An anonymous reader writes, "The first reviews of Intel's new quad-core Core 2 Extreme QX6700 have emerged this morning and opinion is mixed. TrustedReviews were blunt: 'There is nothing new on display here. Very few people will need quad cores...' while Tech Report think 'many owners of this beast may be stuck waiting for new applications to arrive that use it to its fullest ability.' The boys at bit-tech managed to overclock to 3.47GHz and found the first killer application: quad-core support in the Source Engine! Nice!"