GPU clearance for the Corsair iCUE H150i in a Corsair 4000D case

Quick Answer

Corsair 4000D can work with Corsair iCUE H150i, but GPU clearance is only safe after you confirm radiator thickness, 25mm fan depth, tube routing, and GPU length. A 360mm radiator can reduce front or side GPU room, so the safe answer is to measure the radiator stack before choosing a long graphics card. For SA builds, plan around R2,000-R7,500 for the cooling or case side of the decision and check long GPUs such as RTX 5070, RX 9070 XT, or RTX 5080 partner cards in the 300-360mm class before ordering.

Clearance Checks In Millimetres

Measure the case's official maximum GPU length, then subtract the radiator and fan stack if the cooler mounts in front or beside the GPU chamber. A common fan is 25mm thick, while many 360mm radiators sit around 27-38mm before fans. That 52-63mm stack can turn a safe long-card build into a tight one.

If the cooler is a tower air cooler, the key checks shift to CPU cooler height, RAM clearance, and whether the graphics card backplate crowds the cooler fan clips. Do not assume two builds with the same case have the same room if the motherboard slot layout differs.

Practical GPU Shortlist

Use RTX 5070, RX 9070 XT, or RTX 5080 partner cards in the 300-360mm class as length anchors, then check the exact partner model. Two cards with the same chip can differ by 40mm or more because of cooler design. A 1440p 100 fps target does not require the longest flagship cooler if a shorter dual-fan or compact triple-fan model fits cleaner.

SA Buying Notes

South African buyers should confirm the case revision, cooler bracket support, and included mounting hardware before checkout. Keep broad pricing cautious: R2,000-R7,500 is a planning range, not a live quote. Local warranty handling is easier when every part is bought with the exact model name recorded.

FAQ

How much clearance should I leave?

Leave at least 10-20mm of free space beyond the measured GPU length where possible. More space helps airflow and makes cable routing less stressful.

Does a 360mm AIO always block long GPUs?

No. Top, side, and front mounting layouts change the answer. The risk appears when the radiator and fans sit in the same length path as the GPU.

Which spec should I confirm before buying?

Confirm maximum GPU length, radiator position, fan thickness, CPU cooler height, and motherboard slot layout. Those numbers matter more than the case photo.