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Comment by snvzz | Hacker News Reader

Reminder: Haswell and Zen1 were around 8.1 specint2006/GHz.

These CPUs are above that.

So is P550 ... 8.65 is the claim I think. It doesn't have the MHz though. My i7-4790K (which is still in the back room somewhere) had a base of 4.0 GHz and could turbo to 4.2 or 4.4. My Megrez is doing just 1.8 GHz.

Main issue with P550 is no V. Huge handicap, can't easily make up for that.

RVA23 requires V. These incoming CPUs are the real deal, a perfectly usable performance level in the present day.

(unless they cache-starve them or some other such fuck up)

My 4790k was still my main PC until I recently (weeks) built a new PC with 9800x3d, 96GB ECC, rx7900gre.

4790k had 4 cores. If these new chips clock reasonably, say, 3+ GHz, and have 8 or 16 cores, they'll easily generally outdo this old -but very usable still- Intel chip.

Everyone needs to be focusing on memory controllers. No one has enough main memory bandwidth.

I'm okay with ddr4 as long as you can still buy it.

No V instruction set is going to be a big handicap though, as that's pretty much RISC-V's equivalent of AVX and missing those instructions is going to suck big time.

RVA23 compliant implies V.

Two of the three processors seem to be RVA23.

Pretty much my issue is that the one that is the closest to shipping is also the one missing V instructions. I am far more skeptical over potential processors especially after Horse Creek just vanished into thin air.

Two just say RVA23, one is "Compliant with RVA23 excluding V extension".

It's a long way to say "Not complaint with RVA23."

Reminder: The Cortex-A76 cores in the Pi5 are 9.9 SPECint2006/GHz, only the UR-CP1000 is above that, but that doesn't support RVV.

The SpacemiT X100 is slightly below that, but has 256-bit RVV and RVA23 support.

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