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Intel Core i5-8400


Introduction, 8th Generation Platform Chipset

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So most has happened this year in a desktop-PC CPU market, it’s removing formidable to paint even a extended strokes yet a billboard-size canvas. The thumbnail version? More cores (and some-more threads) for your CPU dollar, a some-more into 2017 we get.

AMD kicked off a trend with a eight-core Ryzen 7 chips in March, commanding out on that height with the Ryzen 7 1800XRyzen 5 1600XAMD Ryzen 3 1300XCore i9-7980XE Extreme Edtion. That $1,999 mega-chip done AMD’s competing counterpart, a 16-core Ryzen Threadripper 1950XIntel’s 8th Generation Core U-Series mobile chips. Those were customarily starting to drip out into slim laptops and convertibles when we wrote this, earnest quad-core opening in systems that formerly had been offering only with dual-core silicon. For a deeper contention of 2017’s developments in desktop CPUs, greatfully see a new reviews of the Intel Core i9-7900XAMD Ryzen Threadripper 1920XComponent Reviews chronology page and nosh on the 20 other desktop processor reviews we’ve created this year, starting with the Intel Core i7-7700KCore i7-8700K flagship, that we tested alongside a Core i5-8400 we’re focusing on here. You’ll be full snacking before we run out of chips.

Intel Core i5-8400 (In Hand Front)

Back and all hold up? It’s time to take a demeanour during a initial of Intel’s 8th Generation Core desktop processors, a family code-named “Coffee Lake” (technically, “Coffee Lake-S,” to set it detached as a desktop-specific silicon).

Much like a company’s initial 8th Generation mobile chips, a Core i5-8400 that we’re looking during here, as good as a Core i7-8700K that we tested in tandem with a new Core i5, are built on essentially the same pattern as a 7th Generation Core “Kaby Lake” processors (which were, in turn, unequivocally identical to a 6th Generation Core “Skylake” chips, like that family’s unlocked-for-overclocking Core i5 chip, the Core i5-6600K). Aside from some additional hardware that supports copy-protected 4K streaming for services such as Netflix (which came in with a Kaby Lake chips), a simple pattern opposite these 3 generations is scarcely a same, by Intel’s possess admission.

To be clearer about that aspect, a new 8th Generation chips are once again built around a 14-nanometer (nm) production process, yet Intel dubs a polished routine used with a latest chips “14nm++.” Chips such as a Core i5-6600K (6th Generation/Skylake) were a company’s initial 14nm parts, while CPUs like a Core i7-7700K (7th Generation/Kaby Lake) are built on a 14nm+ process. So hence, with this third iteration of a 14nm process, we arrive during 14nm++.

There are no 10nm chips to be found here, yet those are a future. But since of this serve excellence of Intel’s production process, Intel has been means to holder adult a limit “boost” time speeds as high as 4.7GHz for a Core i7-8700K. As for a Core i5-8400, a bottom time drops down somewhat to 2.8GHz, compared to a 3GHz bottom of a Core i5-7400 it’s effectively replacing. But a tip Turbo Boost time with a new chip is an even 4GHz—500MHz aloft than a 3.5GHz on a previous-generation Core i5.

That’s customarily one series estimable of note. Another? The rated thermal pattern energy (TDP, a dimensions of heat-dissipation requirements) sticks to 65 watts. That’s doubly considerable when we cruise a Core i5-8400 is a six-core chip, while previous-generation Core i5 desktop processors in this category have been quad-core parts.

Intel Core i5-8400 (Bench Right)

The higher-end Core i7-8700K has six cores and 12 threads, while a Core i5-8400 also has 6 cores, yet customarily six threads. (It lacks Intel’s thread-doubling Hyper-Threading record that lets a core hoop dual estimate threads during one time.) That means, in speculation during least, that these new chips are means of adult to a 50 percent opening boost in tasks that are means to take advantage of all accessible cores. And single-threaded opening (where Intel has prolonged hold a healthy lead) should be aloft as well, interjection to a increasing boost-clock speeds on these chips.

So most for Intel contra Intel; how about AMD?

Can Intel’s new six-core Core i5 broach a products opposite likewise labelled AMD Ryzen 5 chips that have 6 cores and 12 threads? AMD’s chips are all unbarred for overclocking, mind you, while a Core i5-8400 isn’t. And does Intel’s new on-chip integrated graphics solution, dubbed Intel UHD Graphics 630, also yield a poignant speed boost contra a previous-generation integrated graphics processor (IGP)? To find out, of course, we’ll have to excavate low into a benchmark testing. But first, we’ll take a demeanour during a 8th Generation Core height as a whole, that includes 6 new chips during this stage, and a new Z370 chipset.

When we contend “new chipset,” that means you’ll need a new motherboard to take advantage of Intel’s Coffee Lake-S desktop processors. Are Intel’s new chips value a pricey, difficult upgrade? And what about gaming opening with a dedicated graphics card? We’ll try to answer all those questions and some-more below.


Ryzen 5 1600X was one of a favorites in a initial Ryzen lineup.) The Ryzen 5 CPUs contest with Intel’s four-core (four-thread) Core i5 chips like a Core i5-7600K, or this new one.

Intel Core 8th Generation Core i5 and Core i7

Clearly, Intel was going to have to offer adult a response to AMD’s higher-core-count Ryzen chips during some point, and these Coffee Lake chips are arguably a initial salvo. While we’re looking during a six-core, six-thread Core i5-8400 here, we also tested a six-core, 12-thread Core i7-8700K at a same time. But these aren’t a customarily new chips Intel is rolling out in this update. There are 6 chips in sum in a new 8th Generation Core family (for now). Here’s a outline of their specs, approach from Intel…

Intel 8th Generation Core (Chips Specs)

There’s copiousness to take in from a picture above. For starters, a Core i7-8700K is labelled about $20 aloft than a launch cost of a Core i7-7700K that it’s replacing. But a Core i5-8400 is labelled about a same as a stream going rate for a previous-generation Core i5-7400. That’s flattering honeyed deliberation you’re removing 50 percent some-more cores for a same CPU budget. 

Aside from additional cores and time speed adjustments, other additions with these new chips embody some-more sum cache (pretty most expected, given a additional cores via a lineup), and a strike adult in strictly upheld RAM speeds (to 2,666MHz, with a Core i5 and i7 chips). Note, though, that Intel has prolonged been regressive with a rated RAM support. Memory makers have offering kits with higher-than-spec RAM speeds for years. Indeed, a G.Skill Trident Z memory we used for a contrast is rated to 3,600MHz, and it ran during that environment customarily glorious during a testing.



8th Generation Platform Z370 Chipset

As for a height as a whole, there’s not a whole lot (or most during all, really) that’s new, over a new chips and a new chipset. Here’s how Intel laid out a sum in a press materials…

Intel 8th Generation Core (Platform Overview)

To be clear, a 8th Generation Core chips dump into a same LGA 1151 hollow that was used for 6th and 7th Generation chips. But yet a hollow is made a same as before (and is concordant with a same cooling solutions), Intel says you’ll need a new Z370-chipset-based motherboard to use one of a new 8th Generation chips. And we can’t put one of a comparison Skylake or Kaby Lake chips in a new Z370-based motherboards, either.

The reason, according to Intel, is that a association had to beef adult a power-delivery electronics for a additional cores in a new chips. While there might good be electrical and thermal reasons that obligate new motherboards (even yet TDP ratings haven’t altered much), it’s no satisfaction for those who recently bought a now previous-generation Z270 motherboard and would like to ascent to one of these new chips. Given that Z270 customarily strictly launched alongside a Core i7-7700K in Jan of 2017, a life cycle of a 7th Generation desktop chips and their concomitant height seems rigourously short. Not that comparison chips and play will be disintegrating overnight, yet desktop platforms and their concomitant chipsets/motherboards customarily have a longer shelf life than customarily 9 months before being relegated to last-generation status. No doubt, copiousness of consumers who bought a new Z270 motherboard this past open or summer will be unhappy to learn how their new house unexpected becomes a dead-end height in a same year.

For serve sum about a new Z370 chipset and 8th Generation Core platform, we’ll indicate we to a examination of a Core i7-8700K. But sufficient it to contend here that, unless house makers find new and novel facilities to supplement to a play built for these chips, we shouldn’t design any new facilities of piece during a core-chipset turn by stepping adult to a complement formed around one of these chips. Overclocking might be softened slightly, yet if you’re opting for this not-unlocked Core i5, we aren’t going to be overclocking, anyway.

On to a opening benchmarks, where we’ll see a Core i5-8400 can’t always best competing Ryzen chips on rarely threaded workloads. (Six cores, 6 threads contra 6 cores, 12 threads creates it tough.) But when interconnected with a Nvidia GeForce GTX 1080 Founders Edition video label we used for diversion testing, this Core i5 is an glorious performer for a money, delivering significantly aloft support rates than any of AMD’s Ryzen chips during 1080p (1,920×1,080 resolution).

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