9800x 3d vs 12900k - Battle of the Century

[JustBenching]

x3D cache adds ~5ns to the AIDA result.

The main nvme has a direct connection to the CPU if I'm not mistaken, the second nvme goes through the chipset if the SSD is SATA, probably also through the chipset.

The fine-tuned 12900k has more cores (threads) and more raw performance, so in heavy scenes with many objects - it will be faster.
The 9800x3D will be faster where latency plays a role because in most cases it will use the cached x3D data (~7ns) but not the RAM (~60ns).

12900k isn't faster, it's just gets less of a hit in performance in heavier scenes. It's still slower than the 9800x 3d (bar the odd game here and there) but as I've said, way more consistent. I think it's totally due to the memory subsystem. A cache hit imposes a way bigger penalty on the x3d due to the slower memory subsystem, but a correct cache prediction also helps it more, resulting in insanely high maximum frames but relatively low minimum frames.

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new AGESA is out - got a bit of latency reduction.

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Frame pacing is a bit better. Still beta bios tho.

You are getting 64 after the new agesa or before? Cause im stuck at 63-64 with 6400c28 tuned to hell. AMD promised an agesa fix for that.

 

[AVATARAT]

12900k isn't faster, it's just gets less of a hit in performance in heavier scenes. It's still slower than the 9800x 3d (bar the odd game here and there) but as I've said, way more consistent. I think it's totally due to the memory subsystem. A cache hit imposes a way bigger penalty on the x3d due to the slower memory subsystem, but a correct cache prediction also helps it more, resulting in insanely high maximum frames but relatively low minimum frames.

Yes, it's situational so it will only happen in some scenes, the average will be lower for 12900k.

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You are getting 64 after the new agesa or before? Cause im stuck at 63-64 with 6400c28 tuned to hell. AMD promised an agesa fix for that.

On my 9700x latency is up ~10ns too, and yeah we wait for patch. That's happen after AGESA 1.2.0.2a.

 

[Taraquin]

1.2.0.2a introduced some latency issue afaik, upwards of 7ns. Still present in 1.2.0.2b.

6400 c28-30 with relatively tight timings should be around 58-59ns or better. While the 7900X3D and 9800X3D are different chips, some of my better latency results hit the high 57s at 6400 c30 2133 fclk on the 7900X3D.

Stutter in games can also be a result of fclk instability.

On my 7800X3D I get consistent 1ns better latency with 1.2.0.2a vs previous agesas

 

[phanbuey]

This is 1.2.0.2b.

on 1.2.0.2a my min latency was 68.5ns this dropped it to 64