ATX Version 3 Multi Rail Desktop Platform Power Supply

Design Guide

ID 336521
Date 11/01/2023
Document Table of Contents

Labeling and Marking - RECOMMENDED

The following is a non-inclusive list of suggested markings for each power supply unit. Product regulation stipulations for sale into various geographies may impose additional labeling requirements.

Manufacturer information: Manufacturer's name, Part number and Lot date code, etc., in human-readable text and/or bar code formats.

Nominal AC input operating voltages (100-127 VAC and 200-240 VAC) and current rating certified by all applicable safety agencies.

DC output voltages and current ratings.

Revision number of the ATX, SFX, etc. specification that the power supply meets.

Access warning text (“Do not remove this cover. Trained service personnel only. No user serviceable components inside.”) must be in English, German, Spanish, French, Chinese, and Japanese with universal warning markings.

Power Supplies are recommended to list if it meets the Recommended Timing values (T1 & T3) in product documentation. There are two levels of timing for T1 and T3 a power supply can support as detailed in Table 4-10. This will help power supplies that meet the lower T1 & T3 timing values highlight that it meets the lower timing values to OEMs and end users.

12V-2x6 connector/cable harnesses that are hard-wired to the power supply shall be labeled indicating the maximum power supported according to the SENSE0/1 encoding implemented for each connector. If PSU is a modular design or if the Sense lines are dynamic (can change in standby mode only), another location on the PSU (highly recommended to be on the PSU Voltage Rail label) and the product documentation must describe the power levels supported. If the criteria for different power levels based on the number of PCIe* Add-in Cards connected that must be described for the OEM or end user as well. SENSE0/1 are described in Section Section 3.3.1 of this document. An example of these labels is illustrated in Figure 5-1 below.

Figure 5-1: 12V-2x6 Connector Labeling Example