ArsenalPC Gigabyte C301 GLASS Ryzen 9 9900X3D RTX 5090 128GB DDR5 2TB NVMe gaming PC

System identity

This is a pre-built gaming desktop assembled around an AMD Ryzen 9 9900X3D 12-core processor running at 4.4GHz and an NVIDIA GeForce RTX 5090 graphics card with 32GB GDDR7 memory. It ships with 128GB DDR5 RAM, a 2TB NVMe SSD, Windows 11 Home and a 240mm liquid cooler inside a Gigabyte C301 glass case. Buyers who need a smaller footprint or a lower-tier GPU should look elsewhere.

Sustained load behaviour

The 1200W power supply and 240mm liquid cooler are sized to support the 12-core CPU and RTX 5090 during extended sessions. Liquid cooling moves heat away from the processor more consistently than air, helping maintain clock speeds when all cores are active. The four memory slots are fully populated with 128GB DDR5, so bandwidth remains stable under heavy multitasking. Systems without adequate coolant capacity or fewer memory channels will throttle sooner.

Compatibility checklist

Verify that your monitor uses a display input supported by the RTX 5090 and that your desk space accommodates a full-tower chassis. The motherboard uses the AM5 socket with four DDR5 slots, all occupied, so future RAM upgrades require module replacement. The 2TB NVMe drive occupies one M.2 slot; additional storage needs a free M.2 or 2.5-inch bay. Buyers who want more storage bays or a different socket should consider other configurations.