This was a tremendous waste of energy, added latency, and in general wasn’t a good idea. Those two cache slices and core clusters were not directly connected, for core 4 to talk to core 5, it had to leave the die, go to the cOID, and then back out to the other CCX on the same CCD. Zen 2/Rome CCDs were logically subdivided into two 4C CCXs, each with 16MB of 元 cache. This has some very interesting implications for the Milan based server products, but that is a story for another day.ĭelving into the CCD a little deeper we see some differences emerge, specifically at the core organization level. More impressive is that AMD was able to up the memory speeds supported to DDR4-4000 without changing the cIOD which contains the memory controller. This means the total silicon area is 205.7mm^2 for the single CCD packages, 286.4mm^2 for the 2 CCD SKUs. Each CCD is 80.7mm^2 and contains 4.15 billion transistors. Those changes necessitated a new package, the wiring isn’t the same, but nothing much more than that. On the CCD side, just about everything changed, but for now we will focus on the die itself.
That cIOD is the exact same chip as the cIOD in the R3K line, literally nothing has changed on this 125mm^2, 2.09 billion transistor 12nm die from Global Foundries. There are one or two CCDs, built on an evolved 7nm process (+ or ++ in Intel-speak), and one cIOD. If you look at a high level block diagram of The Ryzen 5000 CPUs, they look like the Zen 2 based Ryzen 3000 devices. The only real question is how it gets there, and that is a long story.
Amd zen time Pc#
Since it is the highest end gaming PC on the market right now, you would expect it to post the best numbers, and a brief glance around the net shows it does live up to SemiAccurate’s earlier claim that “ AMD should win at everything now and Intel has no response“. With all that in mind there is one thing that stands out too us, this system is seriously fast. Jacking the memory up to DDR4-4000 reliably booted to desktop but crashed a few hours into the benchmark run so no numbers until we have time to relearn a lot of things.
Amd zen time pro#
Within a few minutes of fooling around on the system, an AMD Ryzen 9 5950X on an Gigabyte X570 Aorus Master with a Samsung 980 Pro PCIe4 SSD and 16GB of GSkill Trident Z Royal DDR4-3600 memory the system was running at 4.5GHz on all cores at 1.25v. Much of this is down to the PCIe4 SSD but the CPUs have to process that data when it comes in. The boot speed of Linux Mint 20 was so fast it was noticeable, literally a fraction of the time it takes on our main daily system. We only had a short time to play with a fully working Ryzen 5950 system but it impressed us. Lets start out our look at the AMD Ryzen 5000 CPUs by saying we are getting back in to testing after a long absence and there are a lot of teething problems, things that are missing, and much to relearn. AMD’s Ryzen 5000 line with their new Zen 3 core did just that. It has been a long time since SemiAccurate used a CPU that felt significantly faster than the last one.
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