Intel has finally filled out the Sandy Bridge E lineup by releasing the Core i7-3820. The initial Sandy Bridge E lineup launched back in November 2011 and it consisted of two SKUs, the i7-3960X and i7-3930K. While the i7-3820 wasn't released until this week, we reviewed it over a month ago, so head there for a longer analysis. The table below summarizes the current Sandy Bridge E lineup:

The short summary is that i7-3820 is Sandy Bridge E on a budget. In terms of CPU performance and price, it's equivalent to the i7-2600(K) but provides higher I/O performance due to the quad-channel memory and 40 PCIe 3.0 lanes. Anand summed it up nicely in his review, so we'll just repost here.

There are three reasons why you'd want the Core i7-3820:

1. You need PCIe 3.0 today and/or you need more PCIe lanes than a Core i7-2600K can provide.
2. You need tons of memory bandwidth for a particular application.
3. You want a 2600K but you need a platform that can support more memory (32GB+).

So in general, most users will be better off with a LGA 1155 based platform. While the i7-3820 is actually cheaper than the i7-2600K, the total price of the platform is not. LGA 1155 based motherboards go for as little as ~$50 (e.g. Gigabyte GA-H61M-DS2). If you want more features such as Intel Rapid Storage Technology, you can get a Z68 based motherboard for around $90 (e.g. ASRock Z68M/USB3). In contrast, the cheapest LGA 2011 based motherboard starts at $210. Unless you benefit from the extra features that Sandy Bridge E offers, your money is better spent else (e.g. on an SSD).

Source: Intel