![]() ![]() These GPUs are primarily made with CPU-focused workstations and business desktops in mind, systems where graphics performance is non-critical but being able to drive a couple of monitors in a small power envelope is handy. All four of the CPUs introduced today include a GPU with two compute units (CUs) built into the I/O die and based on the same RDNA2 architecture as the Radeon RX 6000 dedicated GPUs and the Ryzen 6000-series integrated GPUs. Advertisementįor the first time, all of AMD's CPUs include a basic integrated GPU. ![]() For these CPUs, AMD typically recommended DDR4-3600 as a sweet spot, since the RAM, memory controller, and Infinity Fabric could all easily handle an 1800 MHz clock speed, and DDR4-3600 was generally a lot cheaper than faster RAM kits while being only slightly more expensive than slower RAM kits. If you set your memory clock speed too high for the Infinity Fabric to keep up, the Infinity Fabric clock speed could actually fall back to a lower speed, introducing latency that could offset the performance benefit of the faster memory (and wasting whatever extra money you spent on super-fast RAM). In Ryzen 30 CPUs, the recommended strategy was usually to try to keep MCLK, UCLK, and FCLK running at the same speed (also called a 1:1:1 ratio). In short, RAM speed (MCLK), memory controller speed (UCLK), and the speed of the Infinity Fabric interconnect (FCLK) are all tied together, part of the reason why Ryzen's performance has historically been more sensitive to memory bandwidth than Intel's. AMD recommends a "sweet spot" of DDR5-6000 to get the best performance out of Ryzen 7000.Įxplaining why is a bit complex. But as with most motherboards these days, one-click RAM overclocking is both supported and encouraged. The DDR5 memory controller supports DDR5-5200, as far as officially sanctioned JEDEC memory standards go. It's just important to know which number is being referenced when talking about RAM speed. This isn't false advertising-the first D in DDR stands for "double," referring to DDR memory's ability to transfer data at a rate of twice per clock cycle. But their clock speed in MHz is only half that number-DDR5-5200 is running at 2,600 MHz, DDR5-6000 is running at 3,000 MHz, and so on. Megahertz Memory speeds are advertised in megatransfers per second, or MT/s. The IOD also includes its own USB controller with support for up to four 10Gbps USB 3.2 Gen 2, included partly to enable DisplayPort-over-USB-C connections to the integrated GPU and the built-in USB flashback functionality. ![]() There's a new integrated GPU, a first for non-APU Ryzen processors. ![]() The processor can supply up to 28 lanes of PCIe 5.0 bandwidth, though motherboards with non-"Extreme" chipsets will still use PCIe 4.0 for the GPU slot. The Ryzen 7000 IOD has a new DDR5 memory controller with support for ECC RAM in motherboards that also support ECC RAM (but, unlike Intel, there's no DDR4 controller-it's DDR5 or bust). Both Zen 2 and Zen 3 desktop processors used the same 12 nm I/O die, which means it has been a couple of generations since we've seen major improvements here. The benefits of scaling down these chipset functions aren't as noticeable or important as they are for the CPU cores themselves, so AMD keeps them physically separate, tied together via the Infinity Fabric interconnect. In AMD's processors, the IOD is a separate piece of silicon on the CPU package that has been manufactured on a more-mature, less-advanced process than the CPU dies. Here's hoping that prices on the fancy RAM come down by the time AMD's next Ryzen chips hit the market, because they won't support DDR4.Zen 4 is an impressive jump from Zen 3, but if anything, the I/O die (IOD) is an even bigger departure from previous chips. After all, such a link is still likely to limit the peak memory speed, and DDR5 is already expected to scale past 7000 MT/s. Of course, AMD's aforementioned emphasis on Zen 4's ability to hot-clock DDR5 could just as easily be an indication that the Infinity Fabric clock on Ryzen 7000 processors ISN'T linked to memory speed anymore. Still, it's likely that Apacer was given these numbers by AMD, so we're ready to take them at face value. The slide is buried in an obscure page that outlines the benefits of DDR5 memory over DDR4, like higher transfer rates, higher density, and on-module power management, and it certainly isn't official AMD material, which means it's possible that AMD's Ryzen 7000 chips could be spec'd for lower or even higher DDR5 speeds. That's a fair whack faster than the DDR5-4800 officially supported by Intel's latest chips, although Intel's processors certainly aren't limited to just that. Image: Apacer Industrial, via point in the favor of that argument is the slide above from Apacer Industrial, discovered by Twitter leaker which clearly marks down Zen 4-based Ryzen and EPYC processors for DDR5 memory running at up to 5200 MT/s. ![]()
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