Coffee Lake returns to the bench for its third review, with benchmarks now focusing on the Intel i3-8350K unlocked 4C/4T CPU. The 8350K (on Amazon here) essentially usurps the market of the previous i5-7600K, but is potentially squelched by CFL brethren i5-8400 CPUs, planting the 8350K in the same price/performance positioning as the 7350K in January.

The 7350K was a good idea, but the wrong launch price. Pricing later fell by ~$30 and made more sense, but the initial ~$180 retail availability was far too high to be worthwhile. Now, with the gap between an i5 and an i3 emphasized with 6C i5 CPUs, those differences become more noteworthy. The i5-8400, ignoring the absence of sensible partner boards, is priced at around the same target as the 8350K (+/-$10). Again, assuming you can find any – and assuming retailers can stick to one price. The R5 CPUs are also more appropriate comparisons against the i3-8350K, despite the i3/R3 naming equivalence. In terms of price, the R3s target a completely different market, and are not an appropriate price-to-price comparison for the 8350K.

As a reminder before getting started, we deployed a new testing methodology with Coffee Lake (our 8700K review), and have not yet fully re-populated our CPU charts.

Hardware news for the last week includes discussion on an inadvertent NZXT H700i case unveil (with “machine learning,” apparently), Ryzen/Vega APU, Vega partner card availability, and Coffee Lake availability.

Minor news items include the AMD AGESA 1.0.0.7 update to support Raven Ridge & Pinnacle Ridge, Noctua’s Chromax fans, and some VR news – like Oculus dropping its prices – and the Pimax 8K VR configuration.

Find the video and show notes below:

The Intel i5-8400 review got delayed from initial publication when we figured it’d be worth adding 2666MHz gaming tests. 3200MHz is our standard DDR4 memory speed, providing a solid baseline across Intel and AMD CPUs, but makes less sense for lower-end CPUs with questionable memory speed support. “Questionable” is used here because, as of now, we are not sure whether B/H boards will support only the native memory speed of 2666MHz or higher multipliers. Some board vendors have suggested a possibility of unlocked memory multipliers of 32/36x, but haven’t confirmed, while other sources have suggested a maximum speed of 2666MHz. Because we cannot reasonably confirm either, we decided to just test both, then let the chips fall where they may in 1Q18. That’s the launch period for the B/H boards, as we understand it, and means that the i5-8400 will make much more sense in 1Q18 than now.

As it stands now, the i5-8400 launch seems confused: The only pairing options are Z370 motherboards, which – although cheap ones exist – just don’t make a whole lot of sense for a locked CPU. It’s extra money spent where there need not be extra spend, leaving for a CPU ecosystem that becomes muddied and mismatched. That doesn’t mean the CPU is bad, of course, but it does mean that real-world motherboard pairings of the CPU will likely be far more reasonably priced in a few months.

As has always been the case, including in the i7-8700K review, we are testing with MCE disabled. Our follow-up MCE coverage was not because we had originally tested with it enabled, but because we wanted to demonstrate the performance differences. Anyone capable of reading that piece in its entirety should be aware of that, as the two boards were averaged, though clearly literacy is not always the case – so we’re reiterating it here. MCE off. Plain and simple, as it always has been. We are still using the Ultra Gaming Z370 board.

This episode of Ask GN was filmed a few days ago, but we ended up with so much content (like the H500P review and Vega 64 Strix PCB analysis) that we postponed its publication. The episode tackles popular topics of thermals and thermal testing, which have recently received more public interest, and also covers some top-level discussion of power, thermals, and electricity.

We spend most of the time discussing motherboard differences -- a story we've been harping on since January -- and how different board voltages affect CPUs in different ways. The rest of the intro is spent explaining thermal testing difficulties and challenges, and how we can best normalize for those in review content. The timestamps are below the video embed:

This week's hardware news recap includes some follow-up discussion from our Intel i7-8700K review, primarily focused on addressing incorrect references of thermal testing cross-review/cross-reviewer. We also talk Coffee Lake availability and pricing, as it was unknown at time of finalizing the review, and dive into some of the new Z370 motherboards. EVGA's Z370 FTW and Classified K have both been announced (and we followed-up with EVGA to get pricing information), alongside a new Micro board in Z370 format.

Beyond this, we've got the usual listing of new product announcements and industry news, including USB3.2's specification, headless video cards, Star Citizen 3.0 alpha pushed to Evocati, and AIM's death.

This content piece aims to explain how Turbo Boost works on Intel’s i7-8700K, 8600K, and other Coffee Lake CPUs. This primarily sets forth to highlight what “Multi-Core Enhancement” is, and why you may want to leave it off when using a CPU without overclocking.

Multi-core “enhancement” options are either enabled, disabled, or “auto” in motherboard BIOS, where “auto” has somewhat nebulous behavior, depending on board maker. Enabling multi-core enhancement means that the CPU ignores the Intel spec, instead locking all-core Turbo to the single-core Turbo speeds, which means a few things: (1) Higher voltage is now necessary, and therefore higher power draw and heat; (2) instability can be introduced to the system, as we observed in Blender on the ASUS Maximus X Hero with multi-core enhancement on the 8700K; (3) performance is bolstered in-step with higher all-core Turbo.

Intel’s Coffee Lake CPUs aren’t a hard “response” to Ryzen; the CPUs have been taped-out for a while now, but the response appears to align more with the release timeline and pricing. X299 moved forward to compete with Threadripper, and Coffee Lake received a similar treatment. One thing we won’t know, of course, is whether the pricing is some sort of a response to Ryzen. Intel’s i7-8700K premiere CL CPU carries an MSRP target of $360 1ku, a $10-$20 jump over Kaby Lake 7700K CPUs with fewer cores and similar frequencies. Either way, the i7-8700K is here now, and we’ve got a densely packed review covering most aspects of Coffee Lake.

Our Intel i7-8700K review will focus on delidding, liquid metal application, overclocking, gaming & streaming benchmarks vs. Ryzen, power draw, and production benchmarks. Our i5-8600K review will post separately, as this is dense enough as-is.

This week's hardware news recap covers an Intel document leaked to GN, detailing H370, B360, & other launches, alongside coverage of the Zen+ & Zen 2 launches, AIB partner Vega cards, and memory kit releases. The last bit of coverage shows the new 4500 & 4600MHz memory kits that have primarily emerged from Corsair, though other vendors are following suit with new memory kit launches. GSkill, for instance, is pushing more "Ryzen-ready" memory kits in the RGB line, focusing mostly on the 3200MHz speeds that were largely shipped to reviewers. GeIL is working on RGB memory kits that synchronize with ASUS Aura RGB lighting effects for motherboards and video cards.

As for video card news, we confirmed with MSI that the company presently has limited or no plans for Vega partner model cards. Gigabyte plans to make cards, but the launch date is tenuous -- as is ASUS' launch date, at this point, as both vendors are working out final issues in manufacturing. We'd wager that it's primarily to do with supply availability, though VBIOS + driver challenges also exist.

Intel moved-up its news embargo lift for the new Coffee Lake CPU products (“8th Gen Core” processors) following publication of the entire news announcements on leak websites. The news for today pertains to the product stack specifications – at least, as it’s relevant to our audience – and finalizes official listings and prices for the i7-8700K, i7-8700, i5-8600K, i5-8400, i3-8350K, and i3-8100.

First up, the 1K unit pricing of the Intel i7-8700K, the successor to the i7-7700K, will land at $360. This isn’t too distant from previous Intel 1K unit prices for i7 CPUs, though does creep the price about $10-$20 more than the final street price of the 7700K (near launch, anyway). The pricing here, assuming it does land at around $360 USD in North America, could prove reasonable for the CL CPUs. We’ll find out in testing, and will reach a verdict for the review. In the meantime, though, it seems that the rumored $400+ pricing may not come to fruition.

Product photos and renders for ASRock’s alleged Coffee Lake Z370 motherboards have leaked through Videocardz, detailing the ASRock lineup from top-to-bottom. The reported offering from ASRock includes a Z370 “Killer” motherboard (bearing similar branding to Fatal1ty boards), the Z370 Taichi high-end board, Z370M Pro4 Micro-ATX board, Z370M-ITX AC wireless board, and lower-end Z370 Extreme4 and Pro4 motherboards (both ATX).

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