Just bought a 3770K to replace a 3770 that I accidentally bought. Now I'm thinking I should've kept the 3770. I can't seem to get this thing stable past 4.3 GHz. If I set the multiplier to 44, bumping the vcore all the way up to 1.3v isn't enough to get it through more than a couple hours of Linx. My board is a Gigabyte GA-Z77X-UD3H. I haven't touched the bus frequency at all. From everything I read, I thought 4.5GHz would be very much obtainable.