blackwidow v4 lagging while gaming

hi there,ihave a blackwidow v4 and while gaming the keyboard very often is lagging...For example whille using W,A,S,D keys for movement in game it seems that its long pressing the buttons and delays a lot.Sticky keys deactivated.Firmware last version-delleted and installed synapse again poll rate 1000….Tried diffent usb ports stilll the same...Any idea what could be happening ?