Testing the Old X99 I7-6850K vs Ryzen 7 9800X3D.

Tech YES City
Tech YES CityMar 28, 2026

Why It Matters

Understanding legacy platform limits helps budget builders avoid costly incompatibilities and informs decisions on whether to invest in older DDR4 rigs or transition to newer, supported hardware.

Key Takeaways

  • Used X99 platform offers cheap CPU but limited GPU compatibility
  • i7-6850K struggles against Ryzen 7 9800X3D at 1080p
  • RTX 5060 Ti fails on flagship X99 board without BIOS update
  • Mid‑range X99 board runs RTX 3060 flawlessly after BIOS refresh
  • Older DDR4 rigs remain viable for optimized games despite DDR5 costs

Summary

The video examines a budget‑focused build using an X99 platform paired with an i7‑6850K Broadwell CPU, comparing its performance to a modern Ryzen 7 9800X3D system. The creator sourced the CPU, motherboard, and DDR4 RAM for roughly AUD 100, highlighting the allure of cheap, used components but also exposing the challenges of legacy hardware compatibility. Key insights include the i7‑6850K’s modest 5% IPC gain over Haswell, its underwhelming overclocking headroom, and the critical BIOS limitation that prevents an RTX 5060 Ti from initializing on a high‑end X99 board. A mid‑range X99 board, after a BIOS update, runs an RTX 3060 without issue, underscoring the importance of firmware support. Benchmarking across Arc Raiders, Fortnite, and Counter‑Strike 2 shows the X99 rig trailing the Ryzen system at 1080p, with gaps as wide as three‑fold in CS2, while narrowing at 1440p high settings. Notable examples: the RTX 5060 Ti produced 126 FPS versus 115 FPS on the Ryzen rig in Arc Raiders at 1440p, yet the X99 platform delivered only 253 FPS versus 692 FPS on CS2 at 1080p low settings. The creator also notes that the RTX 5060 Ti simply bricks on the flagship board, whereas the RTX 3060 works flawlessly after a BIOS refresh, illustrating the disparity between flagship and mid‑range X99 boards. The findings suggest that while legacy X99 systems can still deliver respectable performance for optimized titles, they are ill‑suited for newer PCIe Gen 5 GPUs without dedicated BIOS updates. Budget builders should prioritize DDR4‑compatible GPUs or consider modest upgrades, as DDR5 memory remains prohibitively expensive. Ultimately, the video reinforces the value of thorough hardware compatibility checks when hunting for used components.

Original Description

Let's go back to a 6 core that released with not so much of a bang, and that was the i7-6850K, but nowadays it can be had for extremely cheap prices (even cheaper if you buy used).
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Chapters
00:00 The CPU, the deal and broadwell talk.
02:59 RTX 5000 series gives out a weird problem (I guess on only SOME x99 boards?)
04:40 Good News
05:19 Benchmarking 1080p and 1440p, and discussion about X99.
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