My new 2600k L042B208 is turning out to be a pretty good chip. 4.8ghz at 1.375V without internal pll overvolt enabled. My 2500k needed 1.41V with the same settings and internal pll overvolt enabled. My new chip does have some strange temp issues. The 3rd core is 8C higher than cores 1 and 2. The 4th core is 6C cooler than cores 1 and 2. Remounted several times.