Intel Core i7-8700K Review

Intel Core i7-8700K – Day-old coffee, or freshly brewed espresso?

IT’S BEEN ONE HELL OF A YEAR for processor launches: Kaby Lake, Ryzen, Thread Ripper, Skylake-X, Kaby Lake-X, and now Coffee Lake as well. That’s six different SKUs in less time than it takes to spit, each housing a plethora of fantastic advances for the computing enthusiast. It’s hard to deny just how much of an effect AMD’s Ryzen has had on the industry. Intel, in particular, has upped its game in response to the multithreaded prowess of the red core. And that response has come in two forms: Skylake-X to combat Thread Ripper at the high end, and Coffee Lake to take the fight back to the mid-range.

So, then, what’s so different? To be honest, not a lot. Coffee Lake’s architecture isn’t very different from its Kaby Lake predecessor—it’s more a refinement of that architecture, which is, in itself, a refinement of Skylake. The big difference lies in core count. Intel has reshuffled both core and thread counts across its range. The Core i7-8700K features 6 cores and 12 threads, the Core i5 has six cores and six threads, the Core i3 comes with four cores and four threads, and (if the rumors are to be believed) the Pentium has just two cores and four threads.

It’s still shy of the eight cores found on AMD’s Ryzen 7 1800X. However, Intel is banking on its outstanding single-core performance, memory support, established platform, and competitive pricing to level the playing field. And they certainly do.

The Core i7-8700K is impressive. Although architecturally identical to its predecessor, both its synthetic and real-world benchmark performance is exceptional. Scoring 1,553 points in Cinebench R15 puts it just 60 points behind the Ryzen 7 1800X. The big difference, though, lies in that single-core performance, as expected—the 8700K comes in at 205 points, versus Ryzen’s 159. This also translates in-game, because it scores higher than any of the processors we’ve tested in the last year.

And there’s the clincher: Intel’s core architecture is a well-established platform. Whether it’s memory support, in- game performance, or platform reliability, it just all works. There are caveats to this “more cores” approach, however. We’ve seen power draw increase by over 88W under load, compared to the last-gen Core i7-7700K, even drawing 10W more than Ryzen’s 1800X, and temperatures are elevated, too. Under our 280mm AIO, temps easily hit 70 C or more at stock.

It’s a well-established fact at this point that Intel still refuses to solder the IHS to the dies of its CPUs, leading to higher temperatures overall. It’s disappointing, although the Ryzen parts aren’t exactly chilled chips, either. Adjusting the manufacturing process to go back to that

Sandy Bridge-style of solder would have alleviated these temperature issues, and allowed for beefier stock clocks on the majority of its parts, without necessarily losing out on stability, potentially enabling team blue to surpass AMD’s Ryzen flagship with little risk.

Because of that, the overclocking is equally not as stellar an experience. Although we managed to get our chip up to 5.2GHz (maximum true turbo sticks resolutely at 3.7GHz), both temperature and stability held us back from going any further. Again, we’re at that point where the only solution would be to delid the processor to take it higher, something not exactly enticing for the average user.

The Core i7-8700K is an impressive retaliatory blow to AMD’s Ryzen. It comes at an attractive price, on an already well- established platform, and unless AMD can really drop the price points on its Ryzen components, it makes far more sense for everyday upgraders to opt for team blue over team red, at least until Ryzen 2 arrives next year. -zak storey

Intel Core i7-8700K


  • Swift response from Intel
  • Versatile chip
  • Cost-effective


  • Temperatures high on launch
  • Little change except core count



Intel Core i7-8700K AMD Ryzen 7 1800X Intel Core i7-7700K
X265 Benchmark (fps) 30.65 27.89 20.68
Cinebench R15 Single (Index) 205 159 194
Cinebench R15 Multi (Index) 1.553 1,612 970
Fry Render (Seconds) 133 161 225
AIDA64 Memory Latency (ns) 48 98 44
Total War: Atilla (fps) 41 39 41
Far Cry Primal (fps) 77 75 77
3DMark: Fire Strike (Index) 18,879 16,433 17.948
Power Draw Idle (Watts) 65 56 44
Power Draw Load (Watts) 198 182 110

Best scores are in bold. Our test bed consists of an Asus Z370 Maximus X Hero. 16GB (2x 8GB) of Corsair Dominator Platinum DDR4, an Nvidia GeForce GTX 1080, and a Samsung 850 Evo 500GB SSD. All games were tested at 1440p on the highest graphical profile.


Base Clock 3.7GHz
Turbo Clock 4.7GHz
Cores 6
Threads 12
Lithography 14nm
Cache 12MB
Memory Support DDR4-2666
Memory Channels Dual
Max PCIe Lanes 16
Graphics Intel UHD Graphics 630
Graphics Clock 350MHz

A knee-jerk reaction maybe, but it’s certainly effective.

8 Total Score
Intel Core i7-8700K Review

  • Swift response from Intel
  • Versatile chip
  • Cost-effective
  • Temperatures high on launch
  • Little change except core count
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