Intel ATX12V manual Second optional, fan may be located, in optional venting, area or on topside

ATX12V Power Supply Design Guide

Version 2.0

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Second optional	Optional Venting Area	53 REF
fan may be located
in optional venting
area or on topside.

WIRE HARNESS

11.0 x 5.0 cutouts (4X);

min 6.0 clearance under16 REF cutout from inside top cover.

		150 REF	20.0
		4.0X6
			(2X) See Note 5.
		94.0
	5.0
		Area on top surface
	146.0	inside dotted lines should
Preferred location of		have 60% minimum open
		area for proper venting.
manufacturer label	140 REF		80.0
		Eight rectangular holes
		are for air duct mounting
		to direct airflow across
	5.0	processor heatsink.
			45.0
	8.0	114.0
No. 6-32 UNC-2B THREADED HOLE (4X)		138.0	86 REF

Notes; unless otherwise specified:		See Note 4.	9.0 x 3.2 cutouts (4X);
1. Dimensions are in mm.			min 5.0 clearance under
2. Drawing is not to scale.			cutout from inside top cover.
3. Tolerances:
X +/- 1
X.X +/- 0.5
4. If a wire grill is required	64.0
for acoustics or thermals,			74.0
the grill and screws must
be flush mounted.
5. Bottom side (not pictured)
may be user-accessible in
final system installation.		114.0	6.0
Cover openings as	16.0
necessary to prevent	6.0 (2X)
access to non-SELV
circuitry and to meet product
safety requirements.			psu_duct_mount

Figure 9. Power Supply Dimensions for Chassis That Require Top Venting

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