"The new quad-core Core 2 Quad Q9300 processor priced at $266 should be at least as demanded as its predecessor, Core 2 Quad Q6600. Being Intel's cheapest quad-core processor built using the latest production process, this newcomer has a number of indisputable advantages: high clock speed, increase bus frequency, SSE4.1 instruction support and a few other micro-architectural improvements. Even despite the reduced to 6MB L2 cache, all these features ensure a pretty noticeable performance improvement. According to our tests, the average performance advantage of Core 2 Quad Q9300 over Core 2 Quad Q6600 is about 7%. And what is especially pleasing, you will get this performance gain absolutely for free: Core 2 Quad Q9300 will be priced officially exactly as Core 2 Quad Q6600.
In addition I would like to say that the use of more advanced manufacturing technology helped reduce power consumption and heat dissipation of the new processor. Our practical experiments revealed that it consumes about 30W less when running in heavy burn mode."