This week Intel quietly upgraded its Core 2 Duo processor line by releasing the E6320, and E6420, which increase the L2, cache on the current E6300 and E6400 from 2 MB to 4 MB. Prices of the new chips match their 2 MB L2 cache counterparts.
In Q3 Intel is expected to update the Core 2 line with 1333 MHz front side buses and drastically cut prices of its quad-core chips with the low end being the 2.4 GHz Core 2 Quad Q6600 at $266 per unit, the same price of fastest (3.0 GHz) dual core chip. No doubt there will be a lot of benchmarking done to determine under which circumstances one out performs the other.
Canadian computer store PC Canada lists the chips as being available on Monday, April 23rd at $15 more than their 2MB counterparts.