I do not expect doubling the 元 Cache again as there will not be enough space even after an increase in the density. But so far, we don’t know how much of an increase we can expect. TSMC’s 7nm+ Node will allow a 20% Higher density, and I believe that a good part of it could go to the 元 Cache. So, AMD wouldn’t miss the chance to take more advantage of the same. The increase in 元 Cache was already a significant contributor to Zen 2’s Higher IPC. This is clearly indicating that AMD will likely increase the 元 Cache just like they did with Zen 2. If you check the above image, you’ll find a + sign next to 32 MB 元 Cache in Milan. Maybe this could end up being AMD’s secret ingredient to surpass Intel’s upcoming Comet Lake CPUs in gaming. But when it comes to gaming, this could result in a decent boost in performance. The performance benefits of unifying the cache could vary for different applications. It will significantly reduce the latency that was involved with sharing the data between Cores that were on a separate CCX. Hence, instead of having two CCX on a chiplet, there will only be a single CCX. With Zen 3, the 元 Cache will be shared by the whole Core Complex Die (CCD). While a small part of the problem can be addressed through the OS (By first scheduling all the process threads to one CCX before moving to the second one), it still isn’t good enough for those applications that can utilize a higher number of cores. The 元 Cache from one CCX also needs to be shared via the Infinity Fabric, resulting in higher latency. This results in a latency penalty, which was a disadvantage over Intel’s ring bus interconnect. If two cores on separate Core Complex (CCX) have to communicate with each other, they had to do it through the Infinity Fabric. Image Credits: TSMC Unifying & Increasing the 元 Cache The yields of TSMC’s N7+ are also now on par with N7. The only scenario where N7 or N7P is possible is when all the earlier slides stating 7nm+ were false. While there is a slim possibility of AMD sticking with N7 or go with N7P, but that is extremely unlikely.Īs the older slides showed 7nm+ (N7+), it should be true as you can’t change the fabrication process after designing a microarchitecture. On AMD Financial Analyst Day, Zen 3 is revealed to be on 7nm but it is more likely that AMD doesn’t want to reveal which variant of 7nm will it be. You can learn more about different Fabrication Nodes from this article. It will also provide a 10% higher performance or 15% better power efficiency. The new N7+ process will allow 20% higher transistor density. TSMC’s 7nm+ Node (N7+) is their 2nd Generation of 7nm Process with some critical layers processed using EUV (Extreme Ultraviolet Lithography).
It has already been confirmed by AMD multiple times. Zen 3 will be fabricated using TSMC’s refined 7nm+ Process. The above slide also confirms that the Ryzen 4000 is codenamed Vermeer. We will only be able to find more information on it during the product launch in 2020. But AMD and the Motherboard manufacturers will likely find a workaround by creating a Zen 3 exclusive BIOS that will drop the support for previous-gen chips.
It is mainly due to the limitations of the BIOS chip sizes. Whether the 1st Gen Chipsets (B350 & X370) will support 4th Gen Ryzen will remain uncertain. However, this slide didn’t end up being true for 3rd Gen Threadripper as it requires the new sTRX4 Socket. Furthermore, if they switch the socket now, it will only last one generation as DDR5 is expected in 2021 with Zen 4. They also don’t have any reason for switching to another socket in the first place as they are sticking with the same DDR4 Memory for Zen 3. Here’s an official slide that confirms that AMD’s 2020 Desktop CPU will be on AM4.Īlthough the slide is from 2018, it is unlikely that AMD would change their existing plans to keep Ryzen 4000 on AM4. Lisa Su, has mentioned it quite a few times about their commitment to the AM4 Platform. It has been written in some of the slides that ‘Roadmaps are subject to change.’ AM4 Support & CodenamesĪMD’s CEO, Dr. Zen 3 will support PCIe 4.0 just like Zen 2ĭisclaimer: Even though the above details have been confirmed officially by AMD, some stuff can still change as time goes on.3rd Gen EPYC will support the same SP3 Socket.AMD could further increase the 元 Cache.
Amd zen 3 series#
Ryzen 4000 Series will continue to support AM4 Socket.
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