You can usually get this information on your PC’s site. The short answer is yes–most modern computers use DDR4 SDRAM, but the standards are not universal and you may need to check your computer if you’re uncertain.
There are three main types of RAM that are used in today’s computers: GDDR3, GDDR5 and DDR2. Though these types differ by name, they ultimately work in the same way by sending a ‘high’ signal when data is read from a memory location (or written to it). When talking about normal desktop PCs with integrated graphics cards without any other form of onboard RAM-connection, “RAM” refers to Random Access Memory (Graphics Card) or VRAM for video processing.