Building the Fastest Gaming PC in 2025 with RTX 5090 and Ryzen 9 9950X3D

Built around the RTX 5090 and Ryzen 9 9950X3D, this system delivers unmatched performance and cutting-edge thermal efficiency.

Hardware by RereRara on Oct 19, 2025

Putting together the best gaming PC today means using the fastest CPUs and GPUs available. The goal is to create a system that can easily run AAA games at 4K and also serve as a powerful tool for productivity apps.

The build is based on a new case from Haven, which made the great HS420 chassis last year. The Haven BF360 is the newest model, featuring a whole new look and better performance than its predecessor.

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Build Setup

The Haven BF360 is impressive right away because of how heavy and high-quality it feels. It shares some design elements with the HS420 but makes several changes to improve airflow.

There are two huge 180mm fans behind the front panel, attached with magnets. Each fan is designed to improve airflow. The fan blades fit perfectly into the hub, which helps airflow and keeps temperatures lower, even under heavy load.

Removing the side panel reveals that the inside is very well organized. The BF360 has clearly marked channels for routing cables and passthroughs with rubber grommets and dividers to make cable management easier.

There is room for a 360mm radiator or more 180mm fans at the top. Haven says that to create a directed airflow path toward the CPU cooler, use one front fan as an intake and one rear fan as an exhaust. The built-in fan hub and vibration-dampened drive mounts give it a more high-end feel.

A wider GPU airflow scoop at the bottom helps cool down large modern GPUs. This aligns with the design trends seen in other high-end cases.

The CPU and GPU Combo

It was easy to choose the CPU and GPU for this ultimate build. The RTX 5090, NVIDIA's top-of-the-line card, works with AMD's Ryzen 9 9950X3D processor. The RTX 5090 is the most powerful graphics card on the market.

It beats the 5080 and 4090 in both performance and efficiency. There isn't a direct competitor to AMD that is even close to its level right now.

The 9950X3D is great for multitasking and gaming because it has extra cores that help with tasks like rendering and streaming. The 9800X3D does a little better in some games, but the 9950X3D is better overall because it is more balanced. This makes it perfect for people who want both speed and flexibility.

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Choosing and designing a motherboard

We chose NZXT's N9 X870 motherboard for the build. The system's minimalist look is perfect for this black, stealthy design with extensive heatsink coverage. The board has all the modern features needed for top performance, and it looks great with the Haven BF360 because it is simple and clean.

Choices for Memory and Storage

We chose the Corsair MP700 Pro SE for storage. It is a 4TB Gen5 SSD that can read and write at speeds of up to 14GB/s and 12GB/s, respectively. This makes sure that games and heavy productivity tasks load quickly and run smoothly.

The system has Corsair Dominator Titanium memory, specifically the first-edition kit, which is hard to find. The gold heat spreader, which isn't RGB, gives it a classy look that complements the case's front panel.

The modules are tall, so they won't work with some big air coolers, but they work great and feel great.

RAM and SSD

We started the installation by installing the CPU into the motherboard socket, then the RAM modules. The Dominator Titanium memory is all metal, which gives it a nice weight and feel.

It was easy to install the SSD, but the motherboard didn't have a toolless M.2 mount, which felt like a minor oversight at this price point.

Keeping the 9950X3D cool

We chose NZXT's Kraken Elite 360 liquid cooler to help keep the temperatures down. The pump's large display screen is its most impressive feature. It serves as both a visual centerpiece and a performance monitor.

The cooler has Haven's thick 120mm fans, which create a lot of static pressure and keep things cool. It was easy to put the radiator on top of the BF360 because the bracket could be removed, and the inside was large enough.

The installation was quick and clean because the thermal paste was already on the cooler. It fit perfectly over the AMD posts that were already in place.

Building, Fastest, Gaming PC, 2025, RTX 5090, Ryzen 9 9950X3D, NoobFeed

Power supply and motherboard

We placed the motherboard inside the BF360 after installing the cooler. Installation was easy because the case came with standoffs already in place and screws that were easy to find.

Next, we worked on the power supply, keeping the front-panel cables neat and tidy as we went. The PSU installation was easy, and the grommeted cutouts made it easy to run the cables neatly.

The RTX 5090

The RTX 5090 Founders Edition was the last and most exciting part to install. The build's overall tone was perfectly matched by its sleek, simple design. After removing the PCI slots it didn't need, the GPU fit perfectly into the case, showing it was perfectly aligned with the mounting system.

The build was done and ready for testing once the power cable was plugged in through the back grommet.

Results for Performance and Heat

The finished system performed excellently on all tests. During testing, the CPU and GPU temperatures remained very low. The CPU stayed around 65°C, and the GPU stayed below 60°C during heavy gaming.

The build reached the in-game 300 fps limit in Apex Legends at 4K high settings, and the GPU was only using 60% to 70% of its power, indicating there was still plenty of room to grow. With 4K ultra-high settings, the system averaged 215 fps in F1 2025, demonstrating its stability.

The setup kept 92 fps at 4K high in Doom: The Dark Ages, one of the hardest games, without DLSS or frame generation. This is a great achievement for such a heavy game engine. Finally, Marvel's Rivals averaged 135 fps at 4K high, the best performance across the board.

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Final Thoughts

This build has a lot of raw power, looks great, and is very well-made, making it one of the fastest gaming PCs available today. The Haven BF360 has the best airflow and build quality, and the RTX 5090 and Ryzen 9 9950X3D are the best for gaming and work. This setup sets a new standard for 2025 for anyone who wants to see how far they can go in PC gaming.

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