its a bug in there game there are thousands of people have this problem so far its not hardware i didnt have the problem till about 2 weeks ago i thought it was ram ran memtest for 10 hours each on each stick of ram i have no errors formatted even went as far as buying a new motherboard and runing the tests agian nothing but i still remain to get the errors its on arenanets side hopefully they get this bug fixed if it helps it seems everyone having the error is on nvidia and more specificlly the 5 series i have a
intel i5 2500
2×4gb sticks of Corsair Vengence Ram
500GB seagate 7200 rpm drive
and of course what most people are having problems with
a Nvidia gtx 560
it seems most people are having problem with nvidia cards i dont think it has anything to do with ram at all i just hope they get the problem fixed soon