Notebookcheck

Latest Zen 3 rumor further reiterates 10-15% IPC gains per thread and 32 MB of shared L3 cache per CCX, Zen 4 to feature 1 MB L2 cache and AVX 512 support

AMD Zen 3 will offer perceivable IPC gains per thread. (Image Source: AMD)
AMD Zen 3 will offer perceivable IPC gains per thread. (Image Source: AMD)
The upcoming AMD Zen 3 Ryzen 4000 desktop CPUs will likely offer 10-15% IPC gains per thread, according to a new report. Zen 3 will feature up to eight cores per CCX and a 32 MB L3 cache that can potentially improve latency in gaming. Also being confirmed is that Zen 4 will require a new socket and feature a 1 MB L2 cache and AVX 512 support.

AMD will be launching the 7nm++ Zen 3-based Ryzen 4000 CPUs for desktop later this year. While Zen 3 belongs to the optimization phase of AMD's inflection-optimization cycle, it is still expected to bring some core architecture improvements. We have been hearing about the purported IPC gains in Zen 3 for quite some time now, and the latest report from AdoredTV further confirms them. 

According to AdoredTV's sources, the IPC gains in Zen 3 will be on par with that of Zen 2, which is between 10-15% per thread. Multi-threaded workloads could still see larger IPC gains. Zen 3 will also introduce a new CCX design, which could be among those core architecture improvements Dr. Lisa Su had alluded to earlier. Zen 3 will have one CCX with eight cores with a single L3 cache at 32 MB per CCX. Larger caches such as 48 MB or 64 MB are not indicated. With the new cache design, more number of cores now have access to a common L3 cache on the same die. This will likely reduce latency and improve gaming performance. Zen 3 will continue to use SMT-2 and not SMT-4 as was rumored earlier.

Previous reports indicated that Zen 3 could offer up to 8% IPC improvements and some reports even said that the number could be, in fact, higher than 15%. However, is now becoming increasingly clear that the IPC improvements per thread would be in the 10-15% range, which is nothing to scoff at. 

Also being confirmed is something that we had reported back in December 2019 — that the 5nm Zen 4 Ryzen 5000 will herald the beginning of a new socket. New information we have now is that Zen 4 will feature more cores, a 1 MB L2 cache, AVX 512 support, and will look to offer much improved IPC.

AMD Zen 3 CCX layout. (Image Source: AMD)
AMD Zen 3 CCX layout. (Image Source: AMD)

Source(s)

Read all 4 comments / answer
static version load dynamic
Loading Comments
Comment on this article
Please share our article, every link counts!
> Notebook / Laptop Reviews and News > News > News Archive > Newsarchive 2020 04 > Latest Zen 3 rumor further reiterates 10-15% IPC gains per thread and 32 MB of shared L3 cache per CCX, Zen 4 to feature 1 MB L2 cache and AVX 512 support
Vaidyanathan Subramaniam, 2020-04- 6 (Update: 2020-04- 6)
Vaidyanathan Subramaniam
I am a cell and molecular biologist and computers have been an integral part of my life ever since I laid my hands on my first PC which was based on an Intel Celeron 266 MHz processor, 16 MB RAM and a modest 2 GB hard disk. Since then, I’ve seen my passion for technology evolve with the times. From traditional floppy based storage and running DOS commands for every other task, to the connected cloud and shared social experiences we take for granted today, I consider myself fortunate to have witnessed a sea change in the technology landscape. I honestly feel that the best is yet to come, when things like AI and cloud computing mature further. When I am not out finding the next big cure for cancer, I read and write about a lot of technology related stuff or go about ripping and re-assembling PCs and laptops.