Intel Core i7-3820 Processor Review - Quad-Core Sandy Bridge-E under $300
Synthetic CPU and Memory Tests
SiSoft Sandra 2011
The latest version of SiSoft Sandra offers up a lot of new features including GPU performance, OpenCL, etc.
The performance of the Core i7-3820 compared to the 2600K is about where we would expect it in the synthetic performance numbers based on our default clock speeds. The memory performance of SNB-E is obviously far ahead of SNB though that doesn't directly translate into application performance improvements often.