Yet another Core i7-8700K & i5-8600K review posted ahead of launch

Published: 29th Sep 2017, 10:55 GMT   Comments

Our friends over at Lab501 are ready to share their review of Core i7-8700K and i5-8600K.

Core i7-8700K / 8600K

Since we already saw synthetic benchmarks, I’m only going to share their gaming performance, overclocking, power consumption and temperature measurements. I guess those are the most interesting. But first, let’s look at the system configuration:

Intel Core i5 7600K,
Core i7 7700K

AMD Ryzen 7 1800X,
1700X, 1700,
Ryzen 5 1600X

Intel Core i7 8700K,
Intel Core i5 8600K

Intel Core i9 7900X,
Intel Core i7 7820X,
Intel Core i7 7800X,
Intel Core i5 7460X

MotherboardAorus Z270X Gaming 9AORUS X370 Gaming 5AORUS Z370 Ultra GamingMSI X299 Raider
RAMGSkill TridentZ 16GB DDR4-3200 CL16GSkill TridentZ RGB 32GB DDR4-3200 CL14
CoolingNoctua NH-D15
HDDSamsung SSD 850 Evo 1TB
PSUSeasonic P1200
CaseHSPC Top Deck Station
Room temp28 C
OSWindows 10 Pro x64
Placa videoZotac GTX 1080 AMP Extreme
DriverForceware 384.94 WHQL
MemoryDDR4 3200 16-16-16-36 2T


Starting with overclocking, it appears that reaching 5.0 GHz on both CPUs is not a problem. It does need more voltage, which will make AIO or custom water- cooling mandatory.

Prime 95 – Intel Core i7 8700K – 5000MHz – 1.35v
Cinebench – Intel Core i7 8700K – 5100MHz – 1.4v

SuperPi 1M – Intel Core i7 8700K – 5200MHz – 1.4v
PiFast – Intel Core i7 8700K – 5200MHz – 1.4v

Prime 95 – Intel Core i5 8600K – 5100MHz – 1.34v
Cinebench – Intel Core i5 8600K – 5200MHz – 1.36v

SuperPi 1M – Intel Core i5 8600K – 5300MHz – 1.38v
PiFast – Intel Core i5 8600K – 5300MHz – 1.38v

Gaming performance

The 8700K seems to be slightly faster than 7700K, whereas the 8600K is offering almost identical performance. Lab501 also added 8600K @ 5.1 GHz here demonstrating true Coffelake-S potential.

Power Consumption

Based on Lab501 tests the 8700K is much, much better option than I7-7800X. The power consumption is comparable to Ryzen 7 1700, which is around 25W higher than 7700K. Overclocking 8600K to 5.1 GHz makes it really power hungry, it needs almost 70W more.

CPU temperature

In this test, the 8700K is around 5C hotter than 7700K. Meanwhile, the 8600K has the same temperature as 7700K.

Source: Lab501

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