Hello, I recently acquired a older dell m6600 for a decent price and was going to upgrade this thing to its limits. I plan on sticking with this model unless I can come across a 6700/6800 for a good price. Now I've heard of people getting hd 6xxx/7xxx/8xxx and r9 2xx graphics chips to work with these things but also heard tales of gtx 6xx/8xx/9xx cards working in them swell. I wanted to hear from someone more experienced with these things than I am, laptops are fairly new to me as I normally focus on vintage hardware. Any chance of any of them working in this machine? or has anyone done similar?