I want to get this graphics card, Sapphire Radeon HD 5570 it needs a PCI-E 2.0x16 but i have a PCI-E 1.0x16 on my motherboard. I heard that you can use a 2.0 on a 1.0 but you wont get the "full" performance out of it but its not that big of a diffrence, is this true? cause i dont wanna buy it and have it not work.