Template talk:AMD Ryzen 3000 series

Pro 3700

Shouldn't the Ryzen 7 Pro 3700 be the first in its group (above the 3700X)? 87.75.117.183 (talk) 13:32, 1 October 2019 (UTC)

Done. 87.75.117.183 (talk) 23:36, 1 October 2019 (UTC)

6- and 8-core models with two CCDs

There are two types of CCDs in this family.

1. 4 cores 16 MB cache on CCD

2. 8 cores, four cores per cluster. 32 MB cache on CCD

Cores of the second type are used in the 3950s and the whole family is 39?? , 36??, 35?? it is essentially one or another defective of these CCDs. Just at 36??, 35?? only one CCD.

Cores of the first type are used in full power in the 37?? series, and with one CCD they are called 3300X

At first, AMD released full-fledged cores asusedandin EPYC, but they turned out to be expensive. And then AMD released cheaper CCDs with one cluster and less cache, which turned out to have a much higher yield of usable chips. TTACH (talk) 18:21, 7 April 2023 (UTC)

I have researched the internet a bit about this, and apparently, on 6-core (Ryzen 5) and 8-core (Ryzen 7) CPUs that have two CCDs, only one of the CCDs is active and working, the other one is disabled.

Furthermore, not all of these 6- and 8-core CPUs have two physical CCDs present inside. Only some do.

References:

So I reckon just present it as one CCD anyways. — AP 499D25 (talk) 10:45, 26 April 2023 (UTC)

I don't fully understand the topic in question here. To me it sounds like CCX confusion. First example is more of a core complex (CCX) rather than CCD.

For example: 3300X is full single CCX model (no extra CCX to CCX latency) while 3100 has two CCX.[1][2]

Both examples use single CCD, only difference is a number of active CCXs. It's easy to confuse CCX with CCD when comparing with Zen 3 (or Zen 4).

Looking back at Zen 1, it used only CCXs up to 4 cores (no CCDs) with 8 MB cache per 2 cores.[3]

Sidenote: L3 cache on Zen2 is not unified across entire CCD (like with Zen3). Zen2 has 16 MB per CCX (4 cores), while Zen3 has 32 MB per CCD (8 cores).[4]

Offtopic: Allegedly there are some 5600X/5800X models with 2 CCDs. Either way, I think we should keep the current config info (for 5000 series). Rando717 (talk) 12:30, 26 April 2023 (UTC)

Thanks for coming by here.

I didn't fully understand the questions of the OP either, but I tried my best.

Considering they made the post shortly after this edit, in which they changed the number of CCD chiplets for 8-core Ryzen 7 processors from 1 to 2, I was guessing that they were talking about there being Ryzen 7 chips with two CCDs inside. They cited this source: as the evidence of 8-core processors with two physical CCDs inside, so indeed they apparently do exist, just like with the Ryzen 5k series 6- and 8-core CPUs cited in previous post with two CCDs.

During my research it seemed quite clear to me from the sources and forum posts I looked at that it is not a "3 or 4 cores enabled in each CCD" situation, instead the second CCD is disabled and just the first one has all those 6 or 8 cores. So I think it is incorrect to state there are two (active) CCDs because of the existence of these unusual two-CCD processors. Plus, not all of them are like this either. — AP 499D25 (talk) 14:39, 26 April 2023 (UTC)

References