amazon Intel Core i7-4790K reviews
Core i7-4790K is still based on the Haswell platform, but is refining some of the components that make the new chip have higher clock rates and more dynamic overclocking than the Core i7-4770K.
Design
Core i7-4790K is in the new product line, code-named Devil’s Canyon, launched by Intel to “warm up” the desktop chip market. Basically, Intel’s new chip is based on Haswell microarchitecture with Tri-Gate transistor technology and 22 nm manufacturing process, similar to the Core i7-4770K Test Lab has introduced to readers.
Based on the Haswell platform, the Intel Core i7-4790K still uses the LGA-1150 socket, not only compatible with the Intel 9 series motherboards (Wildcat Point chipset) but also with older motherboards. Lynx Point after BIOS update.
Note from the P55 motherboard chipset onwards, Intel uses only a chip called the Platform Controller Hub (PCH), which is similar to the South Bridge to handle all system connections. Therefore, the fourth and fifth generation Core i processors use DMI 2.0 (Direct Media Interface) for communication with the motherboard components while the integrated graphics interface (Flexible Display Interface) , bring broadband and faster.
The Intel specification sheet shows that the new Core i7-4790K also has four physics cores simultaneously supporting hyper threading so it can handle up to eight simultaneous streams of data. The difference is that all 4 cores of the 4790K can run at the core lock 4.4 GHz due to automatic overclocking technology Turbo Boost; Compared to the Intel Core i7-4770K only two cores running at 3.9 GHz and the remaining two cores lower.
In addition, the Core i7-4790K also includes dual-core x86 cores and x86 cores on the same semiconductor platform, using the same ring bus and shared LLC caches (last level cache or L3 cache). The 4790K’s HD Graphics 4600 graphics also run at 1,250 GHz, similar to the Core i7-4770K.
While using the same Haswell architecture, the Core i7-4790K still has some specific changes that provide better performance per watt of power consumption. In particular, the new Core i7-4790K has a TDP of 88W, slightly higher than the 84W of the 4770K, but it has 15% higher clock rates.
To achieve this, in addition to integrating the power control unit (PCU) inside the chip, similar to the Voltage Regulator circuit on the motherboard, the Core i7-4790K design is Added a capacitor to better control the power usage of the processor cores, ensuring stability and reliability when raising the clock to 4.0 GHz and overclocking.
In addition, Intel engineers use a new generation Polymer thermal polymeric material called NGPTIM (Next-Generation Polymer Thermal Interface Material) which transfers heat from the core inside the processor to the substrate. The external heat sink is faster and more efficient. In fact, with the Corsair Hydro H100i water heater, Test Lab can “pull” all four Core i7-4790K runs stable at 4.8 GHz and complete the set tests, including both tests are 3DMark and PCMark 8.
Performance
Tested with Haswell platform configuration, including Gigabyte GA-Z97X-UD5H-BK, RAM Kingston HyperX Beast 16 GB, bus 2.400 MHz, SSD Corsair Force GS 240 GB and Windows 7 Ultimate sp1.
In addition to benchmarking performance benchmarks and component tests such as PCMark 8, CineBench R11.5 and PCMark 05, Test Lab also uses a number of detailed tests of CPU and GPU computing power. The graphics capabilities of the integrated graphics HD Graphics 4600 at 1280×720 pixel resolution (HD 720p) and 1920×1080 pixels (Full HD).
For reference, Test Lab conducted the test and compared the performance of the two models of the same series Haswell Core i7-4790K and Core i7-4770K. Note that the comparison is for reference only because in fact, the Core i7-4770K runs at 3.9 GHz while the Core i7-4790K has a clock frequency of up to 4.4 GHz.
With the PCMark 8 test, the test configuration scored 4,631 on the Home and 4,000 on the Creative test, up 0.89 percent and 1.45 percent, respectively, compared to the 4770K.
Similar to PCMark 05, multithreaded multi-threaded compression and decryption of data at the same time, compressed, decoded, compressed image files of Core i7-4790K. It is also 2.24 to 5.32% higher than the 4770K in the same test.
It should be noted that both the Haswell Core i7-4790K and Core i7-4770K integrated graphics core HD Graphics 4600 running at the same clock 1,250 GHz. So the scores obtained in the graphics tests of the two samples above are not significantly different. For example, in the 3DMark test, the 4790K scored 8,241 Physics scores, about 2.81% higher, while the overall performance was only about 1.59% higher (8,538 points).
For DiRT 3 and Alien vs Predator , graphics performance of the HD Graphics 4600 enough to play the game on the resolution of 1280×720 pixel graphics quality. However, when pushed up to 1920×1080 pixel, the number of frames per second processing decreased significantly and only at 22.6 fps, meaning that can be played but the phenomenon of jerky (lag) .
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Intel Core i7-4790K: Buy it now
Intel Core i7 4790K / 4 GHz processor: Buy it now
Temperature, power consumption
Evaluate the heat dissipation and power consumption of the test configuration (not including the monitor, CPU running at the default clock) via 3DMark graphics tests, temperature and power system recognition via GPU-z software and Logger Lite in the environment about 27 degrees C.
In no-load mode, the chip temperature fluctuates at 30 degrees Celsius, the power consumption of the test configuration is 37.7 W, calculated on the average. In the 3DMark graphics test, the 4970K measured at 74 degrees Celsius, lower than the 4770K while having nearly equivalent power consumption of about 168 W.
Overclocking capability
As mentioned above, changes in the 4790K design not only have higher clock rates but also have better overclocking capabilities than older 4770K chips. In addition to the default clock frequency, Test Lab also pushes the chip’s rate up to 4.8 GHz and recognizes the parallel processing capabilities associated with compressing and extracting, encrypting and decrypting data and files. PCMark 05 sound or image increases by 17 to 20% compared to running at standard clock.
With the CineBench R11.5 tool, multi-core and single-core CPU tests also increased by 16.7 and 18.3%, respectively, while the overall 3DMark Cloud Gate performance improved by about 8,75%. This is also perfectly consistent with the fact that overclocking is only aimed at the CPU while maintaining the default GPU.
