But it certainly makes sense to prioritise a smaller, more efficient core for laptops. Indeed, there are rumours that AMD has done just that for its next gen Zen 5-based APU for laptops, albeit AMD's laptops are monolithic dies rather than chiplet designs. Where Intel designs a whole new core and spins up a zillion different CPU dies, AMD tweaks its existing core, adds a single new chiplet design and ends up with the ability to mix and match performance and efficiency cores as needed. Overall, it seems like a typically clever and efficient way to go about things. And indeed AMD's public roadmaps show just such a "Zen 5c" architecture is planned for next year. If it wants to release a hybrid Zen 5 chip, for instance, it doesn't need to design a whole new core to go along with Zen 5, just apply the same space optimization to Zen 5 as it did to Zen 4 and create Zen 5c. But theoretically, it would be easy enough for AMD to package, say, one of its existing eight-core Zen 4 chiplets or CCDs with a 16-core Zen 4c chiplet, and thus offer a 24-core and 48-thread CPU for the desktop that would be pretty darn compelling.īest CPU for gaming: The top chips from Intel and AMDīest gaming motherboard: The right boardsīest graphics card: Your perfect pixel-pusher awaitsīest SSD for gaming: Get into the game ahead of the rest That's a Zen 4c-only design with up to eight chiplets, each with 16 Zen 4c cores for a maximum total of 128 cores and 256 threads. AMD has announced its first CPU with Zen 4c cores, a server chip known as Bergamo. For a desktop gaming PC with a mix of Zen 4 and Zen 4c cores, for instance, you'd still very much want to ensure that the main game threads were all running on the full Zen 4 cores.Īnyway, with all this in mind, the next question is when we might see an AMD hybrid CPU in a desktop or laptop and what sorts of specifications you might expect. Of course, given that Zen 4c cores run at significantly lower clocks, you'll still want to be careful how you schedule threads. It takes eight Zen 4c chiplets to deliver 128 cores. So, it's that bit more complicated to manage thread allocation and load balancing on Intel's hybrid design. And, of course, Intel's Efficient cores do not support multi-threading. So, you can cram roughly four Efficient Cores into the space of one Performance core.īut there's much more asymmetry between Intel's core types, differences in issue width and latencies and even instruction set. Intel's Efficient cores are even smaller than AMD's, taking up more like one quarter the space of an Intel Performance core. 12th Gen Alder Lake and 13th Gen Raptor Lake Intel CPUs have two totally different core designs. Of course, it just so happens that games are one such an application that tends to benefit from more cache memory, hence AMD's own X3D CPUs with oodles of added cache such as the Ryzen 7 7800X3D.Īnyway, it's a very different approach to Intel's. (Image credit: AMD)Īnd yet, the core remains functionally identical and offers the same IPC or performance per clock cycle as full Zen 4, save for cases where the 元 cache differential has a substantial impact. Zen 4c is functionally identical to Zen 4 but takes up just half the space.
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