Random freezing in multiplayer games

[DeadliestMoose]

I recently just replaced my old ATX build with a mITX build with the following parts: i5 4670k (not yet OC'd), MSI GTX 760 Twin Frozr (non oc'd), Kingston hyperx blu ram (xmp profile 1), Asus Z87i Deluxe mobo w/ latest drivers, in a Corsair 250D. I've been noticing ,only in multiplayer games, that it will completely freeze for a few seconds (audio and video) and then be back to normal for a few minutes. I don't have this problem running single player games or other client side applications. I do have slight lag while browsing ,but I don't know if it's related to what is wrong while I'm gaming. I have consistently low ping (15-30ms) and only once in a blue moon does my connection drop entirely. Some help would be appreciated; I'll try putting everything back to completely stock and work from there. Suggestions would be greatly appreciated.

[jj509]

I actually have the same problem  but its in everything I do. Multiplayer, singleplayer, Browsing the internet. Everything. Sometimes it happens every 2-3 mins sometimes it happens every 30 mins. Sometimes not at all until the next reboot. Still have no clue what it is.

[DeadliestMoose]

After I reset all my setting back to default, it still does the same stuff. I'm really at a loss.