Intel Core i7-4770K CPU Review - Intel Haswell For Desktop (Part 8)

9/8/2013 9:16:29 AM

To illustrate Haswell’s thermal performance we performed a quick comparison between Core i7-4770K and Core i7-3770K working in their nominal mode and tested with the same NZXT Havik 140 cooler:

The temperature of the Haswell’s CPU is excessively higher than the predecessor’s CPUs.And even though our everyday uses will not raise the CPU’s temperature too high, we still need to be aware of our conclusions primarily on specialized stability tests, which create heavy but nevertheless quite realistic load.

The comparison table between the two models

The comparison table between the two models

Therefore, the CPU’s overclocking process actually cool down the device better than those we could use for Ivy Bridge processors. In another words, it is harder to achieve the similar result when overclocking the Core i7-4770K than doing the same thing with the Sandy Bridge, which is overclocker-friendly and Ivy Bridge products in LGA1155 form-factor.

For example, we only kept the Core i7-4770K CPU at the stable frequency of 4.4 GHz. The temperature of the CPU’s cores was highly alerted, meanwhile it was running normally with the LinX-AVX, although we used a very well-performance cooler, the NZXT Havik 140.

A diagram which demonstrating the temperature and frequency

A diagram which demonstrating the temperature and frequency

In order to achieve the results as shown above in the picture, we had to increase the voltage of the CPU to 1.2 volt. It was only 0.14 volt higher than the nominal Vcore for our unique processor, however, the temperature was too high.

As the result, even a minimal increase in voltage could make a very high increase to the CPU’s temperature, which means that the micro-structure of the Haswell is not very efficient and it only has a very low voltage. Haswell-based desktop and overclocker-friendly CPUs are not energy-efficient at all. As such, Haswell’s overall overclocking potential doesn’t inspire much optimism. Another way to say, it is a repetition of the actual Intel’s microarchitecture, a failure of frequency potential, even though Intel has tried as much as possible to compensate for it by adding extra overclocking-friendly features into their new processors.


Apparently, Intel has been trying all their best to resolve the “ARM issue”. The giant microprocessor obviously does not want to hand over the compact mobile devices market to the competition, therefore all their engineering efforts have been directed towards designing x86 processors with lower power consumption and excellent performance. The CPUs, can be successfully compete with the high performance ARMs. At least, the microprocessor with this microarchitecture could function well enough with the compact ultra-books, the transformers and the high-performance tablets. And there are quite a few models in the Haswell’s family that could be used for any particular purposes. For instance, the Core ị Y with low voltage duo core has average voltage dissipation of 6 W, provided with Hyper-Threading technology and can be functioned at the frequency between 1.4-1.9 GHz. Moreover, there will be at least a few dozen different SoC U-series microprocessors, which are based on Haswell microarchitecture with 15 W TDP, which will target ultra-books.

The variety of products, which are currently being prepared to be announced after the Haswell microarchitecture launch, indicate clearly that Intel’s priorities have changed a lot. Therefore, there is a reasonable purpose for why we didn’t see much progress in the new Haswell CPUs. Intel has no need or will in improving the existing desktop platforms at the moment. The products we got today are what they managed to put together with minimal modifications to the microarchitecture, which is originally designed for mobile devices.

Strictly speaking, this product is not that impressive in every aspect, especially in the views of the computer enthusiasts. We have tested every top models of the Haswell desktop, Core i7-4770K, and have been received some disappointed results. First, Core i7-470K is only a bit faster than the top Sandy Bridge’s processor. The updated micro architectural only provides 5-15% better performance, and the clock frequency has no change at all. Secondly, the Core i7-4770K processor is a far hotter processor than any other CPUs before. Even though Haswell allows engineering energy-efficient processors with impressively low heat dissipation, its performance-per-watt has worsened a lot when they adjusted its characteristics to meet the desktop requirements. This is the thing that placed the device as the third dot-point in this list: without extreme cooling Core i7-4770K overclocks less effectively than the previous generation overclocker processors. The particular CPU models that we have tested this time allowing us to conclude that the microprocessors can be over-heated at the clock rate around 4.4 – 4.5 GHz even though it is working under the high performance cooling system. And the fourth thing is: the Haswell microprocessor requires the new LGA 1150 platform, not standing out with any unique advantages, but simply providing the USB 3.0 and SATA 6 Gbps. But at the moment, this platform seems to be very raw and it is still waiting for a breakout in the chipset, which will fix some issues with the USB 3.0 controller.

4th Gen Intel Core i7

4th Gen Intel Core i7

In order to make up for all the above mentioned mistakes, desktop Haswell gives out these following features: support of the new AVX2/FMA3 instructions, which are not yet used by existing software; 30% faster graphics core, and limited overclocking of the processor with a locked clock frequency multiplier. Unfortunately, all these advantages will most likely be useless for enthusiasts. Although, the basic Haswell CPU, from the Core i7 series, for instance, can be quite outstanding because of these features, they are expected to be released a bit late.

At this current stage, we need sum up our review about the Core i3-4770K and the LGA 1150 with a little bit of disappointment. The appearance of the Haswell microarchitecture into the desktop segment seems to be very similar to the Windows 8 establishment. Intel seems to provide something very new and very special, but each advantage the newcomer has to offer is counterbalanced by at least two mistakes, ruining the overall impression and taking away the desire to migrate to fourth generation Core processors. Apparently, Haswell could feel a bit lonely in the laptop segment, but we hope that the next revisions of the microprocessors and the chipsets would encourage the manufacturer to make more improvements to the LGA 1150 platforms and the laptops’ microprocessors in particular.

Technical specs

·         Processor Core: Quad-core (4 Core)

·         Processor Manufacturer: Intel

·         Product Family: Core i7

·         L3 Cache: 8 MB

·         Clock Speed: 3.50 GHz

·         Processor Socket: Socket H3 LGA-1150

·         64-bit Processing: Yes

·         Processor Technology: Virtualization Technology, Enhanced SpeedStep Technology, Turbo Boost Technology 2.0, Hyper-Threading Technology, Extended Memory 64 Technology

·         L1 Cache: 256 KB

·         L2 Cache: 1 MB

·         Product Line: Core i7

·         Process Technology: 22 nm




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