card, far larger than NVIDIA’s RTX 5090 Founders Edition, and while its design is undeniably impressive, its sheer size alone is something I cannot fathom. Don’t get me wrong, I love how this card looks, but you’ll need a PC case that can accommodate its length. If you’re considering this GPU for an SFF build, let me stop you right there—it’s not happening.

Given that the ROG Astral RTX 5090 is an OC model with a higher clock speed, it makes sense that it outperforms an RTX 5090 base model – Yes, the performance uplift is there. If you’re chasing the absolute best out-of-the-box performance, this card delivers, but whether that’s worth the added cost is another question.

Quick Look at the Card

The ROG Astral RTX 5090 comes in surprisingly simple packaging—a bit underwhelming, considering its premium price and ROG branding. Given how much this card costs, I expected something more luxurious. That said, the inner box is decent, and ASUS includes a handful of ROG-branded accessories, which should be a nice touch for fans of the brand.

One notable difference from the RTX 50 Series Founders Edition cards is the power adapter situation. While NVIDIA’s FE models come with a new adapter, board partners like ASUS are still using the existing adapter design. We reached out to NVIDIA for clarification on whether this new adapter is exclusive to FE models, but so far, we haven’t received a definitive answer. For now, it seems like the new adapter remains an FE-exclusive feature.

The ROG Astral RTX 5090 is an absolute behemoth of a graphics card, pushing the limits of GPU size to a point that makes even the RTX 4090 look modest. Its bold, angular design is unmistakably ROG, featuring an aggressive shroud, RGB lighting accents, and a reinforced metal backplate for added durability.

While the aesthetics are undeniably impressive, its sheer size makes it an impossible choice for those who are into small form factor (SFF) builds. You’ll need a spacious case to accommodate its massive quadruple-slot cooler, making it a GPU that demands both power and space.

From the side, it’s clear that the ROG Astral RTX 5090 demands a whopping four expansion slots, which is an insane amount of space for a single GPU. This sheer bulk means compatibility with many cases will be a challenge, so checking clearance before buying is a must. On the power side, while NVIDIA recommends a minimum 1000W PSU for the RTX 5090, we strongly suggest going for at least a 1200W unit for better stability and future-proofing, especially if you’re planning to overclock or pair it with a high-end CPU.

For display output, the ROG Astral RTX 5090 sticks to the standard three DisplayPort and one HDMI configuration but goes a step further by adding an extra HDMI port. This small yet thoughtful addition is especially useful for users who rely more on HDMI in multi-monitor setups, making it easier to connect multiple displays without needing adapters or converters.

Test System Setup

Base Performance Tests

Before evaluating DLSS 4, it’s important to examine the RTX 5090’s base rasterization and ray tracing performance without frame generation. This provides a clear comparison of its raw power against the RTX 4090 and helps us understand where the improvements truly matter.

Rasterization Performance (1080P)

At 1080p, the RTX 5090 is heavily CPU-bound, limiting its performance advantage over the RTX 4090. While games like Alan Wake 2 and Cyberpunk 2077 show notable gains, the RTX 4090 occasionally takes the lead in other titles due to CPU bottlenecks.

Rasterization Performance (1440P)

A similar trend continues at 1440p, where the CPU remains a limiting factor, preventing the RTX 5090 from stretching its legs.

Rasterization Performance (4K)

However, once we move up to 4K resolution, the real magic happens—the RTX 5090 consistently outperforms the RTX 4090, delivering significant gains across most titles. The only exception? Marvel’s Spider-Man: Miles Morales, where performance parity suggests an optimization issue rather than a hardware limitation.

This solidifies the RTX 5090 as a GPU built for high-resolution gaming, making 4K the sweet spot where its architectural advancements truly shine.

Ray Tracing Performance (1080P)

Ray Tracing Performance (1440P)

Ray Tracing Performance (4K)

The Ray-tracing results largely mirror raster performance as a whole and we’re not surprised at all. At 1080p and 1440p, CPU bottlenecks occasionally allow the RTX 4090 to trade blows with the RTX 5090. But at 4K, the RTX 5090 takes the lead, delivering superior ray-traced visuals in nearly every title tested.

For the ROG Astral RTX 5090, we can see a nice steady lead in the majority of the tests. Given these results, the RTX 5090’s potential is best realized at 4K with maximum settings. If you’re gaming at 1080p or 1440p, this GPU is pretty overkill unless you’re looking for extreme future-proofing, which, frankly, isn’t necessary for most gamers.

Power Draw & Thermals

Given its oversized cooler, you’d expect the ROG Astral RTX 5090 to deliver top-tier thermal performance—and it doesn’t disappoint. In our tests, the GPU peaked at just 73.5°C, while the memory junction temperature reached 82°C. These numbers show that while the cooler might be massive, it’s clearly doing its job of keeping temperatures well under control, even under heavy loads.

Let’s talk power consumption – because this GPU is an absolute power hog. Unlike a base model RTX 5090 that will draw about 650W at peak, the peak power draw of 702W was recorded on the ROG Astral RTX 5090, though it was only for a brief moment. Regardless, you’ll want a high-quality power supply if you plan on running this GPU at its full potential.

Final Thoughts

We all know that the RTX 5090 is already an insanely expensive GPU, and its availability has made it almost impossible to get it at MSRP. But things get even worse with the ROG Astral RTX 5090. With a hefty price tag of RM16,999, plus additional markups from third-party sellers, this card is only for those with deep pockets. It’s undoubtedly a great GPU, but the price makes it inaccessible to most gamers.

The ROG Astral RTX 5090 is a beast of a GPU, delivering top-tier performance with factory-overclocked settings and aggressive cooling solutions. However, its size, power draw, and price make it a hard sell for anyone but the most enthusiastic, deep-pocketed buyers – the hardcore ROG fanboys. If you have the money, the space, and the power supply to support it, this GPU will undoubtedly impress, but for most people, it’s just too much GPU at too high a price.