I have tried my lexar 1000x cards and sandisk extreme cf cards and sandisk SD cards in my d800 they read and write fine....but when I tried to format them to erase the old photos, the camera went through the format sequence but did not format (erase the photos. anyone else have this problem? also have a soft left focus point. Called nikon and got a run around.
If you're using the "two-button" format method, I presume you are pressing the buttons a second time, as per pages 32-33 of the camera manual? I also presume you have selected the correct memory card slot to format?
1. If you are trying to format them using the menu, you have to press the "OK" button at the bottom left of the rear of the camera. some other models let you press the center button of the multi-selector and that does not work with the D800.
2. If you are using the 2 button method, you have to press them a second time to effect the format.
Peter -- Years ago I was the 7th Fleet Public Affairs Officer, and our Admiral had a small paper sign, written in pencil, taped on the front of his desk that told of the complexities of military command. It said, "Too many moving parts." That applies to digital cameras too!