Actually, Power4 is more than a processor, it's an entire neighborhood of processors. It's sold as a module comprising two processor cores per die, and four die per module, making eight 64-bit processors and 680 million transistors in one unit. Each individual die contains 174 millions transistors and measures a sun-blocking 400 mm2 in IBM's 0.18-micron 7-layer copper process.
thats a quote from extremetech.com '8 processors' ....