Lead Role: Intel Core i7-4770K Processor
We will use a Core i7-4770K processor for our practical exploration of the Haswell series and LGA1150 platform. It is the senior model in the whole series which is meant to replace the Core i7-3770K (Ivy Bridge) after the latter’s one year of being in the office of Intel’s flagship.
Interestingly, the mentioned quad-core CPUs have a lot in common despite belonging to different generations: Turbo Boost, Hyper-Threading and caches (64KB L1 per each core, 256KB L2 per each core, and shared 8MB L3 cache). That’s why we are curious to compare the Core i7-4770K against the Core i7-3770K since any difference in performance is likely to be due to improvements in microarchitecture.
The peak clock rate the Core i7-4770K can work at thanks to Turbo Boost is 3.9 GHz. The CPU is clocked at 3.9 GHz when only one or two of its cores are in use. When three cores are in use, the clock rate is up to 3.8 GHz. At full load the CPU is clocked at 3.7 GHz. When idle, the Core i7-4770K drops its clock rate to 800 MHz, which is twice lower compared to the idle frequency of the previous-generation CPUs.
As promised, the clock rate of the L3 cache changes independently of the x86 cores but often coincides in practice. The uncore part of the CPU only works asynchronously either in power-saving states or in Turbo mode.
The voltage of the x86 cores of our Core i7-4770K is 1.06 volts. That’s typical for 22nm CPUs.
Intel has developed new colorful packaging for its fourth-generation Core processors.
The boxed CPU comes in two versions: with or without a cooler. We guess the latter version is better since older LGA1155/1156 coolers are perfectly compatible with the LGA1150 platform.