Intel Core i7-8086K 40th Anniversary CPU Review

To mark the anniversary of the primary CPU based mostly on the X86 structure, Intel has launched a restricted version CPU within the Core i7-8086Okay. Though the brand new 8086Okay seems nothing in any respect prefer it’s namesake the Intel 8086, or iAPX 86 because it was additionally recognized, it’s a milestone none the much less marking 40 years of X86 based mostly structure. The 8086 CPU paved the best way for contemporary computing and it’s straightforward to see why Intel would commemorate such an event with a particular version CPU.

Under you’ll see an image of the unique Intel 8086 CPU, as you’ll be able to see trendy CPUs look a lot totally different than this one. These 20 pins are gone and now changed with 1151 contact factors and a pleasant shiny warmth spreader to guard that piece of silicon.

Intel 8086

i7-8086Okay and 8700Okay Prime

i7-8086Okay and 8700Okay Backside

We’ll be evaluating the 8086Okay to the 8700Okay which it’s based mostly on and see what if any efficiency variations there could also be between the 2. As you’ll be able to see from the image above they seem like the precisely the identical on the surface, let’s check out how they carry out and see if that GHz increase provides it a bonus over its sibling.


From the surface, the 8086Okay doesn’t actually look any totally different than the 8700Okay however all of the modifications are on the within. The bottom velocity has been raised to GHz from three.7 GHz whereas nonetheless sustaining its 95 W TDP. Take into account that Intel’s TDP score is taken from the bottom CPU velocity and doesn’t embrace any turbo perform. Taking a look at this they’ve added an additional 300 MHz to their base velocity of the 8700Okay and nonetheless stay inside the similar TDP. Does this point out a barely greater binned CPU?

Turbo increase, that is the place my expectations and actuality began to diverge. Initially when the 8086Okay hit the information, I anticipated a 300 MHz improve throughout the board however sadly, that’s not the case. Intel has raised the bottom clock and prime increase bin by 300 MHz leading to a pleasant improve for the bottom velocity at GHz and a single core increase as much as GHz however the different turbo speeds stay unchanged from the 8700Okay this CPU is predicated on. See the chart under, it breaks down the turbo by cores:

Intel Core i7-8086Okay Vs 8700Okay Turbo GHzfour.6 GHzfour.5 GHzfour.four GHzfour.four GHzfour.three GHz$424.99i7-8700Okayfour.7 GHzfour.6 GHzfour.5 GHzfour.four GHzfour.four GHzfour.three GHzthree.7 GHz$349.99

Check Setup and Outcomes

For comparability testing of the i7-8086Okay, the i7-8700Okay was used. Each CPUs have been run at BIOS defaults with XMP enabled in addition to MCE (multi-core enhancement) enabled, this could give an excellent foundation for comparability of the “out of the box” expertise with the 8086Okay. To chill the CPUs, the EKWB Predator 360 was used which is an excellent 360 mm AIO permitting for max ambient overclocking.

I’ve additionally added outcomes of an all-core four.eight GHz overclock which is concerning the most that would be obtained out of each CPUs utilizing Prime 95 for stability. With out de-lidding, the temperature peaks have been pushing into the 90 °C+ vary which is what restricted the overclock despite the fact that the voltage was nonetheless just one.three V and properly inside the CPU’s tolerance. Sure, the anniversary version 8086Okay nonetheless makes use of paste as TIM beneath the IHS. The 8086Okay was de-lidded afterward to succeed in most potential so the paste is verified.

Check SetupCPUIntel Core i7 8086okay/ Intel Core i7-8700OkayCPU CoolerEK Predator 360 XLCMotherboardASUS ROG Maximus X ApexRAM2 X eight GB Corsair Dominator Platinum RGB DDR4 3600 MHz Cl16Graphics CardASUS ROG GTX 1080Ti Strix OCStorageSamsung 850 Professional M.2 256 GBEnergy ProvideSuperflower Leadex 1 kWWorking SystemHome windows 10 x64 Redstone four

CPU Exams

  • AIDA64 Engineer CPU, FPU, and Reminiscence Checks
  • Cinebench R11.5 and R15
  • HWBot x265 1080p Benchmark
  • POVRay
  • SuperPi 1M/32M
  • WPrime 32M/1024M
  • 7Zip
  • Intel XTU

All CPU checks have been run at their default settings until in any other case famous.

Gaming Checks

All recreation exams have been run at 1920×1080 and 2560×1440 with all CPUs at default settings until in any other case famous. Please see our testing procedures for particulars on in-game settings.

  • 3DMark Hearth Strike Excessive
  • Center Earth: Shadow of Mordor
  • Metro Final Mild
  • Ashes of the Singularity
  • Rise of the Tomb Raider

AIDA64 CPU, FPU, and Reminiscence Checks

One factor to say proper on the outset of this part is the CPUs scored almost equivalent all through all checks. The outcomes can be posted however in all honesty, there isn’t a lot to say about them. The 8086Okay actually is simply an 8700Okay with a bit larger turbo increase on one core, the upper base velocity is basically irrelevant since each CPUs increase all cores to four.three GHz on default settings.

One factor to notice right here is cache velocity, we have now seen prior to now that totally different motherboards, most notably from totally different suppliers will set the cache velocity on the identical CPU at totally different speeds relying on the board. Sometimes that may differ anyplace from 4000-4400 MHz for an 8700Okay when left at AUTO within the BIOS. On the Maximus X APEX at default, the 8700Okay had a cache velocity of GHz, the 8086Okay then again persistently ran the cache at four.5GHz.

Within the AIDA Cache and Reminiscence benchmark photographs under the cache velocity is indicated as north bridge clock. Each these photographs have been taken with the CPUs at default, the 8700Okay studies a cache velocity of 3400 MHz however was truly operating at 4000 MHz, the 8086okay studies 4500 MHz which is the precise velocity at which it ran.


Core i7-8086Okay

Core i7-8700Okay

This development continued all through the testing, even at four.eight GHz the 8086Okay retained the 4500 MHz cache velocity, in the meantime, the 8700Okay routinely bumped its cache velocity to 4300 MHz.

Regardless that the 8086Okay had a slight benefit all through all of the checks it actually wasn’t obvious within the outcomes as you’ll see under.

AIDA64 Cache and Reminiscence Benchmarks

AIDA64 Cache and Reminiscence Benchmark – Uncooked KnowledgeCPULearnWriteCopyLatencyIntel Core i7 8086Okay Defaults51512524294761045.threeIntel Core i7 8700Okay Defaults50507522074680946.eight

Within the reminiscence bandwidth and latency check, the 8086Okay had a slight benefit throughout the board doubtless from the increase in cache velocity however that 500 MHz didn’t actually make that a lot of a distinction within the scores.

AIDA64 CPU Benchmarks

AIDA64 CPU Checks – Uncooked KnowledgeCPUQueenPhotographZLibAESHashIntel Core i7 8086Okay Defaults7230426395576.four293907395Intel Core i7 8700Okay Defaults7232326351575293917395

The outcomes above are very according to one another and nicely inside any margin of error to be referred to as equal.

AIDA64 FPU Benchmarks

AIDA64 FPU Exams – Uncooked KnowledgeCPUVP8JuliaMandelSinJuliaIntel Core i7 8086Okay Defaults671454875295347775Intel Core i7 8700Okay Defaults667754876295347775

Right here once more, the outcomes are so shut, even similar within the final two exams.

Actual World Checks

Subsequent, we’ll transfer on to one thing a bit extra tangible/productivity-based with compression, rendering, and encoding benchmarks.

Cinebench R11.5/R15, POVRay, x265 (HWBot), 7Zip

Cinebench R11.5/R15, POVRay, x265 (HWBot), 7Zip – Uncooked KnowledgeCPUR11.5R15POVRayX2657ZipIntel Core i7 8086Okay Defaults15.2314133016.1746.9640628Intel Core i7 8700Okay Defaults15.three14172991.0847.2640632Intel Core i7 8086Okay four.eight GHz16.9815613343.4251.7543991Intel Core i7 8700Okay four.eight GHz16.9215523347.3152.8944301

Right here once more whether or not at default or overclocked the CPUs rating the identical.

Pi, and Prime Based mostly Checks

Shifting on from all of the multi-threaded goodness above, we get to some Pi and Prime quantity based mostly checks. SuperPi, WPrime, and Intel XTU which is predicated on Prime95.

SuperPi, WPrime, and Intel XTU

SuperPi and wPrime Benchmarks – Uncooked KnowledgeMotherboardSpi 1MSPi 32MWPrime 32MWPrime 1024MIntel XTUIntel Core i7 8086Okay Defaults7.436410.748three.46899.432381Intel Core i7 8700Okay Defaults7.865429.363three.46799.572368Intel Core i7 8086Okay four.eight GHz7.67420.854three.13989.1512609Intel Core i7 8700Okay four.eight GHz7.686421.096three.17189.1652590

Nicely, no actual surprises right here, the one outlier is SuperPi, being a single threaded software it’s one occasion that may reap the benefits of the i7-8086Okay’s single-core GHz increase when operating defaults.

Gaming Outcomes

So far as the gaming checks go, these have been accomplished at resolutions of 1920 x 1080p and 2560 x 1440p in accordance with our Graphics Testing Process which was linked earlier. The CPUs are all at default settings with the 3600 MHz Corsair Dominators and once more one set of outcomes with an all-core overclock to four.eight GHz on each CPUs for comparability.

Up first we’ve got our 1920 x 1080p outcomes as you’ll be able to see it made comparatively no distinction operating the CPU at defaults in comparison with four.eight GHz. Even the quicker cache on the 8086Okay made little to no distinction. The one check it was noticeable with was Ashes of the Singularity which is sort of CPU intensive.

1920 X 1080P Gaming Benchmark Outcomes

Wanting on the 2560 x 1440p benchmarks we see an identical story Metro Final Mild and Shadow of Mordor each noticed some modest positive factors when the CPUs have been at four.eight GHz however for probably the most half, the outcomes are fairly comparable throughout the board.

2560 X 1440p Gaming Benchmark Outcomes

Shifting on to our one artificial gaming benchmark 3DMark’s Firestrike Excessive we’ll see a breakdown of various points of the benchmark. Apart from an general rating these benchmarks additionally escape the graphics scores and physics scores individually.

3DMark Firestrike Excessive

Once more like nearly all of the outcomes all through testing, there’s little or no distinction if any between the 8086Okay and 8700Okay outcomes. Whether or not the CPUs are at default or overclocked they nonetheless rating very shut to one another.

Energy Consumption and Temperatures.

For the subsequent set of outcomes, the CPUs have been examined at defaults as soon as once more. Utilizing AIDA64’s Stability and FPU stability exams together with Prime95 small FFT check the CPUs have been pushed to check energy consumption and most temperatures.

Right here’s the place the 8086Okay and 8700Okay actually appear to vary from one another. The 8086Okay simply seems to be a warmer, extra energy hungry CPU. Even at idle, beneath zero load, the CPU is already pulling an additional 10 W over the 8700Okay and that simply grows because the exams get more durable. Shifting from a 25 W distinction in AIDA64 Stability as much as a full 45 W in Prime95.

Intel Core i7-8086Okay Energy Consumption

The 8086Okay follows the identical development right here because it did above with energy consumption operating persistently hotter than the 8700okay.

Intel Core i7-8086Okay Temperatures


The preliminary overclock of four.eight GHz was examined with Prime 95 Mix check for no less than 60 minutes however each CPUs have been touching 90 °C which is near the higher temperature restrict of 100 °C the place the CPU will begin to throttle its velocity. With a continuing core voltage of 1.three V, each CPUs hit roughly the identical temperatures not like we noticed at default settings.

To go any additional in exploring the complete potential of the i7-8086Okay it was going to have to be de-lidded. With the assistance of a Rockit88 de-lid software, the job was carried out inside minutes. To re-TIM the CPU some Thermal Grizzly Kryonaut paste was used just because liquid metallic isn’t the only option if the CPU might be used with excessive cooling. Though Kryonaut will not be as environment friendly because the liquid metallic it nonetheless did a high-quality job in serving to maintain these temperature spikes to a minimal. The typical temperature was dropped by 6 °C and the most went from 90 °C right down to 74 °C opening up a bit extra room for overclocking.

Core i7-8086Okay Earlier than

Core i7-8086Okay After

To proceed the journey towards greater clocks was going to require extra voltage. By shifting as much as 1.35V a secure overclock was reached at GHz utilizing Prime95 which depends closely on AVX based mostly CPU directions. There’s a purpose most Intel motherboards include the power to set and AVX offset. In contrast to older instruction units AVX actually hammers a CPU with the added work that these directions can deal with on the similar velocity which may restrict the CPUs capabilities. 5.1 GHz was virtually on the desk however cooling ran a bit brief, probably with liquid metallic it might have been reachable however not with the present set-up.

This broke the overclocking session into two elements AVX limits on one hand and non-AVX on the opposite. So following the identical principals as Silicon Lottery would after the AVX portion was nailed down the check was switched to RealBench which makes use of many several types of CPU directions. This took a bit extra time to iron out however in the long run, an overclock of 5.2 GHz was reached with a -2 offset set in BIOS for AVX. The voltage was reaching most limits bearing on 1.44 V sometimes to take care of stability at 5.2 GHz. This was undoubtedly the top of the road for stability testing. This CPU would additionally run Realbench at 5.1 GHz with the identical 1.35 V setting for Prime95 which might maintain the utmost voltage decrease.

General not a nasty end result. For those who put any religion in Silicon Lottery’s statistics this CPU can be within the prime 60% of the 8086Okay CPUs that they had examined so a bit above common. Evaluating this to the 8700Okay outcomes and it’s a special story the place solely the highest 17% of 8700Ks examined have been capable of maintain this velocity.

Core i7-8086Okay GHz 1.35V Prime95

Core i7-8086Okay 5.2 GHz, -2 offset Realbench

To provide an concept of what an AVX offset overclock does in the actual world, underneath many conditions the CPU will run full velocity at 5.2 GHz however within the occasion, it encounters AVX directions the CPU velocity drops to GHz. Under you’ll see an instance of each conditions. Within the first image of Firestrike Excessive look to the highlighted space of the graph within the decrease part the CPU velocity is reported as 5.2 GHz all through the benchmark. Within the second image of HWBot’s X265 benchmark which makes use of AVX directions, the benchmark studies the complete 5.2 GHz velocity however discover the CPUz window under it which reviews the precise velocity of GHz. Proving this overclock with offset is working as it’s meant.

8086Okay 5.2 GHz Firestrike Excessive

8086Okay with -2 offset in HWBot X265

Sometimes we would come with a “Pushing the Limits” part right here however the i7-8086Okay was already at it’s most so far as voltage and temperatures are involved. This might be used as a 24/7 overclock however personally, I might again down 100 MHz with a -1 offset permitting for using considerably much less voltage for 24/7 operation. By doing so the ensuing voltage can be 1.35 V vs. 1.45 V dropping 100 MHz in non-AVX masses could be very insignificant within the huge image and that is a lot simpler on the CPU.

The under assortment of benchmarks was carried out at 5.2 GHz with a -2 offset simply to point out what the efficiency can be if a consumer selected to maintain the system operating with this overclock. As you’ll be able to see there was a big enchancment over the four.eight GHz overclock that was attainable earlier than de-lidding the CPU. De-lidding is a selection and remember that this voids any sort of guarantee Intel might supply. Whatever the assumed high quality of Intel TIM, it’s ok to run the CPU as meant.

Core i7-8086Okay @ 5.2 GHz with -2 offset

Remaining Ideas

40 years of recent computing is one thing to be pleased with and releasing a CPU to mark this milestone is a superb concept. The i7-8086Okay was a really succesful CPU however so is the i7-8700Okay which is its basis. Throughout regular operation although, it’s troublesome to inform the distinction between the 2 as was evident in all of the benchmarks that have been carried out earlier on this evaluation. Each CPUs scored inside a couple of factors of one another and on the uncommon event that the only core GHz increase might be leveraged the 8086Okay got here out forward.

In response to statistics from Silicon Lottery the 8086Okay Overclocked larger than the overwhelming majority of 8700Ks that they examined. If this pattern was bought by them already de-lidded and pre-binned it will seize a pleasant premium over the retail worth. It seems although that a consumer would stand a reasonably good probability of getting a 5.2 GHz CPU by buying an 8086Okay, a 60% probability in accordance with Silicon Lottery.

That brings us to worth, obtainable at for $424.99 you’ll be paying a $75.00 premium to personal certainly one of these restricted version CPUs. What do you get for that premium although, a collector’s version CPU which stands a greater probability of reaching larger clocks than your typical 8700Okay? Is it value it? That depends upon one’s perspective.

Personally, I might spring the additional money and take an opportunity even when, on the finish of the day, all I had was a small piece of pc historical past.

Click on right here to seek out out what this implies.

-Shawn Jennings (Johan45)

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