I just bought my AMD chip last week. I have had the same problem getting a 1.3ghz chip, everyone was out of stock. Instead I got a 1.2g (266fsb), i love it and I have had no problems. If you really want the 1.3gh go to pricewatch and start making some phone calls.
My system:
AMD 1.2GHZ (266)
A7V KT133A MB
256MB RAM
30GB HD
HERCULES GEFORCE 2 64MB (PRO)
SB LIVE
10/100 NIC
----------------------------------
I bought a pentium once!
Everybody makes mistakes..