I recently bought a SZ4MN/B laptop. It supposedly comes with a Core 2 Duo T5600 processor - that's what I ordered, that's what the box says, that's what the sticker on the machine says.
Although the Control Panel / System summary says I have a T5600 1.83mhz processor, when I go into device manager and look under processors, it says that I have a T7400 2.16mhz processor (two, in fact). Surely some mistake. CPU-Z says it's definitely a T5600.