I got my new ASUS PC which comes with AMD Radeon R7 240 graphics. I hooked it up to my existing Philips 170C monitor, via the VGA port. I notice ghosting effect, especially around letters or vertical black lines on white background. How can I fix this? I use this monitor (with the same VGA cable) with my Laptop (with onboard Intel Graphics) and my older Desktop PC (with an old GeForce 7300 LE card) and they both work fine.