Summary of Contents for PassMark PM123
- Page 1 Inline PSU Tester Users Guide Model PM123 Rev 1 Document Edition: 1.3 Date: 1 November 2019 Web site: www.passmark.com Inline PSU Tester – User’s Guide Page 1...
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Page 2: Table Of Contents
Table of Contents Introduction ........................3 Warnings – Important – Please read................4 Background ........................5 ATX and ATX12V standards ..................5 Major changes in ATX/ATX12V revisions ............... 5 PSU Cables ........................ 6 DC Regulation range....................8 Output Ripple/Noise ....................8 Timings ........................ -
Page 3: Introduction
Introduction The PSU Tester can be used to diagnose and troubleshoot your desktop power supply. With the PSU Tester, you can: • Check power supply voltages are within the approved limits. • Record the minimum and maximum of voltage and current for each voltage rail. •... -
Page 4: Warnings - Important - Please Read
Warnings – Important – Please read. Do not skip this step. Safety should be your primary concern during a power supply test with a PSU tester. • Remove anything conductive from your hands (e.g. metal rings, watches, or bracelets) before testing a PSU or working inside your computer. •... -
Page 5: Background
Background A power supply unit (or PSU) converts mains AC to low-voltage regulated DC power for the internal components of a computer. The PSU normally supplies +3.3 V, +5 V, and +12 V and -12V to a PC. Older systems (before Pentium 4 and Athlon XP platforms) were designed to draw most power from 5 V and 3.3 V rails, while the newer machines draw most of their power from the 12 V rail. -
Page 6: Psu Cables
PSU Cables Typically, power supplies have the following connectors: Motherboard power cable: This is the cable that goes to the motherboard to provide it with power. The connector has either 20 or 24 pins. The older 20 pin main power cable only has one 12V line. The new 24 pin connector added one line apiece for ground, 3.3, 5, and 12V. - Page 7 Figure 2: 8-pin CPU power connector Color Signal Signal Color Black Ground +12 V Yellow Black Ground +12 V Yellow Black Ground +12 V Yellow Black Ground +12 V Yellow Table 3: 8-pin CPU power connector pinout PCI Express power cable: This is the cable that goes to the PCI Express cards (e.g.
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Page 8: Dc Regulation Range
Figure 4: 15-pin SATA connector 4 5 6 7 8 9 10 11 12 13 14 15 Signal +3.3 V Ground +5 V Ground +12 V Table 5: 15-pin SATA connector pinout DC Regulation range The DC output voltages shall remain within the regulation ranges shown in Table 1. PSU Output line Range Min. -
Page 9: Ramp Up
Figure 5 Power-on Time (T1): The power-on time is defined as the time from when PS_ON# is pulled low to when the +12VDC, +5VDC, and +3.3VDC outputs are within the regulation ranges. The power-on time shall be less than 500 ms (T1 < 500 ms). Rise Time (T2): The output voltages shall rise from ≤10% of nominal to within the regulation ranges within 0.1 ms to 20 ms (0.1 ms ≤... -
Page 10: Power Sequencing
Power sequencing The +12 VDC and +5 VDC output levels must always be equal to or greater than the +3.3 output during power-up and normal operation. The time between the +12VDC or +5VDC output reaching its minimum in-regulation level and +3.3VDC reaching its minimum in-regulation level must be ≤... -
Page 11: Device Operation
A failing power supply can often be at the root of problems you might not expect, like random lockups, spontaneous reboots, and even some serious error messages. The PassMark PSU Tester is designed to quickly test a PC power supply. Configurations The tester can be used in two different configurations. -
Page 12: Lcd Display
Figure 8 LCD Display The PassMark PSU Tester features a built-in 1.8” TFT LCD display to show voltage, current, ripple and power for each voltage rail. The default screen when a device is connected to a PSU is shown below. -
Page 13: Keypad
PASS means voltage is currently within the approved limits, but an under-voltage was detected previously. FAIL means voltage is outside the approved limits. Keypad The Tester has a membrane keypad with four keys. Power On/Off button: This button forces a power-up by asserting the PS_ON pin to logic low (PS_ON is active low). -
Page 14: Input And Output Connectors
Page Mode 1 Mode 2 Mode 3 Mode 4 Table 10 Input and output connectors The tester has four inputs and four outputs terminals. The input terminals marked with “In” suffix should be connected to PSU. The output terminals which are only used in inline configuration are marked with “Out”... -
Page 15: Cables
Figure 10 Cables Each tester comes with 5 cables: - A USB 2.0 A to B cable for connecting the tester to PC. Figure 11 - A 24Pin female to 20+4Pin male for connecting the “24-Pin Out” terminal to motherboard. Figure 12 - An EPS 8Pin female to 4+4Pin for connecting the “CPU Out”... -
Page 16: How To Test A Power Supply Unit
Figure 13 - An EPS 8Pin female to 6+2Pin Male for connecting the “PCIe Out” terminal to motherboard. Figure 14 - A 5Pin to dual SATA 15Pin female for connecting the “SATA Out” terminal to external hard drives. Figure 15 How to Test a power supply unit Standalone mode 1. -
Page 17: Monitoring Software
Inline Mode 1. First turn off the power supply by setting the I/O switch on the back panel to the “O” stand. 2. Disconnect all peripherals and devices from the power supply and connect the 24-pin, 8-pin connector and 6-pin cables of the PSU to the corresponding ‘In’ terminals of the PSU Tester. - Page 18 The main screen contains the following features and options: Device COM Port: The PSU Tester appears as a Virtual COM port when connected to PC. You can determine the Virtual COM Port by opening the Device Manager and looking for USB Serial Device (COM #) or STMicroelectronics Virtual COM Port (COM #).
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Page 19: Configuration Window
Configuration Window The following options appear in the configuration window: Connected Cables: This allows you to specify which cables are connected so that the unavailable voltages will be excluded from the PASS/FAIL criteria. Compliance Mode: This option allows the user to select the compliance mode. In the “Strict”... -
Page 20: Driver Installation
Step 2 – Install the device driver Download the latest driver from the following address and extract the package. https://www.passmark.com/products/psu-tester/download.php The STSW-STM32102 software package contains four installation files based on the various versions of the Microsoft® operating system. Run the setup file according to the version of your operating system. -
Page 21: Technical Specification
Technical Specification ARM Cortex M4 Memory 32KB RAM, 128K Flash 1.8” TFT LCD 128X64 Pixels + User Interface Membrane Keypad Standards ATX12V Connectors 24-Pin In, 8-Pin CPU In, 6-Pin PCIe In, SATA In, 24-Pin Out, 8-Pin CPU Out, 6-Pin PCIe Out, SATA Out Internal load Internal load (1Watt) on +12V1DC, +12V2DC, +5VDC and +3.3VDC... -
Page 22: Software Compatibility
Storage Temperature -30 ºC to + 80 ºC Usage Temperature 0 ºC to + 40 ºC Part number PM123 RoHS (Lead free) Table 13 The PSU Tester firmware is software upgradeable in the field. Software Compatibility Window 7, 8, 10 are supported. -
Page 23: Some Real-World Faulty Power Supply Tests
Some real-world faulty power supply tests Antec EA-550 GREEN This is a 550 Watt 80 Plus Bronze Certified power supply. Claimed power specifications: Rail +3.3V +12V1 +12V2 -12V +5VSB Max. Amps 0.3A 2.5A Power Watts 360W 360W 3.6W 12.5W Total Max. Power (W) 550W Table 14 Test Results:... -
Page 24: Antec Neoeco 520C
Figure 19 - Efficiency: Using BurnInTest, we put system under load by running the following tests. Test load 1: CPU (General purpose instructions, 5 Threads) Test load 2: CPU (General purpose instructions, 11 Threads) and 3D Graphics test (window size 640x400 pixels) Mode Output Power Load Input Power... - Page 25 Test Results: Figure 20 - Failed to meet the power sequencing criteria (V column showed a red circle). This was confirmed by looking at 5V and 3.3V rails by an oscilloscope. As you can see in the below screenshot, the 5V rail was greater than 3.3V for the first 500 microseconds.
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Page 26: Seasonic Ssr-360Gp Active Pfc F3
Mode Output Power Load Input Power Efficiency Idle Load 1 104W 126W Load 2 259W 301W Table 17 The efficiency measurements confirm that the PSU meets the 80 Plus Bronze efficiency requirements at 20% and 50% loads. Seasonic SSR-360GP Active PFC F3 This is a 360 Watt 80 Plus Gold Certified power supply. -
Page 27: Seasonic Ssr-650Rm Active Pfc F3
some PCI sound-cards. These are starting to become very rare, therefore this failure alone is not enough to render this PSU as faulty or not usable. Figure 23 - Efficiency: Using BurnInTest, we put system under load by running a combination of tests simultaneously. - Page 28 Test Results: Figure 24 - T2 Min Slew Rate for the 12V1 and 12V2 voltage rails failed to meet the criteria. This is confirmed by looking at the 12V rail by an oscilloscope. As you can see the area marked with red colour has a slew rate less than 0.6V/msec. Figure 25 - Voltages were within the specification except for the -12V rail which went outside approved limits when the PSU was under a heavy load (>300W).
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Page 29: Ocz600Mxsp
The inclusion of this PassMark Software product in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies PassMark Software against all charges.