I usually know that 4gb is enough for most situations, but as I keep reading more and more it seems like people are changing to say that 8gb is better to get even if you don't plan on using heavy programs. The thing is that I remember having a laptop with a core i5 and 4gb of ram. That was the slowest computer I had ever used. Which is making me think they're right: 8gb of RAM is necessary. I could barely open Chrome! However, maybe it was a defective laptop. I just bought the Surface pro 4 with the 4gb. I don't want to open it yet, however do you guys think that using it just for web browsing (having around 6 tabs open) and using it for PDF's (some files more than 100 pages)?