4 ms·This is not true for all new MacBook pro. All ram modules are soldered even for non retina display.by eugenejen 14y agoThis is not true for all new MacBook pro. All ram modules are soldered even for non retina display.huxley 14y agoYou got incorrect info, non-Retina Macbook Pros have upgradeable memory and you can already buy it from suppliers like Crucial and OWC.eugenejen 14y agothanks for correction. I am sorry for confusing the issue.