I used to frequent Anandtech, Digital Foundry and ExtremeTech as they all had pretty good articles that sometimes went quite deep into the matter at hand. Anandtech its quality has gone down a lot, ExtremeTech is full of ads, ZergNet links and a constantly running JS script (probably a tracker?), and Digital Foundry its deep dives have become a lot less frequent. Only Ars Technica remains :/