Bought a refurbished iMac. Refurbished 21.5-inch iMac 1.6GHz Dual-core Intel Core i5 Above is the model. It came with 8G of RAM, and I can't see anyway to increase the RAM. This thing is super SLOOOOOOOW! And it's new, with bare bones programs/apps installed. Is there ANY way to boot up the RAM to 16G or am I stuck?