thanks. Oh dear. Cyg: remind me of you card, it's a Geforce right? So far in this thread all the Radeons are fine, and the Geforces aren't... This is the code btw:
Strict Local DesktopRefreshRate = GetDeviceCaps(GetDC(0),VREFRESH) Local w = 800, h = 600 Graphics (w,h,0,DesktopRefreshRate) Local x = 0, y=0 While Not KeyDown(KEY_ESCAPE) Cls DrawRect (x,y,200,h) Flip x = x + 10 If x > w Then x = 0 WendBUT I have Skidracer's VSync tweak in d3d7graphics.bmx. Just wondered how many machines it worked on.