I have a fairly new build using I7 4790k, z97 motherboard, 2 8gb sticks of gskill trident 2400 cas 10 ram. Window 8.1 64 bit. My issue is when i download my memory usage climbs a bit which is normal but once download is finished the mem usage keeps climbing to like 90%. I have look through task manager and nothing is using too much ram, I have ran a couple of malware scans, ran memtest. If i restart pc it goes back to normal until i download something. I use a kingston 120 ssd and 1 tb wd black.