4. Instructions for use.(CR2032,3V) battery into the battery holder of the test card, and the tester into the DDR5 model on the motherboard, and then the motherboard installed CPU, press the key switch on the test card, you can judge the motherboard memory part of the open circuit, short-circuit fault. 1. DDR5 doubles the memory read speed to 6.4 Gbps, while also greatly increasing memory capacity. DDR5 bandwidth for DDR4 twice, module transfer rate can reach 4.8 Gbps , faster than DDR4 existing new module 3.2 Gbps 50%, the transfer rate is expected to reach 6.4 GbpSo 2. DDR5 device internal operating voltage of 1.1V, more power-efficient than DDR4's 1.2V. DDR5 form factor to maintain the same number of 288 pins as DDR4, but the definition is different, not compatible with DDR4 slot. 3. DDR5 tester all support for , for all DDR5 interface motherboard, with light-emitting diodes to indicate the data line, address line open and short circuit, used to repair not boot, not display, not read the memory and other motherboard failure, is a tool to repair the computer motherboard. 5. If a LED is not lit, find the number of pins corresponding to the LED, to continue to find the memory slot and CPU block is open and shorted to ground, whether the memory slot is damaged, etc. If a LED is particularly bright, it is necessary to check whether this signal is shorted with the power supply, Manufacturer: Akfldms