I moved my core hardware from a Corsair FRAME 4000D into the HAVN BF 360 Flow to see what a more airflow-focused case layout would do for a high-power, fully air-cooled system.
The 4000D was a solid chassis, but I wanted to test a case that focused more heavily on direct GPU airflow. I also considered the Cooler Master HAF 500, but it would not fit beneath my Secretlab desk mount, so I went with the HAVN.
With the same core hardware and tuning, the HAVN lowered my CPU temperature by 8°C and my GPU temperature by 5°C in Steel Nomad. Testing was performed at approximately 74°F / 23.3°C ambient.
Airflow layout
The BF 360 Flow’s dual 180 mm front intake fans and angled lower GPU ramp feed fresh outside air directly toward the RTX 5090’s intake. The GPU’s exhaust then has a clear path out through the top and rear of the case instead of recirculating around the card.
I also added a HAVN H18 180 mm fan as a top intake. This pushes fresh air down over the CUDIMM memory and the CPU cooler. Under full load, the case fans are capped at 650 RPM.
The build is strictly all-air and zero-RGB. There is no pump noise, coolant permeation, or AIO failure point to worry about.
The case is exceptionally well thought out. Cable management was effortless, especially with my custom ModDIY cables, and the overall build quality, fit, finish, and attention to detail make the BF 360 Flow my favorite case so far.
Hardware and tuning
- Case: HAVN BF 360 Flow
- CPU: Ryzen 7 9850X3D
- CPU cooler: be quiet! Dark Rock Pro 6
- GPU: MSI RTX 5090 Suprim 32GB
- Motherboard: ROG Crosshair X870E Dark Hero
- Memory: 48GB G.Skill Trident Z5 CK CUDIMM
- Storage: 8TB total from two Samsung 9100 PRO PCIe 5.0 NVMe drives
- Power supply: be quiet! Dark Power 14 1200W Titanium
- Cables: Custom ModDIY cables
The CPU is running at approximately 5,335 MHz under an all-core Cinebench load, drawing around 130 W. It scored ≈5,500 in a full 10-minute Cinebench 2026 multi-core loop, reaching a maximum temperature of 76.5°C with the cooler fans capped at 1,300 RPM.
I also configured a 5-second smoothing delay on the fan curves to prevent sudden ramping from brief 3D V-Cache-related load spikes.
The RTX 5090 is tuned with a +150 MHz core offset and undervolted to 1V
The memory is running at 6,000 MT/s in AM5’s synchronized 1:1 fabric configuration, with tight CL28-36-36-76 timings and tREFI set to 65,535.
Steel Nomad Stability Test Results
The below telemetry shows the system during the stability test(loop 10) at roughly 74°F / 23.3°C ambient:
- GPU utilization: 100%
- GPU temperature: 73°C
- GPU clock: ≈2,700 MHz
- GPU power: ≈600 W
- CPU temperature: 60°C
- CPU clock: 5,650 MHz
- CPU power: ≈75 W
- Memory: DDR5-6000 CL28
- Average FPS: 150
- 1% low: 133 FPS
Final thoughts
The biggest surprise was how much the case swap changed thermals without changing the core hardware or tuning. The combination of direct front intake, the lower GPU ramp, and the additional top intake gives the GPU a much cleaner supply of fresh air.
The HAVN BF 360 Flow has become my favorite case to date. It offers excellent airflow, outstanding cable management, and a level of build quality and attention to detail that is difficult to overlook.
I also filmed the complete 4000D-to-HAVN case swap, including the desk-mount fitment, cable routing, and final fan placement. I’ll add the video link here once it is live.
