Hardware news headlines with AMD's delay of the 3950X and the 7nm shortage that TSMC is experiencing. The shortage, it seems, is one of those "good problems" to have -- TSMC's 7nm process is so popular that it's struggling to keep up with demand, and so the fab is working to increase wafer output. Separately, news talks issues with iCUE software causing impact to FPS, somewhat unsurprisingly, in coincidental timing with the 465X iCUE launch.
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Other than announcing our upcoming collaborative stream with overclocker Joe Stepongzi (Bearded Hardware), we're also talking Threadripper specification leaks, 6000MHz memory overclocking, RDNA 2 and Zen 3 roadmap information, and smaller items. For us, though, we're excited to announce that we're streaming some liquid nitrogen extreme overclocks with AMD parts this weekend. We haven't run both the 5700 XT and 3900X under liquid nitrogen at the same time, so we'll be doing that on Sunday (9/15) at 1PM Eastern Time (NYC time). On Saturday (9/14), we'll be streaming the efforts to overclock just the 3900X under liquid nitrogen. Joe Stepongzi, pro overclocker with a decade of experience in the 'sport,' will be joining us to help run the show.
This hardware news episode mostly focuses on alleged Threadripper documentation that we received through a leak, including discussion of the sTRX4 and sWRX8 processors that are listed in said document. The "4" and "8" are indicative of memory channel count, though we don't fully know what name or release date AMD intends to give these CPUs. AMD's Threadripper 3000 series CPUs will be competing with Intel in HEDT, where Intel is presently focusing effort for its next major release cycle. Beyond the Threadripper discussion, we also talk about Intel and AMD bickering with each other like children (I'll turn this car around right now!), Der8auer's survey, USB4 spec, and the Steam Hardware Survey.
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Memory speed on Ryzen has always been a hot subject, with AMD’s 1000 and 2000 series CPUs responding favorably to fast memory while at the same time having difficulty getting past 3200MHz in Gen1. The new Ryzen 3000 chips officially support memory speeds up to 3200MHz and can reliably run kits up to 3600MHz, with extreme overclocks up to 5100MHz. For most people, this type of clock isn’t achievable, but frequencies in the range of 3200 to 4000MHz are done relatively easily, but then looser timings become a concern. Today, we’re benchmarking various memory kits at XMP settings, with Ryzen memory DRAM calculator, and with manual override overclocking. We’ll look at the trade-off of higher frequencies versus tighter timings to help establish the best memory solutions for Ryzen.
One of the biggest points to remember during all of this -- and any other memory testing published by other outlets -- is that motherboard matters almost more than the memory kit itself. Motherboards are responsible for most of the timings auto configured on memory kits, even when using XMP, as XMP can only store so much data per kit. The rest, including unsurfaced timings that the user never sees, are done during memory training by the motherboard. Motherboard manufacturers maintain a QVL (Qualified Vendor List) of kits tested and approved on each board, and we strongly encourage system builders to check these lists rather than just buying a random kit of memory. Motherboard makers will even tune timings for some kits, so there’s potentially a lot of performance lost by using mismatched boards and memory.
This week's hardware news has a litigation theme, including battles between GlobalFoundries and TSMC and AMD and the public. In the former, it's a fight over intellectual property and alleged infringements; in the latter, it's been resolved, and buyers of the Bulldozer CPUs affected can lay claim to $35 (unless a lot of people claim it, in which case it'll dilute further). Beyond that, we'll be talking RX 5700 stock, sales numbers, and Intel's banter with AMD.
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Hardware news this week is largely focused on new product launches, or rumors thereof, with additional coverage of Intel's plans to launch 10nm Ice Lake CPUs in some capacity (for real, this time) by end of year. The XFX RX 5700 XT "THICC" was leaked -- yes, that's a real name -- and it's accompanied by other partner model cards coming out in the next week.
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This is a quick and straightforward piece inspired by a Reddit post from about a week ago. The reddit post was itself a response to a video where a YouTuber claimed to be lowering temperatures and boosting performance on Ryzen 3000 CPUs by lowering the vcore value in BIOS; we never did catch the video, as it has since been retracted and followed-up by the creator and community with new information. Even though the original content was too good to be true, it was still based on a completely valid idea -- lowering voltage, 50% of the equation for power -- will theoretically reduce thermals and power load. The content ended up indirectly demonstrating some unique AMD Ryzen 3000 behaviors that we thought worth testing for ourselves. In this video, we’ll demonstrate how to know when undervolting is working versus not working, talk about the gains or losses, and get some hard numbers for the Master and Godlike motherboards.
In some ways, AMD has become NVIDIA, and it’s not necessarily a bad thing. The way new Ryzen CPUs scale is behaviorally similar to the way GPU Boost 4.0 scales on GPUs, where simply lowering the silicon operating temperature will directly affect performance and clock speeds. Under complete, full stock settings, a CPU running colder will actually boost higher now; alternatively, if you’re a glass half-empty type, you could view it such that a CPU running hotter will thermally throttle. Either way, frequency is contingent upon thermals, and that’s important for users who want to maximize performance or pick the right case and CPU cooling combination. If you’re new to the space, the way it has traditionally worked is that CPUs will perform at one spec, with one set of frequencies, until hitting TjMax, or maximum Junction temperature. Ryzen 3000 is significantly different from past CPUs in this regard. Some excursions from this behavior do exist, but are a different behavior and are well-known. One such example would include Turbo Boost durations, which are explicitly set by the motherboard to limit the duration for which an Intel CPU can reach its all-core Turbo. This is a different matter entirely from frequency/cold scale.
An Intel CPU is probably the easiest example to use for pre-Ryzen 3000 behavior. With Intel, there are only two real parameters to consider: The Turbo boost duration limit, which we have a separate content piece on (linked above), and the power limit. If operating within spec, outside of the turbo duration limit of roughly 90-120 seconds, the CPU will stick to one all-core clock speed for the entirety of its workload. You could be running at 90 degrees or 40 degrees, it’ll be the same frequency. Once you hit TjMax, let’s say it’s 95 or 100 degrees Celsius, there’s either a multiplier throttle or a thermal shutdown, the choice between which will hinge upon how the motherboard is configured to respond to TjMax.
With the launch of the Ryzen 3000 series processors, we’ve noticed a distinct confusion among readers and viewers when it comes to the phrases “Precision Boost 2,” “XFR,” “Precision Boost Overdrive,” which is different from Precision Boost, and “AutoOC.” There is also a lot of confusion about what’s considered stock, what PBO even does or if it works at all, and how thermals impact frequency of Ryzen CPUs. Today, we’re demystifying these names and demonstrating the basic behaviors of each solution as tested on two motherboards.
Precision Boost Overdrive is a technology new to Ryzen desktop processors, having first been introduced in Threadripper chips; technically, Ryzen 3000 uses Precision Boost 2. PBO is explicitly different from Precision Boost and Precision Boost 2, which is where a lot of people get confused. “Precision Boost” is not an abbreviation for “Precision Boost Overdrive,” it’s actually a different thing: Precision Boost is like XFR, AMD’s Extended Frequency Range boosting table for boosting a limited number of cores when possible. XFR was introduced with the first Ryzen series CPUs. Precision Boost takes into account three numbers in deciding how many cores can boost and when, and those numbers are PPT, TDC, and EDC, as well as temperature and the chip’s max boost clock. Precision Boost is enabled on a stock CPU, Precision Boost Overdrive is not. What PBO does not ever do is boost the frequency beyond the advertised CPU clocks, which is a major point that people have confused. We’ll quote directly from AMD’s review documentation so that there is no room for confusion:
GN just notched one of its busiest weeks ever, thanks to relentless product launches from AMD and Nvidia. We’ve recently reviewed Nvidia's RTX 2070 Super and RTX 2060 Super, in addition to AMD’s Ryzen 5 3600, Ryzen 9 3900X, and Radeon RX 5700 XT. We also have multiple videos further analyzing Ryzen 3000 boost clocks and the RX 5700 XT cooling solution.
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For mostly non-AMD related news this week, Intel has announced multiple new technologies focused on chip packaging, in addition to hiring a new CCO in Claire Dixon. MSI is updating its AM4 400-series of motherboard to include a larger BIOS chip, there’s a new PCIe 4.0 SSD coming, with a presumably cheaper 500GB capacity, and we’re expecting custom Navi cards in August. The news stories follow the video embed, per the usual.
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