See my edit, I meant the Opty 175. That clears up the Ghz mismatch. The core has a different name because it is the Opteron line, not the Athlon line. Opterons are designed for servers, but they still work in desktop boards. The Opteron and Athlon both have the same HT at 2000Mhz. I think Newegg forgot to doublepump it, (2x1000=2000).
kmiller, if you dig into Asus' website for the CPU support page:
http://support.asus.com/cpusupport/c...Language=en-us you'll find that the A8N-SLI Premium supports the range of Opterons, from the 144 to the 185.