I recently bought an 865PE mobo, an Asus P4P800, after reading many reviews. The only difference I could find from it and an 875 is the PAT. It is my understanding that the 865/875 chip is the same, except for the enableing of this feature. However, Asus claims that this feature is enabled on their board as MAM. I think other mfg's do the same thing under different names. If you can get this feature on an 865PE, then the only difference between it and an 875 is the price, as far as I can tell.