The Intel Core i7-8086K Review
by Ian Cutress on June 11, 2018 8:00 AM EST- Posted in
- CPUs
- Intel
- Core i7
- Anniversary
- Coffee Lake
- i7-8086K
- 5 GHz
- 8086K
- 5.0 GHz
Overclocking Performance: CPU Tests
In the third page of the review we showed our overclocking results, with our CPU managing to hit 5.1 GHz stable with a sizeable increase in voltage. Running at 5.1 GHz incurred rather high temperatures however, so for our benchmark suite we dialed back to 5.0 GHz and run a number of our tests again at this fast speed. We also ran some benchmarks at stock frequency but with increased DRAM frequencies. We ran the DRAM in our ASRock provided system at DDR4-3466, slightly overclocked beyond its DDR4-3200 sticker value.
For this page (and the next), we’ll show the overclocked results of the Core i7-8086K using the fast memory kits as well as the 5.0 GHz overclocked setting (at base memory). The Core i7-8700K numbers are also included for reference.
FCAT Processing
3DPM v2.1
Dolphin v5
DigiCortex v1.20
Blender
POV-Ray
Cinebench R15 ST
Cinebench R15 MT
7-zip
TrueCrypt
GeekBench 4 ST
GeekBench 4 MT
For everything except the most lightly threaded workloads, overclocking the 8086K to a flat-out 5GHz shows some reasonable gains. These results aren't you couldn't already extrapolate based on the clockspeeds, but it's nice to put theory to practice. It also highlights the unfortunate shortcoming of the CPU: being able to turbo one thread to 5GHz just isn't that useful, since you'll very rarely have a complete system workload that allows it, even if the heaviest workload is single-threaded. The 8086K simply begs to be run at a flat-out 5GHz to get the most out of its capabilities.
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mkaibear - Tuesday, June 12, 2018 - link
"Total flop"I suggest benchmarking the CPU in your phone against this CPU and try again.
SanX - Tuesday, June 12, 2018 - link
They mostly serve different purposes and apps and have different TDP. But if you restrict consumption power of Intel processors to the same one of mobile processors then in the same apps it's not clear in advance which one will win.Time for ARM to look at the server and supercomputers markets.
iranterres - Monday, June 11, 2018 - link
HAHA. Intel once again trying to fool some people and appeasing the fanboys with something worthless and expensive.xchaotic - Tuesday, June 12, 2018 - link
So are the regular i7-8600K unable to run all core 5GHz? If so, what't the max stable freq for a non-binned i7-8600K? Personally I went for an even lower/cheaper i5-8400 CPU, but I see why some people prefer to be running max speed all the time...Rudde - Tuesday, June 12, 2018 - link
I assume you mean the i7-8700k.There is a phenomenon called 'the silicon lottery.' Basically, when you buy an i7-8700k, you can't know the max stable frequency. It could max out at 5.2GHz or it could only reach 4.7GHz before going unstable. The thing is, you can't know what you'll end up with.
This brings us to the i7-8068k. The i7-8068k is pretty much guaranteed to have a max stable frequency above 5GHz. Of course, this matters only when overclocking.
Bradyb00 - Tuesday, June 12, 2018 - link
Is it a lower temp than a 8700k for a given multiplier though? i.e. both 8700k and 8086k at 46x which is cooler? 8700k obviously has to be averaged as not everyone is lucky with the silicon lottery.Presumption is the 8086k will run cooler on average due to the better binning.
In which case I'm happy to pay more to save some degrees in my wee itx build
Lolimaster - Tuesday, June 12, 2018 - link
Why not simply pick the Ryzen 5 2600, same thing with actual lower temps from using high quality solder...$189
TheinsanegamerN - Monday, June 18, 2018 - link
Depends on the use case. For pure gaming, I'd stick with intel, which is a bit faster now and, if history is any indication, will hold up a LOT better for gaming in 5 years then the AMD chip will.Especially if you run games or emulators dependent on IPC (like PCSX2) the intel chip will perform a lot better then the AMD chip.
There is also the memory controller. Ryzen 2000 improved, but intel's controller is still superior, and that matters for things like RTS games that consume memory bandwidth like black holes consume stars.
Stuka87 - Tuesday, June 12, 2018 - link
Props to Asrock for providing the system so that you could get us stuff so quickly Ian. Not sure why everybody is complaining about the system and cooling that was used. The system was loaned to you so that you could get us numbers fast, which personally I am happy about. Thanks for your hard work Ian!El Sama - Tuesday, June 12, 2018 - link
This is quite the premium cost for a small increase in frequency that should be close to what you get to a 8700k OCed, an interesting offering regardless.