Hi, I have a desktop but unfortunately it chokes on games because of its 4gb of ram. It has 1x4gb ram branded Corsair Vengeance. But here I want to add a 1x8gb ram chip to my PC (I need the extra ram for work)http://pages.ebay.com/link/?nav=item.view&id=221352995375&alt=web . So now I'll have 12gb of RAM (I know its not the best config). I've heard its not a good idea to mix ram slots because of voltage configuration but both ram slots are from corsair and are vengeance. Will it work?