Home sweet home pc indie radeon r4
In fact AMD has managed to improve its IPC so much now that it can offer comparable performance to Intel, and is able to do so at lower clock speeds. Intel's combination of high IPC and high clockspeeds has given it the edge in gaming for years now, but that dominance could well be over. In case it isn't clear, these IPC improvements are important because a lot of PC games still love CPUs which prioritise the ability to handle a lot of instructions per clock over core count.
#Home sweet home pc indie radeon r4 code
There's also increased load/store bandwidth for handling larger structures, which basically means code is handled more efficiently and completed quicker. The execution engines have seen an overhaul as well, boasting reduced latency and more silicon to get work done. The processor front-end boasts faster fetching thanks to a doubling of the L1 buffer size, there's increased bandwidth for handling branch predictions, and faster recovery for mispredictions. The building blocks of how the CPUs actually work have been upgraded too. As we saw with Zen 2, this approach helps AMD save significant cost per processor.īack to that 19 percent IPC improvement claim, this reworking of how the cores are laid out isn't the only factor in the improved performance on offer from Zen 3. It's a versatile design, and helps AMD make the most out of the working chiplets it has at its disposal. The likes of the Ryzen 9 5900X meanwhile has a pair of chiplets each with six active cores. Meanwhile the top of the stack, the Ryzen 9 5950X, which is a 16-core, 32-thread CPU, has two eight-core chiplets alongside that same I/O die.
This change also means that AMD can now produce CPUs with up to eight cores using only a single CCX and the accompanying I/O die-this is exactly how the Ryzen 7 5800X is configured. While, on the face of things, the move from a pair of four-core CCXs with 16MB of 元 cache apiece to a single eight-core CCX with 32MB of 元 cache may not seem like much of an improvement on its own, it's actually incredibly important in terms of gaming. There may still be times in dual chiplet CPUs where one cluster wants to access the 元 cache, or communicate with the cores of another cluster, and it can absolutely do that via the Infinity Fabric, but this shouldn't happen anywhere near as often in normal usage.Īll of this is important for us because games often rely very heavily on speedy cache and lightning memory access, so more cores having access to a larger block of 元 cache can see an uptick in performance all on its own. This also means that core-to-core access is much quicker as well, and will mean there are situations where this change alone can offer significant performance improvements. Now all eight cores can access 32MB of 元 cache directly, and don't need to go through the I/O die to do so.
In Zen 3, AMD has moved to an eight-core design instead. Which is much slower than accessing that local 元 cache.
If a core from one cluster wants to access the 元 cache from another cluster it has to communicate with that cluster through the I/O die using the Infinity Fabric. Zen 2 has up to four cores per core complex (CCX), so that each four-core cluster has access to 16MB of 元 cache. The most fundamental change Zen 3 does offer over Zen 2 is in how the cores are configured. So no, Zen 3 doesn't use TSMC's further-improved 7nm+ production process. This isn't that much different from the production process used for the initial Zen 2 chips, other than optimizations that have been made by AMD and TSMC to get the most from the process. These new AMD Ryzen 5000 processors are still using TSMC's 7nm node. These improvements to the Zen microarchitecture haven't been derived from a new process node either-the Ryzen 5000 chips use the exact same production process as the XT chips that were released this summer, the 3900XT, 3800XT and 3600XT. AMD is claiming a 19 percent IPC improvement over Zen 2, which isn't the sort of boost that comes easily-you need only look at Intel's modest improvements over its last few generations for proof of this. When you factor in the performance improvements it offers that does actually make more sense. On paper AMD's Zen 3 architecture looks like a fairly straightforward evolution of Zen 2, but AMD is keen to point out that something a little more radical has taken place, that Zen 3 is actually a complete ground-up redesign.