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Nagmaal

My experience with Ryzen 2700x & P3d v4.4

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According to several test sites (one at the end as an example), while one can't really o/c the core speed, if you o/c the Infinity Fabric speed as well as memory (memory, only to a point, then surprisingly it slows down), you can get a good boost -- see https://www.youtube.com/watch?v=Ssuqhyqah2k 

Also, new, expensive MSI X570 Motherboard with all the bells and whistles -- https://www.guru3d.com/articles-pages/msi-meg-x570-godlike-review,22.html.

 


Gigabyte x670 Aorus Elite AX MB; AMD 7800X3D CPU; Deepcool LT520 AIO Cooler; 64 Gb G.Skill Trident Z5 NEO DDR5 6000; Win11 Pro; P3D V5.4; 1 Samsung 990 2Tb NVMe SSD: 1 Crucial 4Tb MX500 SATA SSD; 1 Samsung 860 1Tb SSD; Gigabyte Aorus Extreme 1080ti 11Gb VRAM; Toshiba 43" LED TV @ 4k; Honeycomb Bravo.

 

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Yes, I mentioned earlier that these high frequencies don't necessarily scale too well. When the system shows a drop off or a flat spot that could mean some part of the system has reached a limit. Scaling beyond can also mean decreased performance overall.


Steve Waite: Engineer at codelegend.com

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Let's simplify it really badly, even so I think can still be a good representation of what's going to happen:

Say we have one architecture with 10 instructions per cycle and another with 8.

To complete the instructions requires filling the data values or parameters. With the latest CPUs they have a number of sub processors that are constantly analysing the code for branch prediction. This leads to predicting the memory pages that will be required to obtain the values in time. That's complicated by which cores are being utilised, and by how many can concurrently be supported.

You might find your 8 core running cores at 35% produces a smoother simulation using six cores running 60%.

When we get an out come we might find that the 10IPC chip completes on average 5 instructions, and the 8IPC chip averages 6 instructions.


Steve Waite: Engineer at codelegend.com

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