AS-IT Build - Ryzen 9 3900X and RX 5700 XT power for work and play

AS-IT 's used build combines the powerful 12-core Ryzen 9 3900X with RX 5700 XT graphics - a configuration that will remain relevant for 1080p/1440p for a long time. A large amount of RAM(64 GB) and a combination of SSD + HDD make the PC fast for both gaming and work tasks.

Components and features

• CPU: Ryzen 9 3900X (12 cores / 24 threads) - great for gaming and streaming at the same time.
• GPU: AMD Radeon RX 5700 XT 8GB - a strong mid-range/high-end card for 1080p/1440p.
• Motherboard: B450 - reliable, often with a basic set of ports; BIOS update recommended for compatibility.
• RAM: 64 GB DDR4 - overkill for gaming, but useful for video editing, virtualization, and professional tasks.
• Storage: 500GB SSD (system/games) + 1TB HDD (data).
• Power supply: 750W - enough even for an upgrade.

Performance - practical FPS performance (1080p / 1440p, medium-high settings)

Test figures are approximate for a good cooling system.

Cyberpunk 2077

• 1080p (High): 52-65 FPS
• 1440p (High): 34-45 FPS

Shadow of the Tomb Raider

• 1080p (Very High): 95-110 FPS
• 1440p (Very High): 60-75 FPS

Fortnite (Epic)

• 1080p: 140-170 FPS
• 1440p: 90-120 FPS

Valorant / CS:GO

• 1080p: 300+ FPS (limited by monitor)

Graph - average FPS for 1080p (textual visualization)

Fortnite | ███████████████████ 155 FPS TombRider | ██████████████ 102 FPS Cyberpunk | ████████ 58 FPS Valorant | █████████████████████████ 300+ FPS  

Comparison with other builds

Against GTX 1660 Super + Ryzen 5 3600: this build wins in multithreaded tasks and in games on high settings; RX 5700 XT gives higher FPS in most modern AAA projects.

Against RTX 3060: The RTX 3060 offers better support for ray tracing and DLSS (if these options are important) - in pure bitmap rendering, the RX 5700 XT competes or slightly inferior depending on the game.

As for upgrades: replacing the GPU with a more modern one (RTX 3060/4060) will give a noticeable increase in tracing or FPS, but will require additional costs.

Advantages and disadvantages of a used build

Pros:

• Excellent CPU/GPU balance for streaming and gaming.
• Large amount of RAM is ideal for professional tasks.
• SSD ensures fast loading of the OS and games.

Cons:

• B450 may require a BIOS update; check for compatibility.
• The RX 5700 XT does not have hardware raytracing like newer cards.
• 64 GB of RAM is too much for a purely gaming PC (but a plus for performance).

Recommendations before buying a used card

• Check the temperatures under load (CPU/GPU).
• Evaluate the condition of the SSD/HDD using S.M.A.R.T. indicators.
• Inspect the power supply (brand/series), test under load - 750W is a good margin, but quality is important.
• Update the BIOS to the latest version for stability with Ryzen 3000.

Conclusion.

AS-IT's used gaming PC with Ryzen 9 3900X and RX 5700 XT is a great option for those who want power for reasonable money. Strong in multi-threaded tasks, excellent in 1080p/1440p gaming and workflows. If you are looking for a machine for streaming, video editing, and modern games, this build will remain relevant for several more years. For those who like tracing or maximum 4K, you should consider upgrading the GPU in the future.