Hi, if i were to buy an AMD RADEON 7990 6GB for £406 to mine litecoins, could i just put it in my pc and start mining?
Yes you should be able to add it to your machine and start up your flavour of miner and connect to your favorite pool and start mining. Based on what you are looking to mine will determine which settings you use for your miner. (make sure you update the the catalyst drivers and you should be good)