I've been doing a lot of research into positive versus negative air pressure for PC airflow. From what I found, positive air pressure tends to reduce dust accumulation, while negative air pressure can cool down hotspots more effectively. I'm currently 3D printing my own case, which will be wall-mounted, and I'm struggling to decide which airflow setup to choose. My current setup has poor airflow, and I can really feel the heat when playing games like Helldivers. I'm leaning towards negative airflow for better cooling. Has anyone here had experience with similar setups or more recent hardware? Is there a big difference to consider, especially since I'll be avoiding crevices in the printed case? Here are my specs: 5080 FE, Ryzen 9 7900X, 80+ gold 850W PSU, 32GB RAM, and a 1TB SSD.**[NOTE: The printing material will be PETG]**
5 Answers
I've been a fan of negative pressure for decades. It does mean more regular cleaning, but I find it keeps things cooler overall! Just curious if you've tried positive airflow before?
Using your senses alone to gauge heat isn't the best method. Just throwing it out there! But I get why you're asking for opinions on air pressure systems.
Yeah, I just meant it feels really warm. I want to know more about the airflow setups!
Positive air pressure is generally the safer bet. But be careful, just increasing fan count won't guarantee better airflow if they’re in a poorly designed case. For your custom 3D printed case, you can easily direct air intake to the hottest spots. There's really no need to force a negative pressure unless space is super tight. If you're customizing, think about adding ducts to help channel the airflow directly to your CPU and GPU for better cooling!
That's a good point! Ducts sound like a smart move. So in that case, pressure wouldn't really be a concern, right?
Check out this airflow guide from Noctua. It covers different setups, including tips for fan placement and air pressure. You might find it helpful! Just remember, the effectiveness can depend on your specific case design.
True, it talks more about fan numbers but doesn’t delve deeply into positive vs. negative pressure, right?
If you're mounting it on the wall, I highly recommend considering an open build. The thermal efficiency and low noise are fantastic, plus it's super easy to clean—just blast it with an air duster. Interestingly, I find that my open builds attract dust and pet hair less compared to closed ones.
I thought about it! But I had some specific aesthetics in mind that are holding me back from going fully open.
Nope, I haven't. Just focused on negative for my current setup.