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Weird lag while playing games

Last response: in CPUs
January 23, 2013 2:16:21 PM

I don't know if it's something to do with overheating of my CPU or GPU, or even a problem with my network adapter
I will be playing far cry 3 max settings, and every now and then my game will start lagging like it's just stuttering, it replays the same noise. When I alt tab out my curse jumps every now and then of course there is no noise so i cannot hear the audio lag during this.
I worked out that by disconnecting from the network it fixes it, and remains fixed even if i reconnect straight away. This happens mostly while playing far cry but it has happened whilst streaming videos.

Any ideas anyone? I do not want to cause any long term damage to my system so I want to get it sorted asap.

i5 3570k w/ stock cooler @ 3.4ghz (stock)
asus gtx 660 w/ directcu II
msi p67a gd53 b3
750w ACE psu
80gb hdd for OS + 250gb hdd for games.
January 23, 2013 2:58:38 PM

What's your ram size, sometime low ram memory is the problem, better have 8gb or more for playing at max set..
a b à CPUs
January 23, 2013 3:10:15 PM

Also that PSU sounds like a piece of junk.
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January 23, 2013 3:20:22 PM

The PSU is, admittedly, an awful piece of hardware but I could not afford anything better.
I have 8gb Corsair 1600mhz RAM.
a b à CPUs
January 23, 2013 9:51:28 PM

I've had my router get stuck on some malformed packets causing games to lag.
Replaced it with a router w/firewall that does stateful packet inspection.

Could be the NIC or some auto-updater that's accessing the internet while you play. PCIe gigabit NICs are very cheap these days.

I'll assume you've done a virus/rootkit scan.