http://blog.linode.com/2013/03/18/linode-nextgen-the-hardware/
Powering our NextGen hosts are two Intel Sandy Bridge E5-2670 processors. The E5-2670 is at the high end of the power-price-performance ratio. Each E5-2670 enjoys 20 MB of cache and has 8 cores running at 2.6 Ghz. We’ve also moved to the latest generation of the enterprise-grade hard disk drives — doubling their cache, increasing their port speed, and decreasing latency and access time.
Should have some benchmark comparisons shortly.