How well does the AI Servo mode work?
Put a Core i7 in a 4gb machine and the performance will not be good - the CPU is the headline that the manufacturers push - a Core i3 with 16gb will probably out perform this.The i7 would still easily outperform an i3 in that situation. More RAM accounts for some performance increases (it takes the load off the usual bottleneck in a system, the hard drive, due to fewer page writes to disk), but not enough to overtake a significantly faster CPU like the i7 in most situations (remember the i7 has 4 physical cores and 4 virtual cores, totalling 8 effective cores - twice as many as the i3).
I would suggest 8gb should be the minimum in a PC that is going to do significant work.I agree. And RAM is so cheap now that there's really no excuse for having less than this in a new system. Unless you buy your memory from Apple, in which case you'll pay 2-3 times more than you should...
I have cabled my network through the house rather than use wifi (although we do have wifi). Wifi takes a lot of power to drive from the home routers and I have found that 2 laptops on wifi will slow the network down to the point where web access becomes unacceptably slow. The only regular wifi usage now is by our phones, which use insignificant capacity.Wi-fi performance can be hindered by trying to have too much range. Wi-fi routers can broadcast to multiple computers at full speed simultaneously, but can only receive data from one client at a time. So if you have a laptop with a weak signal (which in turn means that it has a slow connection speed), then all of your other wireless devices have to 'wait' for the slow laptop to talk to the router at terribly slow speeds before they can have their turn. In other words, the slowest computer wi-fi connection essentially dictates the speed of your entire wi-fi network. Hard-wiring your network is a good solution too.