There is one 3D V-Cache installed in the Ryzen 9 9950X3D and 9900X3D. It's fake news that two specialized PC gaming environment builders Z will be installed

September 29, 2024CPU

Fake news is spreading in Japan and abroad that the Ryzen 9 9950X3D and Ryzen 9 9900X3D will be equipped with 3D cache.

This fake news came from foreign media.TechPowerUp. TechPowerUp is a Taiwanese media outletBench LiveReports indicate that the Ryzen 9 9950X3D and Ryzen 9 9900X3D will be equipped with 3D V-Cache (one 3D V-Cache per CCD). but,BenchLife never said anything like that.

However, BenchLife also writes a misleading cache configuration for the Ryzen 9000X3D series. The BenchLife article describes the cache configuration of the Ryzen 9000X3D series as follows.

As a basic introduction, please remember that 1CCD L3 is 32MB and 3D V-Cache is 64MB.

What did you think when you looked at the calculation formula above? Perhaps, if you simply calculate, you will get “??”. Taking Ryzen 9 9950X3D as an example, 64+128+16+1＝209MBIt should be. but,”=145 MB“It is written.

The reason why the above mathematical formula appears meaningless is because it is probably based on foreign media.VideoCardz article. VideoCardz writes the Ryzen 9000X3D series cache calculation formula as follows.

The BenchLife review is likely an edit (or typo) of what VideoCardz wrote, and has been edited in a strange way.

The VideoCardz formula shows that all models are equipped with only one 3D cache.

Taking VideoCardz's Ryzen 9 9950X3D as an example, “32MB each CCD (64MB L3) + 64MB 3D V-Cache” This part is “2 CCDs for a total of 64MB L3 + 64MB 3D V-Cache” ago 1 CCD is 32MB A total of 128 MB.

However, BenchLife made a strange change and wrote “64MB L3 Cache + 128MB 3D V-Cache”. The “128MB 3D V-Cache” section of BenchLife states “64MB total 2CCD + 64MB 3D V-Cache.” Therefore, the final size is “=145MB”.

BenchLife is similar to the bottom model, where the 3D V-Cache portion is written as a total with L3, and is inexplicably written as “96MB 3D V-Cache”.

TechPowerUp misunderstood a BenchLife edit (typo) and stated that the Ryzen 9 9950X3D and Ryzen 9 9900X3D are equipped with 3D V-cache (3D V-cache per CCD).

Again, the primary source, BenchLife, doesn't say there will be two 3D V caches. The story reported locally and internationally that the Ryzen 9 9950X3D and Ryzen 9 9900X3D will be equipped with 3D cache is fake news.

As a side note, AMD has actually conducted experiments in the past with two CCDs each equipped with 3D V-Cache. However, since it was not possible to improve game performance if the cache was split into two parts, only one 3D V-Cache was installed.