11/25/2023 0 Comments Amd zen 4 igpu![]() Also, unlike the previous-generation 5800X3D that lacked any notable overclocking capabilities, AMD is introducing a greater degree of overclocking with its 7000X3D series through Precision Boost Overdrive.ĪMD Zen has been one of the most remarkable turnarounds for a company in the semiconductor industry, and has had a profound impact on the consumer, as it influenced Intel's CPU core-counts. In our review, we've presented data for these modes. Or you can just disable all optimization-this is only useful if you're poking around with the tech, or troubleshooting things. The third toggle, "prefer frequency," prioritizes workloads to the second CCD without 3D Vertical Cache, which can sustain higher boost frequencies. By default, you can leave the driver alone to do its thing, or you can take control, and tell it to "prefer cache," where all workload is prioritized to the CCD with the 3D Vertical Cache. Unlike Intel Thread Director, the middleware responsible for making sure the right workload is handled by the ideal type of CPU cores on a Hybrid processor, AMD's Cache Optimizer driver gives you a degree of control via toggles in the motherboard's UEFI setup program (and possibly in the future through Ryzen Master). The second CCD without the stacked cache has the ability to boost to higher frequencies, and so the driver has the ability to direct specific kinds of workloads that benefit from a short burst of high-frequency, to that CCD. ![]() Is this AMD's take on Hybrid Architecture? Not really, the CPU cores on both CCDs are the same "Zen 4" cores, with an identical ISA, it's just that there's some driver-level intelligence that makes sure 3D Vertical Cache benefits the applications that could use it. While the X3D CCD is handling the gaming workload, the cores of the second CCD are parked, and woken up as needed for background tasks. For the 7950X3D, the latest PPM Provisioning File Driver does essentially the same action as the Cache Optimizer Driver, except using CPPC power-management controls. These drivers are typically involved in fine-grained collaborative power-management of the processor in response to performance demands from the OS, and play an especially important role on the mobile platform. This driver ensures that workload from games are directed to the CCD with the 3D Vertical Cache using dynamic "preferred cores" flagging for the Windows OS scheduler.ĪMD Chipset Software includes a second relevant component, the PPM Provisioning File Driver. ![]() To make sure gaming workloads find the right CCD, AMD has implemented a high degree of software-level control, in the form of its 3D Vertical Cache Optimizer Driver, which is included with the latest version of AMD Chipset Software. The second CCD provides 8 additional cores which also clock higher, bolstering the processor's multi-threaded productivity performance. The reasoning is that 8 out of 16 cores enjoy 3D Vertical Cache, and most gaming workloads only benefit from up to 8 cores anyway. AMD explains saying that this approach lowers manufacturing costs, and that the benefit of adding 3D Vertical Cache to the second CCD in gaming performance wasn't found justifying the added cost. The other is a regular "Zen 4" CCD with just 32 MB of on-die 元 cache. In an interesting engineering choice, AMD decided to give only one of the two CCDs 3D Vertical Cache. The 16-core Ryzen 9 7950X3D being reviewed here, and the 12-core Ryzen 9 7900X3D, are dual-CCD processors. Soldered TIM then bonds the CCD with the processor's copper integrated heatspreader (IHS). ![]() Since this adds to the vertical thickness of the CCD towards its center, the edges of the CCD that have the all-important CPU cores, are layered with a highly conductive structural silicon that levels out the die. At a physical level, the 3D Vertical Cache is a 64 MB SRAM placed on a silicon die built on the 6 nm process AMD refers to this die as simply the 元 Cache Die (元D), which is stacked on top of the CPU Complex Die (CCD).
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