The Acer Aspire 5 does come with two RAM slots, but knowing which type of RAM to install is important. CAS Latency, or how fast the RAM can respond, is important for gaming and other high-intensity tasks. A low CAS latency will result in faster response times and better gaming experience. For general use and browsing, a higher CAS latency is not necessary and may even result in slower performance.
Installing the wrong type of RAM can also cause issues such as computer crashes or random system errors. It is best to speak with an expert to determine which type of RAM will work best for your Acer Aspire 5.