i5-4670K
Batch: L312B140
Max Clock 6300 MHz
Max Clock SuperPi1M: 6200 MHz
4000 MHz @ 1,010 V (primestable)
4600 MHz @ 1,230 V (primestable)
5000 MHz @ 1,290 V (SuperPi32m 4C4T)
i7-4770K:
Batch: L313B996
Max Clock: 5800 MHz
Max Clock SuperPi1M: 5700 MHz
4000 MHz @ 1,145 V (primestable)
4300 MHz @ 1,295 V (primestable)
5000 MHz not possible below 1,40 Volt