So i already have a 4gb ram memory and it says in the box is 4GB DDR4-2400 CL15 288 - Pin UDIMM and the model is HX424C15FB/4. Im planning to upgrade on 8gb and search from online markets. I saw the ram that i am looking for with exact same model but the description says its non-ecc and 4GB DDR4 - 2400 CL15 288 - Pin DIMM ? Is it the same or its different ? Should i buy it ? Thanks for response.