Hush Wing Store — Quiet PC cooling: 80-140 mm | hushwing-store.com
Four frame sizes cover almost every PC case — 80, 92, 120 and 140 mm, all 25 mm thick — and each has its own mounting-hole spacing.
Frame size is the outside square of the fan. The four standards are 80 × 80 × 25 mm, 92 × 92 × 25 mm, 120 × 120 × 25 mm and 140 × 140 × 25 mm. The 25 mm thickness is shared across the family, so a fan that matches the hole pattern almost always fits the depth as well.
Mounting holes sit on a smaller square than the frame, and this is the measurement that decides fit. On an 80 mm fan the holes are 71.5 mm apart; on a 120 mm fan, 105 mm; on a 140 mm fan, 124.5 mm, with some models at 130 mm. Measure centre-to-centre between two adjacent corner holes, never edge to edge.
On narrow screens, swipe or scroll the plate sideways.
Airflow grows with frame size. A 120 mm fan commonly moves 30–70 CFM (about 51–119 m³/h), while a 140 mm fan moves 50–100 CFM. Because a larger fan can turn slower for the same air, a 140 mm position is usually the quieter option where the case offers both patterns.
The 120 mm size remains the default for quiet builds: it fits nearly every case, its 105 mm hole pattern is effectively universal, and at 600–1,200 RPM it stays in the 18–25 dBA band examined in the noise-levels guide.
Once the size is confirmed, the swap itself is a short screwdriver job — the replacement guide gives the step order — and if a new fan's screws do not seat on the first try, hole spacing is the first thing to re-measure.
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