Best RX 6900 XT Gaming PC Build (Ryzen 5900X + Radeon RX 6900 XT)

Ryzen 9 5900X + Radeon RX 6900 XT Build offers top gaming performance at an affordable price. AMD’s Radeon RX 6900XT, packed with ray tracing and high graphical performance, rivals Nvidia’s RTX 3900 but is more cost-effective. This build, focusing on the RX 6900 XT, is ideal for running new games at 60 FPS in Full HD. It’s an optimal 2021 gaming PC setup, balancing cost and performance, suitable for those looking to build a powerful AMD-based gaming PC.

Let’s discuss the PC components that are essential to building your RX 6900 XT Gaming PC:

Ryzen 9 5900X + Radeon RX 6900 XT Build PC components

CPU – Ryzen 9 5900X Overview

SeriesAMD Ryzen 9 5900X
Item model numberAMD Ryzen 9 5900X
Item Weight2.8 ounces
Product Dimensions1.57 x 1.57 x 0.24 inches
Item Dimensions LxWxH1.57 x 1.57 x 0.24 inches
Processor BrandAMD
Processor Count12
Processor4.8 GHz ryzen_9

The AMD Ryzen 9 5900X, part of the Zen 3 family, is a powerful 12-core processor with 7nm technology and speeds of 3.70 GHz to 4.80 GHz. It’s a top choice for gaming and various workloads, outperforming its predecessors and competing strongly with Intel, especially with its PCIe 4.0 support.

This makes the Ryzen 9 5900X a more feature-rich and future-proof option for gaming PCs.

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  • Amazing performance
  • New champion in single-core performance
  • Same power consumption as before
  • You don’t need a new motherboard
  • The price has gone up
  • No cooler included


In summary, the AMD Ryzen 9 5900X stands out as a top gaming processor with significant single-core performance improvements. It excels in both multithreading and single-threading, maintaining low temperatures and power consumption.

It surpasses most processors, only second to the Ryzen 9 5950X, making it a formidable choice for gamers.

CPU Cooler – Noctua NH-U12A overview

Cpu Cooler Noctua Nh U12a Overview
Item model numberNH-U12A
Item Weight3.74 pounds
Product Dimensions6.69 x 8.46 x 6.5 inches
Item Dimensions LxWxH6.69 x 8.46 x 6.5 inches
Voltage12 Volts

Noctua has revived its NH-U12 cooler series with the NH-U12A, featuring two 120mm NF-A12x25 PWM fans with advanced bearings. This fifth iteration stands out in the middle-segment cooler market. Unlike competitors focusing on larger fans and lighting designs, the NH-U12A prioritizes compatibility and compact size while maintaining high performance.

Noctua NH-U12A, Premium CPU Cooler
  • 140mm class performance in 120mm size: 7 heatpipes, more surface area and a dual fan configuration with...
  • Excellent case, RAM and PCIe compatibility: Fits most tower cases (158mm height), doesn’t overhang the RAM...
  • Quiet, state-of-the-art NF-A12x25 120mm fans with Low-Noise Adaptors and PWM for automatic speed control: Full...
  • Includes high-end NT-H1 thermal paste and SecuFirm2 mounting system for easy installation on Intel LGA1851,...
  • Fans with high-reliability bearings
  • A new single-core champion
  • Low noise and vibration
  • Quite good thermal paste included
  • Easy installation
  • Good performance
  • High-quality performance
  • 6-year warranty
  • Heavyweight
  • Expensive in price
  • Lack of RGB for the gamer crowd


To conclude, we didn’t find any of the best CPU Cooler features, just like Noctua NH-U12A. 

The Noctua NH-U12A cooler comes with a proprietary SecuFirm2 mounting kit, which ensures compatibility with all modern AMD and Intel sockets for desktop processors, including Intel HEDT processors for the LGA 2066; socket. With a small difference in price, many potential buyers will surely wonder which side to choose; a classic air cooler or an affordable maintenance-free liquid cooling system. In the case of the Noctua NH-U12A, the choice is not easy.

Motherboard – Asus ROG Crosshair VIII Hero (WiFi) Overview

Motherboard Asus Rog Crosshair Viii Hero Wifi Overview
Item Weight5.7 pounds
Product Dimensions14.57 x 12.28 x 4.25 inches
Item Dimensions LxWxH14.57 x 12.28 x 4.25 inches
Batteries1 Lithium Metal battery is required. (included)
Processor2133 MHz amd_ryzen_7
Memory Speed2133 MHz
Wireless Type802.11n, 802.11b, 802.11a, 802.11g

The Asus ROG Crosshair VIII Hero WiFi motherboard, designed for enthusiasts, gamers, and overclockers, is compatible with AMD Ryzen 7 and 9 processors. It features a robust design with 16 power phases and a strong BIOS. Its power delivery system is enhanced for the Ryzen 3000 series, making it a top choice in the ASUS X570 series. Available in ATX form factor (305 × 244 mm), it offers variants with and without WiFi, catering to different user needs.

ASUS ROG X570 Crosshair VIII Hero (Wi-Fi) ATX Motherboard with PCIe 4.0, on-Board WiFi 6
  • AMD AM4 socket: ready for 2nd, and 3rd Gen AMD Ryzen processors and up to two M. 2 drives, USB 3. 2 Gen2, and...
  • Comprehensive thermal design: active PCH heatsink, M. 2 aluminum heatsink and ROG cooling zone.
  • High-performance networking: on-board Wi-Fi 6 (802. 11Ax) with MU-MIMO support, 2. 5 Gaps Ethernet and Gigabit...
  • 5-Way Optimization: automated system-wide tuning, providing overclocking and cooling profiles that are tailor...
  • support for AMD Ryzen 2nd and 3rd generation processors;
  • 12 USB ports;
  • Offers AX WiFi and also 2.5GbE LAN
  • integrated thermal design;
  • high-quality sound subsystem;
  • 5-way optimization function;
  • Gbps Ethernet + Gigabit Ethernet with ASUS LANGuard protection;
  • WiFi 6 (802.11ax) module with MU-MIMO support.
  • Very high price
  • Overkill for most
  • Chipset fan sits directly under the GPU


Overall, the Asus ROG Crosshair VIII Hero WiFi is a functional motherboard and a good choice for building computers based on the mid to high-end X570 chipset. The model has 12 USB ports, a high-speed 2.5G Ethernet network port, eight SATA ports, and a WiFi 6 (802.11ax) module with MU-MIMO support.  Of course, a big plus is the PCIe Gen 4.0 bus, which is supported by the X570 platform with the latest Ryzen 3000 processors. Note that the motherboard did not warm up in the VRM zone even under full load, facilitated by the complex thermal design that is active chipset heatsink, ROG cooling zone, and aluminum M.2 heatsink.

Memory – G.Skill Trident Z Neo 32GB overview

Memory G.skill Trident Z Neo 32gb
Slats height44 mm
Form factorDIMM
Guaranteed delays16-16-16-36 @ 3600 MHz
Capacity32 GB (2 x 16 GB)
Base voltage1.2v.

G.Skill’s Trident Z Neo memory sticks, designed for Ryzen processors but also compatible with Intel, offer various options from 16 to 256 GB kits, with speeds from 2.666 to 3.800 MHz. The modules stand out with a striking design, featuring a black and silver heat spreader and LED backlighting. With a height of 44mm, checking CPU cooler compatibility is advised. G.Skill’s range also includes Flare X, Ripjaws, Forties, and SniperX lines.

G.Skill Trident Z NEO Series 64GB (2 x 32GB) 288-Pin SDRAM DDR4-3600
  • Trident Z NEO Series, designed specifically for AMD Ryzen X570 and B550 Series; Intel Z390, Z490 and newer.
  • 64GB kit containing 2 x 32GB modules, DDR4-3600, 288-Pin, CAS Latency CL18 (18-22-22-42) at 1.35V
  • Brand: G.SKILL, Series: Trident Z NEO, Model: F4-3600C18D-64GTZN
  • ECC: No, Dual Channel Kit, Recommended Use: High Performance or Gaming Memory
  • Works at the stated frequency and even more.
  • Excellent acceleration potential.
  • Spectacular RGB illumination.
  • The guarantee is stated to be lifelong
  • High price
  • Pretty high radiators in 44m.


To conclude, G.Skill continues to delight enthusiasts with its products, and it is rightfully considered one of the best manufacturers of memory for overclocking. The reviewed memory kit F4-3600C16D-16GTZN of the new Trident Z Neo series boasts an updated design and good characteristics that are inaccessible to many competitors on the market. Any processor will unlock its great potential, be it Intel or AMD, although positioned for use on the AM4 platform with the third generation Ryzen.

Storage – 2TB Samsung 970 EVO Plus overview: 

Storage 2tb Samsung 970 Evo
Storage shock resistance1500 G
ControllerSamsung Phoenix
Form factorPCI-E
Volume2 TB
Read speed3300 MB
ConnectionPCI-E 3.0 x4
Maximum working temperature70 °C

Samsung’s new EVO Plus series enhances its mainstream SSD lineup, boasting up to 53% better performance than the 970 EVO. Approaching third-generation PCI Express limits, it features advanced 3-bit MLC V-NAND memory and an upgraded Phoenix controller. Instead of renaming it to 980, Samsung added “Plus” to emphasize the performance leap, positioning the EVO Plus as a leader until the next-gen PCIe standard.

SAMSUNG 970 EVO Plus SSD 2TB - M.2 NVMe Interface Internal Solid State
54,253 Reviews
SAMSUNG 970 EVO Plus SSD 2TB - M.2 NVMe Interface Internal Solid State
  • Always Evolving SSD: The 970 EVO Plus is powered by the latest V-NAND technology and firmware optimization,...
  • Breakthrough Read/Write Speeds: The 970 EVO Plus reaches sequential read/write speeds up to 3,500/3,300 MB/s,...
  • Samsung Magician for Data Security: This software provides a suite of user-friendly tools that help you keep...
  • Superior Heat Dissipation: Samsung’s Dynamic Thermal Guard automatically monitors and maintains optimal...
  • Solid overall performance
  • Solid endurance
  • Five-year warranty
  • Write performance drop is mild compared to that of other TLC drives
  • Easy to use with lots of features
  • Low latency
  • Could use further efficiency optimization
  • Write performance drops in half once a small buffer is filled
  • Price premium


The Samsung SSD 970 Evo Plus 1TB features a new 96-layer TLC 3D V-NAND, upgrading from the 64-layer in the 970 EVO. This advancement, combined with firmware optimizations, results in a 57% increase in random write performance over the 970 EVO. Utilizing SLC caching, the 970 EVO Plus surpasses the speed of the 970 PRO and competes strongly with other manufacturers’ drives.

PC Case – Be quiet! Dark Base 700 overview

Pc Case Be Quiet Dark Base 700 Overview
Dimensions241 x 519 x 544 mm (W x W x D)
Weight13.25 kg
Max graphics card length286/430mm (w/o HDD cage)
Max cooler height180mm
Fan speed controller6x 4-pin, Step Controller, PWM hub
Motherboard supportE-ATX (30.5 x 27.5cm), ATX, M-ATX, Mini-ITX

Since 2002, be quiet! has been known for its products aimed at enthusiasts. They entered the case market three and a half years ago, focusing on high standards with three case series. Be quiet! Dark Base 700 is a high-end, silent case with a classic, austere design featuring flat surfaces and rounded corners. It’s predominantly black, with hints of future color variants. The case has limited external USB ports but includes a Type-C connector. It lacks front-panel 3.5- and 5.25-inch slots, addressing a dwindling but still present demand. The design incorporates tinted glass on one side, steel on the other, and anodized aluminum accents on the front and top.

PC Case - Be quiet! Dark Base 700
  • Motherboard tray and HDD slots with enhanced possibilities for individual requirements
  • Two be quiet! Silent Wings 3 140mm PWM fans
  • 4-Step dual-rail fan controller is switchable between silence and performance mode
  • Ready for radiators up to 360mm
  • Excellent build quality
  • Reverse ATX capable
  • Built-in fan controller
  • Tempered glass side panel
  • LED lighting
  • USB 3.1 on the front I/O
  • Only two 140mm fans
  • Fingerprint magnet
  • A bit expensive
  • Not effective cable routing
  • Only three 3.5″ hard-drive cages


The Be quiet! Dark Base 700’s classification as a high-end case is well-justified. Its design and construction are well-executed with few criticisms. However, its potential to house up to 17 drives is limited in practice, as it requires additional containers not readily available in retail. Nevertheless, the nine available drive slots should suffice for most configurations.

Power Supply – Corsair AX1000 80+ Titanium overview

Corsair Ax Series
Max. DC Output1000 W
Efficiency 80 PLUS Titanium
Total power1000 watts
Fan 135 mm
Operating Temperature0 °C – 50 °C
Dimensions152 mm (W) x 87 mm (H) x 172 mm (D)
Weight2.06 kg

Corsair has updated its flagship PSU series with two models, the AX850 and AX1000. New items should be perceived precisely as an extension of existing power supply units, although they have several differences from other products in the series. First of all, there is a noticeable lack of a USB interface to ensure compatibility with Corsair software. Another highlight is the collaboration with another manufacturing partner, Seasonic, on new models.

At CES 2019, Corsair introduced an updated AX PSU line, emphasizing efficiency with an 80 PLUS Titanium rating. The new AX Series Titanium includes 850W and 1000W models, designed more for workstations than gaming or home computers.

Power Supply - Corsair AX1000 80+ Titanium
  • 80+ Titanium Certified for the highest level of efficiency and performance
  • Zero RPM fan mode for near-silent operation at low to medium loads
  • World Class electrical performance for incredibly stable voltages and ultra-low ripple noise
  • 135mm cooling fan with true FDB Bearing delivers Low-Noise operation even at demanding loads
  • 80 PLUS Titanium efficiency
  • High performance
  • Silent operation
  • Fully modular
  • Topnotch build quality
  • 8x PCIe & 2x EPS connectors
  • Ten-year warranty
  • In-line caps feature of cables
  • EPS connectors unable to use 16AWG gauges
  • The short distance between peripheral connectors


The Corsair AX1000 PSU stands out for its minimalist, practical design, catering to a premium segment with its high performance and quality. It earns an Editorial Award for its original design and superior consumer qualities. Key features include a semi-passive fan, fully modular cabling, and exceptional equipment.

Wrapping up

Ryzen 9 5900X + Radeon RX 6900 XT build a great choice for gamers and enjoy the best PC enthusiasts. Paired with the latest AMD Ryzen Vermeer series processors, the RX 6900 XT makes a great combination with Ryzen 9 5900X that provides the best user experience.

Many CPUs from AMD and Intel work well with the AMD Radeon RX 6900 XT. However, we must recommend the AMD range as the two components can better communicate with each other for better performance. So, if you want to build your customized PC, then the above suggestion is the perfect option for you because of the combination of Ryzen 9 5900X and Radeon RX 6900 XT components. 

About denis

Denis, aka "The PC Wizard", is a self-proclaimed computer whisperer. When he's not busy herding motherboards or taming rebellious RAM, he loves to write in-depth articles about PC components and building. He claims that the secret to his technical prowess lies in the number of caffeinated beverages he consumes daily. If you've ever wondered who to call when your computer throws a tantrum, look no further than Denis – our very own tech-sorcerer.

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