Building a true 4K gaming rig in 2026 doesn’t have to drain your wallet. Thanks to Seasonic’s sponsorship, we’re showing how a carefully chosen parts list can stay under the $2,000 mark while still delivering smooth, high‑resolution gameplay. This classic LTT Build Guide walks you through each component, the reasoning behind the picks, and the steps to get everything up and running.
Parts Overview
- CPU: Intel Core Ultra 5 250KF Plus – 4.2 GHz, 18‑core
- Motherboard: ASRock B860M Pro‑A Micro ATX, LGA1851
- Memory: Corsair Vengeance 32 GB (2×16) DDR5‑6000 CL36
- Storage: Patriot P300 1 TB M.2‑2280 PCIe 3.0 x4 NVMe SSD
- CPU Cooler: Thermalright Assassin X120 Refined SE
- GPU: ASUS PRIME OC GeForce RTX 5070 Ti, 16 GB GDDR6
- Case: Gamdias ATHENA M4M
- Power Supply: Seasonic FOCUS GX‑850, 80+ Gold
Build Walkthrough
The video breaks the assembly into clear chapters, making it easy to follow even if you’re new to PC building.
- Intro – why a 4K build under $2k is still viable
- CPU choice – balancing core count and clock speed for gaming
- Motherboard selection – features and compatibility notes
- Safety first! – precautions before touching components
- Installing the CPU – aligning the LGA1851 socket
- M.2 SSD choice and installation – securing the Patriot P300
- What RAM? – why DDR5‑6000 CL36 hits the sweet spot
- Shahrad’s law of RAM installation – dual‑channel tips
- CPU cooler – mounting the Thermalright Assassin X120
- Applying the thermal paste – pea‑size method
- PC case – preparing the Gamdias ATHENA M4M
- Linus Drop Tips – cable management tricks
- Installing the motherboard in the case – standoffs and I/O shield
- Case and front‑panel cables – connecting power switch, USB, audio
- Seasonic Focus GX‑850 PSU – wiring and modular benefits
- GPU – seating the RTX 5070 Ti and securing power connectors
- First boot – BIOS check and XMP enable
- Game tests – Clair Obscur: Expedition 33, Cyberpunk 2077, Forza Horizon 5, Tape to Tape
- Final thoughts – performance recap and upgrade paths
The real win is balancing a strong mid‑tier CPU with a capable RTX 5070 Ti so you can push 4K settings without constantly chasing the next expensive upgrade.
Performance Highlights
After the build was complete, we ran a few modern titles at 4K with a mix of high and ultra settings. The results were encouraging:
- Clair Obscur: Expedition 33 – steady 55‑60 fps, occasional dips into the low 50s during heavy crowds
- Cyberpunk 2077 – 45‑50 fps with ray tracing set to medium, DLSS Quality enabled
- Forza Horizon 5 – locked 60 fps at ultra, showcasing the GPU’s rasterization strength
- Tape to Tape – smooth 70 fps+, demonstrating that less demanding titles benefit from the high‑refresh potential of the platform
Final Thoughts
Putting together a 4K‑capable PC for under $2,000 in 2026 is absolutely doable when you prioritize value‑driven parts and pay attention to compatibility. The Seasonic FOCUS GX‑850 provides reliable power, the Intel Ultra 5 offers enough threads for both gaming and light productivity, and the RTX 5070 Ti delivers the graphics horsepower needed for today’s demanding titles. If you ever want to push further, the platform leaves room for a faster SSD, additional RAM, or a later GPU upgrade—all without needing a complete rebuild.
