DDR is a feature of memory. It means a double data rate and is a more sophisticated version of the SDRAM, which is a memory. And the rest like the Multicore, 64-bit processing, and the L1 cache are the features of the CPU. And hence, the correct option here is none other than DDR. Remember that the L1 cache is the memory bank, which is being built over the CPU chip. And we have 32 bit and 64-bit processing for the CPU. As well as CPU can be dual-core, quad-core and likewise.
A power supply unit (or PSU) converts mains AC to low-voltage regulated DCpower for the internal components of acomputer. ... Some power supplies have a manual switch for selecting input voltage, while others automatically adapt to the mains voltage.
