I recently switched from a 75hz 1080p monitor to 165hz 1080p monitor .. But my GPU only has 2 ports Hdmi and DVI so I tried to connect with the HDMI which I got from the old monitor and i actually got the 165hz but it goes black screen randomly.. it used to happen with the 75hz monitor too just before me switching it. But it's happening more in the 165hz monitor. Is it because of the HDMI cable or HDMI not actually supporting 165hz..