Really bad internet lag in co-op.

[22b3]

Whenever i play with anyone, i always experience really bad lag. Not the game moving slowly kind but the relly irritating kind where it moves you back and then forward and no enemies are dead, etc. Is there any way to fix this other then getting a new router? It never did this before and i don't know why it's doing it now...

[Armoured Warrior]

How fast is your internet?
Are you using Wifi or do you have a ethernet cable?
If using Wifi, is your computer far from it?
Is anyone downloading or streaming while your playing?
Are you playing with people really far or close?

Try to make friends with people who live in your country or neighbouring countries

[22b3]

My internet is ok, downloads used to range from 1mbs to 1.2mbs. Now it drops down and hovers around 500kbs.
I'm using wifi but my computers not to far away, pretty much in the next room over.
No one else is using the internet as far as i know. My siblings just watch the tv and my mom uses her smartphone.
I recently played with someone from the us and the lag was unbearable. I've played with people from places like singapore and japan and it ran just fine, even europe.

[Ogre420]

Possible causes...

Someone using an open mic. especially someone with speakers and an open mic.
They are constantly transmitting audio packets, and depending on everyones setup it could really choke the connection. make sure everyone is using press to talk.

Virus scanner.

Hard drive in need of defrag/cleaning (I've seen systems with GIGAbytes of files in the recycle bin, and some installers leave alot of garbage behind when through.

SWAP FILE running out of room. Check the size and placement of your swap file, and make sure it has room to expand.

Background programs running (even if your not aware of it.)
(Try "RAZER"'s "GAME BOOSTER" it shuts down all non essential (SP) programs when gaming, and restarts them when the games over.)

Check your internet provider contract, some will throttle back your connection speed after you have exceeded their monthly bandwidth limit.

Check to see if you have a dedicated internet connection, some cable companies used to claim high transfer rates but didn't tell people that they where sharing bandwith (on the poles) with thier neighbors. (Your neighbors may be running a torrent site, or downloading movies or gigabytes of porn.)

[22b3]

Most of that i'll be sure to check but i'm running my game on a mac. My mac runs the game just fine along with other games like the witcher 2 and the first one. Don't know why this is happening now though.

[Sir SantaHatesYou]

Hello my friends