So clocking the CPU socket (bus) faster than 28 MHz is pointless except for any onboard memory (60 ns dram?).
With higher clock speeds RAM becomes a huge (tiny) bottleneck. That's why today's systems have large caches and synchronous memory with ever increasing clocks.
My Phenom uses more than 8 MB cache - a completely ridiculous amount if you think about it and nearly half the
total amount of memory in my A3k.