Buildzoid of “Actually Hardcore Overclocking” joined us to discuss the new EVGA GTX 1080 FTW PCB, as found on the Hybrid that we reviewed days ago. The PCB analysis goes into the power staging, and spends a few minutes explaining the 10-phase VRM, which is really a doubled 5-phase VRM. Amperage supported by the VRM and demanded by the GPU are also discussed, for folks curious about the power delivery capabilities of the FTW PCB, and so is the memory power staging.
If you're curious about the thermal solution of the EVGA FTW Hybrid, check out the review (page 1 & 3) for that. EVGA is somewhat uniquely cooling the VRAM by sinking it to a copper plate, then attaching that to the CLC coldplate. We say “somewhat” because Gigabyte also does this, and we hope to look at their unit soon.
We're finally reviewing the real EVGA GTX 1080 Hybrid ($730), having built our own several months ago by using a liquid cooling kit. The EVGA version, though, is more official – and it's also using an FTW custom PCB rather than the 5-phase reference board we relied upon. The FTW Hybrid has better power management and delivery, in theory, alongside a far more advanced cooling solution than we instituted on our own DIY Hybrid.
In this review, we'll primarily and most heavily be focusing on thermals between the Sea Hawk X and the EVGA 1080 FTW Hybrid, but will also look at FPS and overclocking performance. Noise and power testing are additionally available, along with some unique Boost functionality discussion.
The review is forthcoming – within a few hours – but we decided to tear-down EVGA's GTX 1080 FTW Hybrid ahead of the final review. The card is more advanced in its PCB and cooling solution than what we saw in the Corsair Hydro GFX / MSI Sea Hawk X tear-down, primarily because EVGA is deploying a Gigabyte-like coldplate that conducts thermals from the VRAM and to the CLC coldplate. It's an interesting fusion of cooling solutions, and one which makes GPU temperatures look higher than seems reasonable on the surface – prompting the tear-down – but is actually cooling multiple devices.
Anyway, here's a video of the tear-down process – photos to follow.
The EVGA Hybrid closed-loop liquid cooler has been the center of attention for a few of our DIY “Hybrid” mods, and for good reason: It was the best-performing CLC for GPUs that we tested last year, largely due to the protrusion in the coldplate and the dense microfins. The EVGA Hybrid cooler ($100) uses Asetek's supply, so we resurrected our old Corsair H100 (torn apart years ago) to compare a Generation 3 Asetek cooler to the new generation on EVGA's unit. You'll see that the setup is largely the same, though.
The EVGA Hybrid cooler we're tearing down today accompanies the GTX 980 Ti Hybrid, 970 Hybrid, and the forthcoming 1080 Hybrid. We managed to drop thermals of the GTX 1080 down to 18C (delta T over ambient) from ~57C by mounting an EVGA Hybrid cooler to the card, and even got an extra 100MHz out of our OC. Let's look at why that was the case.
EVGA's GTX 1070 SC introduces the company's ACX 3.0 air cooler, an update we detailed in our Computex coverage of EVGA's GTX 1080 FTW, Hybrid, and Classified cards. The 1070 SC is part of EVGA's “SuperClocked” family, which is the most affordable pre-overclocked card that the company sells. The vertical will likely later add an SSC card, or Super SuperClocked, with non-OC cards falling below SC in price. The GTX 1070 SC has an MSRP of $440, or $10 below the $450 Founders Edition that we reviewed, and is one of EVGA's first 1070s to market.
This review of the EVGA GTX 1070 SC looks at thermals, FPS, noise, and overclocking. We compare the EVGA 1070 SC vs. the MSI GTX 1070 Gaming X and NVIDIA GTX 1070 Founders Edition cards.
Rounding-out our Best Of coverage from Computex 2016 – and being written from a plane over the Pacific – we're back to recap some of the major GTX 1080 AIB cards from the show. AMD's RX480 was only just announced at Computex, and so board partner versions are not yet ready (and weren't present), and the GTX 1070 only had one card present. For that reason, we're focusing the recap on GTX 1080 GP104-400 video cards from AIB partners.
Until a point at which all of these cards have been properly in our hands for review in the lab, we'd recommend holding off on purchases – but we're getting there. We've already looked at the GTX 1080 reference card (“Founders Edition,” by new nomenclature) and built our own GTX 1080 Hybrid. The rest will be arriving soon enough.
For now, though, here's a round-up of the EVGA, ASUS, Gigabyte, and MSI AIB GTX 1080s at Computex. You can read/watch for more individualized info at each of these links:
Computex has been an unrelenting wave of AIB partner versions of the GTX 1080, with (thus far) one non-reference GTX 1070 in the mix. We've already looked at options from MSI and ASUS, and are now shifting focus to EVGA.
EVGA's Computex line-up most immediately fronted the GTX 1080 Classified, followed by the 1080 Hybrid, 1080 FTW, 1080 SC, and GTX 1070 SC. The cards with ACX coolers – like the SC cards – have now moved to ACX 3.0, which makes a number of small-but-noteworthy changes to cooling design. Fan blades are now slightly thicker than on ACX 2.0, which (we're told) reduces noise levels by way of reducing turbulence and vibration. The ACX 3.0 cooler sticks to its round, copper heatpipes, but modifies them by filling in corners (where gaps between the heatpipe and heatsink exist) with copper.
The test results are in from our post-review DIY project, which started here. Our goal was a simple one: As a bit of a decompression project after our 9000-word analysis of nVidia's GeForce GTX 1080 Founders Edition, we decided to tear-down the GTX 1080, look underneath, and throw a liquid block onto the exposed die. The “Founders Edition” of the GTX 1080 is effectively a reference model, and as such, it'll quickly be outranked by AIB partner cards with regard to cooling and OC potential. The GTX 1080 overclocks reasonably well – we were hitting ~2025-2050MHz with the FE model – but it still feels limited. That limitation is a mix of power limit and thermal throttling.
Our testing discovered that thermal throttles occur at precisely 82C. Each time the card hits 82C absolute, the clock-rate dips and produces a marginal impact to frametimes and framerate. We also encountered clock-rate stability issues over long burn-in periods, and would have had to further step-down the OC to accommodate the 82C threshold. Even when configuring the VRM blower fan to 100% speed, limitations were encountered – but it did perform better, just with the noise levels of a server fan (~60dB, in our tests). That's not really acceptable for a real-world use case. Liquid will bring down noise levels, help sustain higher clock-rates at those noise levels, and keep thermals well under control.
The video (Part 3) is below. This article will cover the results of our DIY liquid-cooled GTX 1080 'Hybrid' vs. the Founders Edition card, including temperatures, VRM fan RPM, overclocking, stability, and FPS. Our clocks vs. time charts are the most interesting.
We're building our own GTX 1080 Hybrid. We're impatient, and the potential for further improved clock-rate stability – not that the 1080 isn't already impressively stable – has drawn us toward a DIY solution. For this GTX 1080 liquid cooling mod, we're tearing apart $1300 worth of video cards: (1) the EVGA GTX 980 Ti Hybrid, which long held our Best of Bench award, is being sacrificed to the Pascal gods, and (2) the GTX 1080 Founders Edition shall be torn asunder, subjected to the whims of screwdrivers and liquid cooling.
Here's the deal: We ran a thermal throttle analysis in our 9000-word review of the GTX 1080 (read it!). We discovered that, like Maxwell before it, consumer Pascal seems to throttle its frequency as temperatures reach and exceed ~82C. Each hit at 82C triggered a frequency fluctuation of ~30~70MHz, enough to create a marginal hit to frametimes. This only happened a few times through our first endurance test, but we've conducted more – this time with overclocks applied – to see if there's ever a point at which the throttling goes from “welcomed safety check” to something less desirable.
Turns out, the thermal throttling impacts our overclocks, and it's limited the potential of a GPU that's otherwise a strong overclocker. And so begins Part 1 of our DIY GTX 1080 build log – disassembly; we're taking apart the GTX 1080, tearing it down to the bones for a closer look inside.
One of our most commonly received Ask GN questions is “which video card manufacturer is 'the best?'” (scare quotes added). The truth of the matter is, as we've often said, they're all similar in the most critical matter – the GPU is the same. If MSI sells an R9 380X and PowerColor sells an R9 380X, they're both using the same GPU (Tonga) and silicon; core performance will be nearly identical. The same is true for the GTX cards – EVGA and PNY both sell GTX 960 video cards, and all of their models implement the same GM206 GPU. The differences are generally rooted in pre-overclocking, cooling units, support and warranties, and aesthetics.
All our content combined, we've spent hours and tens of thousands of words talking about which video cards perform the best in various categories. That's great -- but sometimes it's fun to do something different. This video allows each GPU manufacturer one minute to explain who makes the best graphics cards for gaming. It's a speed-round, to be sure.
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