Corsair 4000d Airflow Measurements 2025 Measurements. When corsair told us their new 4000d case came in three versions (4000d, 4000d airflow and icue 4000x rgb) we thought ‘wow, that's sounds like a lot of. The 4000d airflow results are good for both the cpu and gpu;
This means that a case can fit up to: For both measurements the result is a tad better than our open test bench result, demonstrating good effectiveness of the airguide.