If you are to trust Jim's high trust in a particular source
which merely points out things which were already circulating around for a while, except with a "don't get too excited" cover.
Then "strictly single-threaded" IPC increases are in the 10-15% realm, perfectly realistic.
However, it also confirms that there's no more CCX-splits within a CCD - thus we're looking at 8 cores with ~32 MB of L3 - instead of 4+4 cores with 16+16 MB of L3
Now, what if I were to tell you that I've been in info-wars long enough to know that specifically wording things such as "single-threaded IPC increase" constitutes an insinuation towards something.
And indeed, what if I were to also tell you that we have a handy-dandy comparison point coming out very recently;
What is notably present in this set of bench data, is a 3300x and a 3100 both running at 4.4 Ghz with matched settings in all other regards.
That is a 4+0 core CPU with 16+0 MB of L3 cache, versus a 2+2 core with 8+8 MB of L3 cache
Zen3 brings us a 8+0 core CPU with 32+0 MB of L3 cache, versus 4+4 cores with 16+16 MB of L3 cache that we saw with Zen2
If you wish to guesstimate the impact of this consolidation, you can take a looksie at the difference between the 3300/3100 at 4.4 Ghz - then multiply the difference by whatever 1.1x to 1.15x your optimism prefers.
I was bored after waking up today, so I did a bit of that;
Code:
Since I was bored, I decided to take a looksie at the clock-for-clock disparity between the 3100 and 3300x as I mentioned in regards to it being a hint as to Zen3's improvement in >4-core calculation activities.
Given a baseline of 1.11x ""IPC"" performance; there's an uplift of ~1.12x-1.15x in applications that don't actually give much of a **** - as they operate on a strict "each core does a small chunk of the same work" diet, without any cross-talk
In applications which do have cross-talk, it's more along the lines of 1.2-1.25x
In applications where the cache coherency is critical for all cores doing their job properly, the uplift is around 1.45x*
* (this is a rather extreme code-compilation example https://www.youtube.com/watch?v=NM2fFpzPKPg&t=23m30s thus I wouldn't read too much into it)
For repeating my little thought experiment, you gather numbers from the 3300x 4.4 Ghz and 3100 4.4 Ghz charts - calculate the difference, then apply the Zen3 vs. Zen2 IPC differential you'd like to present (I went with a rather conservative 11%)
; )
I'd rather recommend getting familiar with
all that wack-*** AM4 tweaking jazz now, rather than waiting for Zen3 to pop out.
I came off an i5-4690k, and this
dinky little 3600 with its release-day trash-tier silicon runs goddamn circles around that platform.
A 3600 is cheap, a 3300x is A Cheapskate Start™ - and if you're waiting for the latter, then I'd grab an x570 Tomahawk once you're done waiting for it to actually hit shelves.
