We’re winding-down coverage of Vega, at this point, but we’ve got a couple more curiosities to explore. This content piece looks at a mix of clock scalability for Vega across a few key clocks (for core and HBM2), and hopes to constrain for a CU difference, to some extent. We obviously can’t fully control down to the shader level (as CUs carry more than just shaders), but we can get close to it. Note that the video content does generally refer to the V56 & V64 difference as one of shaders, but more than shaders are contained in the CUs.
In our initial AMD shader comparison between Vega 56 and Vega 64, we saw nearly identical performance between the cards when clock-matched to roughly 1580~1590MHz core and 945MHz HBM2. We’re now exploring performance across a range of frequency settings, from ~1400MHz core to ~1660MHz core, and from 800MHz HBM2 to ~1050MHz HBM2.
This content piece was originally written and filmed about ten days ago, ready to go live, but we then decided to put a hold on the content and update it. Against initial plans, we ended up flashing V64 VBIOS onto the V56 to give us more voltage headroom for HBM2 clocks, allowing us to get up to 1020MHz easily on V56. There might be room in there for a bit more of an OC, but 1020MHz proved stable on both our V64 and V56 cards, making it easy to test the two comparatively.
Manufacturers apparently read our Dark Base Pro 900 review and took our “truly massive” description as a challenge: the case Thermaltake has sent us is fully plated in 5mm panes of glass, weighing 18.9kg (41.66 lbs) altogether, and we’ve got even heavier ones waiting in line. The Thermaltake View 71 TG is not the Core V71, it’s a whole new product more related to the Corsair 570X that we reviewed: a high-end case designed to push the limits of just how much glass a chassis can hold.
We’re reviewing the Thermaltake View 71 TG with the Corsair 570X alternative in mind, along with the freshly reviewed Be Quiet! Dark Base Pro 900 white edition. As usual, we’re looking at thermals and noise, with some additional testing done on optimal fan configuration with the View 71.
We’ve talked about this in the past, but it’s worth reviving: The reason or keeping motherboard consistency during CPU testing is the inherent variance, particularly when running auto settings. Auto voltage depends on a lookup table that’s built on a per-EFI basis for the motherboards, which means auto VIDs vary between not only motherboard vendors, but between EFI revisions. As voltage changes, power consumption changes – the two are directly related – and so too the wattage changes. As a function of volts and amps, watts consumed by the CPU will increase on motherboards that push more volts to the CPU, regardless of whether the CPU needs that voltage to be stable.
We previously found that Gigabyte’s Gaming 7 Z270 motherboard supplied way too much voltage to the 7700K when in auto settings, something that the company later resolved. The resolution was good enough that we now use the Gaming 7 Z270 for all of our GPU tests, following the fix of auto voltages that were too high.
Today, we’re looking at the impact of motherboards on Intel i9-7960X thermals primarily, though the 7980XE makes some appearances in our liquid metal testing. Unless otherwise noted, a Kraken X62 was used at max fan + pump RPMs.
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.
Running through the entire Skylake X lineup with TIM vs. liquid metal benchmarking means we’ve picked-up some very product-specific experience. Skylake X has a unique substrate composition wherein the upper substrate houses the silicon and some SMDs, with the lower substrate hosting the pads and some traces. This makes delidding unique as well, made easier with Der8auer’s Delide DieMate X (available in the US soon). This tutorial shows how to delid Intel Skylake X CPUs using the DieMate X, then how to apply liquid metal. We won't be covering re-sealing today.
Still, given the $1000-$2000 cost with these CPUs, an error is an expensive one. We’ve put together a tutorial on the delid and liquid metal application process.
Disclaimer: This is done entirely at your own risk. You assume all responsibility for any damage done to CPUs. We will do our best to detail this process so that you can safely follow our steps, and following carefully will minimize risk. Ultimately, the risk exists primarily in (1) applying too much force or failing to level the CPU, both easily solved, or (2) applying liquid metal in a way that shorts components.
No surprise in that headline, really.
Some of this information is rehashed, but has been bulked-up by alleged AMD slides leaked to Informatica Cero. The slides, which are functionally in “rumor” status, indicate AMD’s code-named Matisse processors as launching in 2019. The Matisse CPUs will carry AMD’s Zen 2 architecture, but aim to continue supporting AM4 platforms. Before that launch, AMD’s Zen Plus iteration is targeted for 2018, allegedly, and will exist primarily as an optimization on the existing Ryzen CPUs. This can be thought of as an analog to the retired Intel tick-tock cadence, with Zen Plus likely targeting frequency tuning.
Our 7900X delidding benchmarks weren’t published by coincidence: Today, we’re expanding on our liquid metal vs. Intel TIM testing with the new Intel i9-7960X and i9-7980XE CPUs, the 16C and 18C Skylake-X parts, respectively. These CPUs are Intel’s highest multithreaded performers in this segment, and are priced alongside that status – the 7960X costs $1700, with the 7980XE at $2000.
Rather than focusing entirely on delidding and thermal benchmarks, we’ll also be including power testing and some production benchmarks (Blender, Premiere). This review of the Intel i9-7960X and i9-7980XE will primarily test thermals, power, delidded thermals, liquid metal thermals, rendering benchmarks, and some synthetics.
Recapping the previous test approach for delidding & liquid metal:
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.
There are many reasons that Intel may have opted for TIM with their CPUs, and given that the company hasn’t offered a statement of substance, we really have no exact idea of why different materials are selected. Using TIM could be a matter of cost – as seems to be the default assumption – and spend, it could be an undisclosed engineering challenge to do with yields (with solder), it could be for government or legal grants pertaining to environmental conscientiousness, or related to conflict-free advertisements, or any number of other things. We don’t know. What we do know, and what we can test, is the efficacy of the TIM as opposed to alternatives. Intel’s statement pertaining to usage of TIM on HEDT (or any) CPUs effectively paraphrases as “as this relates to manufacturing process, we do not discuss it.” Intel sees this as a proprietary process, and so the subject matter is sensitive to share.
With an i7-7700K, TIM is perhaps more defensible – it’s certainly cheaper, and that’s a cheaper part. Once we start looking at the 7900X and other CPUs of a similar class, the ability to argue in favor of Dow Corning’s TIM weakens. To the credit of both Intel and Dow Corning, the TIM selected is highly durable to thermal cycling – it’ll last a long time, won’t need replacement, and shouldn’t exhibit any serious cracking or aging issues in any meaningful amount of time. The usable life of the platform will expire prior to the CPU’s operability, in essence.
But that doesn’t mean there aren’t better solutions. Intel has used solder before – there’s precedent for it – and certainly there exist thermal solutions with greater transfer capabilities than what’s used on most of Intel’s CPUs.
MSI is still building GTX 1080 Ti models, it seems. The Pascal 1080 Ti series has to be one of the most prolific AIB partner cards in a long time: EVGA has an insurmountable catalogue, at this point, ASUS and Gigabyte branched-out 1080 Ti units, and MSI is now adding a triple-fan cooler that seems to be taking some of Zotac's style.
The new MSI GTX 1080 Ti Gaming X Trio will join the company's existing line of cards, including the Gaming X, Gaming Z, Lightning X, Lightning Z, Seahawk, et al. The Gaming X Trio switches from "Twin Frozr" to a triple-fan cooler, using two fans of larger size (they look to be 90mm, maybe 100mm) and one of smaller size, located centrally. Unlike some of the competition, all three fans spin in the same direction and use the same blade design, just different sizes.
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