Quote from: jakkwb on January 28, 2020, 03:46:16 PM

Hello, been following this thread for a while now. Could not find an answer to this if someone could clue me in:

do the Xeon E7-4830s not perform like they should for hashrates? It has enough L3 cache.

I am going to assume that these are the original Westmere Microarchitecture from 2011 as you didn't state V2, V3 or V4.

Intel Xeon E7-4830 specifications
http://www.cpu-world.com/CPUs/Xeon/Intel-Xeon%20E7-4830%20AT80615007089AA%20(BX80615E74830).html

Also assuming that you are looking to mine RandomX (and variants).

The L2 cache on the Xeon E7-4830 limits it to the maximum of 8 threads.

RandomX needs 256kb of L2 cache and 2mb L3 cache per mining thread.

Xeon E7-4830 has:
Level 2 cache size: 8 x 256 KB <-- this limits the Xeon E7-4830 to only 8 threads
Level 3 cache size: 24 MB

You might want to look at upgrading to better (more cores) or faster ones for more performance.

The best way to judge performance differences between processors is to note the Maximum turbo frequency while using all the cores:

So using the Xeon E7-4830 is: 8 (cores) times 2.267 GHz equals 18.136 which will be the BASE for reference

now comparing to:

Xeon E7-4850: 10 (cores) times 2.133 GHz equals 21.33 or 17.6% faster
Xeon E7-4860: 10 (cores) times 2.400 GHz equals 24 or 32.3% faster
Xeon E7-4870: 10 (cores) times 2.533 GHz equals 25.33 or 39.7% faster

Intel Xeon E7-4800 microprocessor family
http://www.cpu-world.com/CPUs/Xeon/TYPE-Xeon%20E7-4800.html

You may also want to consider the E7-8800 series as they are plug compatible with the E7-4800 series, The HP DL580 servers can use the 8800 processors. Be sure to check if your system can use the 8800 processors.

Intel Xeon E7-8800 microprocessor family
http://www.cpu-world.com/CPUs/Xeon/TYPE-Xeon%20E7-8800.html

Xeon E7-8837: 8 (cores) times 2.800 GHz equals 22.4 or 23.5% faster
Xeon E7-8867L: 10 (cores) times 2.267 GHz equals 22.67 or 25% faster
Xeon E7-8870: 10 (cores) times 2.533 GHz equals 25.33 or 39.7% faster