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Does Amd Crossfire Work on Iracing

Answers whether AMD CrossFire works on iRacing and how to fix it fast. For iRacing drivers: disable CrossFire, stop micro‑stutter, and get stable FPS quickly.

Short answer: No — AMD CrossFire is not effectively supported in iRacing and usually causes micro‑stutter or worse frame pacing. You’re in the right place: below is a plain-language explanation and fast steps to fix it.

Quick Answer — does amd crossfire work on iracing

iRacing does not have native multi‑GPU support, and modern AMD CrossFire (multi‑GPU) either won’t help or will introduce frame pacing problems. The practical fix is to run a single, powerful GPU and disable CrossFire for stable lap times and smoother visuals.

What’s really going on

CrossFire is AMD’s older way of using two or more GPUs to render frames. Many games needed explicit support to split work between cards cleanly. iRacing does not provide that explicit multi‑GPU support, and driver-level tricks often cause alternating frames to arrive unevenly. That creates micro‑stutter (short, irregular pauses) and inconsistent inputs — bad for a sim where timing and smooth frame delivery matter more than raw benchmark numbers.

If you’re seeing frame spikes, stuttering, inconsistent telemetry, or weird FPS behavior with CrossFire enabled, that’s the expected symptom.

Step-by-step fix

  1. Open AMD Radeon Software (or your AMD control panel). Find the multi‑GPU / CrossFire setting and switch it OFF.
  2. Reboot your PC to ensure the driver resets and only one GPU is active.
  3. In iRacing, set graphics to a stable target: match your frame limiter to your monitor refresh (or use a conservative limit like 120–240 FPS). Turn VSync on if you prefer tear‑free output, or use a frame limiter + G‑Sync/FreeSync.
  4. Update your AMD drivers to the latest stable release, and update iRacing to the latest build.
  5. Verify only one GPU is used: open Windows Task Manager → Performance or use GPU-Z; ensure the second card is idle. If it’s still active, repeat step 1 or uninstall the secondary GPU from Device Manager temporarily.
  6. Test in a short session: if stutter stops and input feels consistent, you’re done. If not, drop some in‑game settings (shadows, reflections) and re-test.

Extra tips / checklist

  • Always prefer one stronger GPU over two older GPUs for sim racing.
  • For VR: multi‑GPU setups almost never help; run a single GPU for best results.
  • Disable overlays (Discord, OBS, Radeon overlay) during testing to avoid noise.
  • If you need multiple monitors, use Eyefinity or extend desktop — not CrossFire for performance.
  • If you insist on benchmarking CrossFire, expect driver-specific results and inconsistent frame pacing.

FAQs

Q: Will CrossFire ever be supported by iRacing?
A: Unlikely — modern engines require explicit multi‑GPU code (DX12 multi‑adapter) and iRacing hasn’t added that. Driver tricks are unreliable.

Q: Can I use CrossFire for multiple displays only?
A: You can use multiple monitors, but not for performance gains. Use one GPU to drive displays or use Eyefinity; CrossFire for speed is not helpful.

Q: My FPS number is higher with CrossFire enabled — should I keep it?
A: No. Even if average FPS rises, frame pacing and micro‑stutter will ruin the driving experience. Choose smoothness over a misleading FPS stat.

Q: What if I have two identical GPUs and want more power?
A: Sell or repurpose the second card and upgrade to a single better GPU — that’s the most reliable path for iRacing performance.

Wrap-up

CrossFire isn’t a practical solution for iRacing — it causes more problems than it solves. Disable multi‑GPU, run a single solid GPU, update drivers, and match your frame limiter to your monitor for the best, stable driving experience. Try a quick test session after disabling CrossFire to confirm the fix.