Page 1: Test: Intel Core i7-4790K
In mid-May, Intel released their "Haswell Refresh" CPUs. They did not offer much more than their predecessors, only a small clock speed upgrade from 100 to 200 MHz; in our test they were only able to show a performance increase of a few percentage points. But in turn Intel sold their "Haswell Refresh" at the same price. Just in time for the Computex 2014, the chip manufacturer released their new CPUs of the "Devils Canyon" series, primarily aimed at ambitious overclockers and featuring a few improvements here and there. In this article we will be taking a closer look at the new flagship of the Z97 platform, the Intel Core i7-4790K.
After the presentation of the new "Haswell Refresh" CPUs, the only ones missing were models with a free multiplier. And here they are, the Intel Core i7-4790K and Core i5-4690K, Intel's new "K" models in time for this year's Computex. The "Haswell refresh" CPUs only provided a higher base and turbo clock raised from 100 to 200 MHz, but otherwise the well-known "Haswell" architecture and the 22nm manufacturing process; the new "Devils Canyon" CPUs feature one or two improvements and were designed especially for ambitious overclockers.
In addition to the unlocked multiplier, Intel also removed one of the biggest criticisms. Since the "Ivy Bridge" generation, the heat spreader of the K-CPUs is no longer soldered on the CPU. Between Die and heat spreader we now find the thermal interface material (TIM), a kind of thermal paste. In their new "Devils Canyon", Intel implemented a new chemical compound that promises better heat dissipation. The temperatures should thus reach the same level as a soldered heatspreader. This improved TIM is called Next Generation Polymer Thermal Interface Material (NGPTIM). Additional capacitors now promise a more stable power supply. Intel also slightly increased the TDP when compared to "Haswell": the new "Devils Canyon" models consume 88 watts instead of 84 watts.