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 Motherboard Aorus Z270X Gaming 9 AORUS X370 Gaming 5 AORUS Z370 Ultra Gaming MSI X299 Raider RAM GSkill TridentZ 16GB DDR4-3200 CL16 GSkill TridentZ RGB 32GB DDR4-3200 CL14 Cooling Noctua NH-D15 HDD Samsung SSD 850 Evo 1TB PSU Seasonic P1200 Case HSPC Top Deck Station Room temp 28 C OS Windows 10 Pro x64 Placa video Zotac GTX 1080 AMP Extreme Driver Forceware 384.94 WHQL Memory DDR4 3200 16-16-16-36 2T

Overclocking

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