Alright I'm about to upgrade my computer significantly and need some quick questions answered. I currently have a stock Dell Inspiron 530 except that I replaced the power supply and added a HD 4870 graphics card about 6 months ago... but my processor is garbage and it's time to upgrade. I'm interested in purchasing a AMD Phenom II 1090t X6 processor, and therefore need to upgrade the motherboard too. (I'm also purchasing a new case and some better memory). Anyway, I'm just wondering if the processor I mentioned is compatible with the following motherboard?
Newegg.com - GIGABYTE GA-890GPA-UD3H AM3 AMD 890GX HDMI SATA 6Gb/s USB 3.0 ATX AMD Motherboard
And my other question.. I currently have windows vista installed but don't feel the need to upgrade to Windows 7, If I keep the current hard drive that my computer has, will I be able to keep my current OS without buying a new one? I don't have the disks that go with it because they didn't give them when I bought this computer 4 years ago.