Display mode
Duct only GPU + fan assembly Cutaway assembly
Full cards are shown with the nominal 267 mm length and your measured 38.4 × 98 mm casing. Vents, fins, plug and cable geometry remain photo-informed approximations. There are no separate green seals: the marked outer and top connector rims have been removed. The lower and inner returns now have ramped undersides; local latch clearance remains. Estimated plug/latch insertion envelopes are clear in CAD; physical fit and airtightness are untested.
Airflow · CFD field
Colour by Speed Total-pressure loss Backflow / recirculation Turbulence k Section planes
Plane position 35 mm
CFD analysis
Loss hotspots · click to fly there
Pressure breakdown along the path · total pressure
Steady RANS field: no fan swirl, no turbulence, no time history. Fin banks (and the bracket grille, when modelled) are porous zones, so particles cross them as a smoothed, superficial-velocity flow, not channel by channel. Fans are pressure boundaries or disks, not rotating blades.
Dimensions · mm
Fan frame 120 × 120 × 25 Duct mounting plate 120 × 120 × 2.4 Fan screw pitch 105 × 105 Chamber depth 62 Fitting collars 12 Collar interior* 38.5 × 98.5 Outlet center pitch 60.96 Print depth · incl. collars 74 Passage blend radius 6–8 Main shell · nominal 1.2 Fan front → card face 87 Splitter nose front edge 0.4 Splitter profile Rounded / cubic Card length · nominal 267 Power opening Open outer/top; latch relief retained Collar wall 1.2
V30 adds a hub fairing to V29: a hollow 1.2 mm shell of revolution on the fan axis, 50.5 mm across where it meets the fan and tapering toward a point 35 mm downstream; the splitter web runs whole through it and carries it, and nothing of it stands in the gap between the two web skins. Behind the fan motor the air has nowhere to come from, so V29 holds a slowly recirculating core there; the fairing fills it. Its inside is open toward the fan and closes as two 44 degree half cones either side of the web, so it prints fan-face down without support. CFD, single fan, same mesh: reverse-flow volume in the hub core 18.0 to 7.5 cm3 (-59%), duct loss 0.229 to 0.223 Pa; flow (9.13 L/s) and peak GPU rise (87.2 K) are unchanged. On a second mesh and with a rounded fan inlet in the model the core reduction holds (52-61%) but the loss change shrinks to almost nothing: a cleaner flow, not a cooling gain. The rim lands on the flat rear face of the fan motor housing: about 52 mm across on a P12 Pro PST CO (measured from a photo against the 105 mm hole spacing, ±1 mm), so the 50.5 mm rim sits about 0.75 mm inside its edge. Everything else is V29. P1S/PETG: 156 min / 72.1 g.
Download V30 STL ↓ 10 mm collar fit gauges ↓ Print & connector fitting notes → Geometry and print checks (JSON) → All releases · both slot layouts → ARCTIC fan drawings & pressure curve ↗