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Thermals & Acoustics

38 Thin Mini-ITX Based PC System Design Guide

Figure 4-1. Example of Voltage Regulator Induced Throttling

Some voltage regulator designs will bypass a square wave output and will drop the

power down to a constant level, such as 35W. In either case, the CPU DTS values will

not be near the die’s maximum temperature of DTS = -1. This is because the CPU die

is not the component that is over temp.

Figure 4-2. Example of a Typical CPU DTS Readout When Not Throttling

Table of Contents3
Introduction8
Purpose / Scope8
Overview8
All in One Pcs9
Figure 1-1. Thin Mini-ITX Applications9
Tiny Pcs10
Table 1-1. Common AIO Features in Thin Mini-ITX Based AIO Pcs10
Terminology11
Figure 1-2. Mini-ITX (Left) Vs Thin Mini-ITX (Right)11
Table 1-2. Terms and Descriptions11
Reference Documents12
Table 1-3. Reference Documents12
Thin Mini-ITX Internal Electrical Interfaces13
Common Connector List13
Table 2-1. Internal Motherboard Connectors13
Flat Panel Display14
Lvds14
Figure 2-1. 40-Pin LVDS Header15
Table 2-2. 40-Pin LVDS Header Pin-Out15
Edp (VESA Embedded Display Port™)17
Figure 2-2. 40-Pin Edp MB Header17
Table 2-3. 40-Pin Edp Header Pin-Out18
Flat Panel Display Brightness19
Figure 2-3. PC & Software Brightness Control19
Figure 2-4. FPD Brightness Header19
Table 2-4. 8-Pin FPD Brightness Header Pin-Out19
On Screen Display (OSD)20
Audio21
Front Panel Audio21
Figure 2-5. Front Panel Audio Header21
Table 2-5. Passive AC'97 Front Panel Audio Header Pin-Out21
Table 2-6. HD Audio Front Panel Audio Header Pin-Out21
Internal Stereo Speakers22
Figure 2-6. Internal Stereo Speakers Header22
Digital Microphone23
Figure 2-7. DMIC MB Header23
Table 2-7. Internal Stereo Speakers Header Pin-Out23
Table 2-8. DMIC Header Pin-Out23
Sata24
Internal USB24
Front Panel Dual USB 2.0 Header24
Figure 2-8. 2X5 USB 2.0 Header (Keyed at Pin 9)24
Table 2-9. 2X5 USB 2.0 Header (Keyed at Pin 9) Pin-Out24
Internal Dual USB 2.0 Header25
Figure 2-9. 2X5 USB 2.0 Header (Keyed at Pins 9 and 10)25
Table 2-10. 2X5 USB 2.0 Header (Keyed at Pins 9 and 10) Pin-Out25
Internal Single USB 2.0 Header26
Internal USB 3.0 Header26
Figure 2-10. 1X5 USB 2.0 Header26
Figure 2-11. 2X10 USB 3.0 Header26
Table 2-11. 1X5 USB 2.0 Header Pin-Out26
Table 2-12. 2X10 USB 3.0 Header Pin-Out27
Front Panel (Buttons, Leds)28
Figure 2-12. USB 3.0 Header Orientation28
Figure 2-13. Front Panel Main Header28
Internal Power Input29
Figure 2-14. Internal Power Header29
Table 2-13. Front Panel Main Header Pin-Out29
Table 2-14. Internal Power Header Pin-Out30
Fans31
CPU Fan31
System Fan31
Figure 2-15. 4-Pin CPU Fan Header31
Consumer Infrared Receiver32
Wireless Bluetooth32
Monitor Switch32
Figure 2-16. CIR Receiver Header32
Figure 2-17. Monitor Switch Header32
Table 2-15. Monitor Switch Header Pin-Out33
Power Supply34
External AC Adapter34
External Power Connector for Socketed CPU Based Systems34
Figure 3-1. External Power Connector for Socketed CPU Based Systems35
Thermals & Acoustics36
General Thermal-Acoustics Considerations36
Blowers37
Fan Speed Control and CPU Throttling37
Figure 4-1. Example of Voltage Regulator Induced Throttling38
Figure 4-2. Example of a Typical CPU DTS Readout When Not Throttling38
Figure 4-3. CPU die Temperature Induced Throttling39
Vent Free Area Ratio40
Dust Considerations40
Environmental and Skin Temperature Limit Recommendations40
Motherboard Component Cooling40
Memory Cooling40
Table 4-1. Environmental and Skin Temperature Limit Recommendations40
Platform Controller Hub (PCH) Cooling41
Voltage Regulator Cooling41
Figure 4-4. Air Temperature Increase Across Memory41
Acoustics42
Figure 4-5. ECMA-74 Extract - Figure C.4C42
Figure 4-6. ECMA-74 Extract - Figure C.4D43
Figure 4-7. ECMA-74 Extract - Figure C.4A43
Mechanical44
CPU Mechanicals44
Figure 5-1. CPU Location and Additional Keep in Zones44
Internal Motherboard Header Locations45
Figure 5-2. Header Zones45
System Cables and Connectors46
System Cable Kitting46
CPU Thermal Solution and System Fan Mechanical Interface46
Figure 5-3. Blower and Heat Exchanger Retention Locations for Two Blower47
Figure 5-4. Blower and Heat Exchanger Retention Locations for Two Blower Configuration Option 248
Figure 5-5. Blower and Heat Exchanger Retention Locations for a Single Blower49
Thin Mini-ITX I/O Shield50
Figure 5-6. Minimum Blower Gap50
Industrial Design, System Layout, and Usability Considerations51
Figure 5-7. Example Thin Mini-ITX I/O Shield51
AIO Specific System Mechanicals52
Low Profile Reference Heat Pipe Thermal Solution53
General Volumetrics / Requirements53
Reference Design CPU Thermal Solution53
Figure 6-1. Reference Side and Top View Dimensions for Low Profile Reference Thermal Solution54
Figure 6-2. Reference Blower Mounting Flange Standoff Height as Measured from the54
Bottom of the Flange54
Reference System Layouts55
Thin Mini ITX Based System Design55
General System Design Considerations55
Reference Core Components Layouts56
Figure 7-1. Core Component Layout - Example a56
Figure 7-2. Core Component Layout - Example B57
Figure 7-3. Core Component Layout - Example C58
Figure 7-4. Core Component Layout - Example D59
Figure 7-5. Core Component Layout - Example E60
Figure 7-6. Core Component Layout - Example F61
Figure 7-7. Core Component Layout - Example G (Effective Single Blower Option)62
Figure 7-8. Core Component Layout - Example H (Effective Single Blower Option)63
Figure 7-9. Core Component Layout - Example H (Effective Single Blower Option)64
Thermal Test Method65
Components Used for Testing65
Stress Software66
Figure 7-10. Power Thermal Utility Example66
Temperature Measurement Locations67

Brand	Intel
Model	Thin Mini-ITX
Category	Motherboard
Language	English

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