Question What are average CPU speeds for a threadripper 3950x ?

Feb 27, 2021
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Hello everyone,


I'm trying to setup a threadripper server and when I run sysbench on a single core thread I get something 204 events/seconds. On an intel i17 its like 1451 events/second.



Bash:
sudo  sysbench --test=cpu run

CPU speed:
    events per second:   270.22


Here are the specs.


- Motherboard: https://www.asrockrack.com/general/productdetail.asp?Model=X470D4U

4 sticks of Kingston KSM26ED8/16ME Server Premier - DDR4-16 GB - DIMM 288-pin - 2666 MHz / PC4-21300 - CL19-1.2 V - unbuffered - ECC

- One samsung 970 EVO SSD 500GB - M.2 NVMe



These speeds don't seem right. Thanks for any insight!
 
The 3950X is not a threadripper chip, it's the flagship Ryzen desktop chip.
Anywho, the normal speeds of a 3950x should be around 3.8GHz at base and 4.6GHz single clock boost. On all core boost it should go up to 4 or 4.2GHz on stock settings (varying on the silicon lottery).
 
Feb 27, 2021
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Is there a reason the min Hz is greater than the regular Hz:


Code:
$ sudo lscpu
Architecture:        x86_64
CPU op-mode(s):      32-bit, 64-bit
Byte Order:          Little Endian
Address sizes:       43 bits physical, 48 bits virtual
CPU(s):              32
On-line CPU(s) list: 0-31
Thread(s) per core:  2
Core(s) per socket:  16
Socket(s):           1
NUMA node(s):        1
Vendor ID:           AuthenticAMD
CPU family:          23
Model:               113
Model name:          AMD Ryzen 9 3950X 16-Core Processor
Stepping:            0
CPU MHz:             544.876
CPU max MHz:         4200.0000
CPU min MHz:         2200.0000
 
2200 MHz is still less than 4200 MHz....
:)

You will only see near max (4.6 GHz) for short bursts that involve only a core or two, such as when opening/closing apps, etc...; if you'd like to see what all cores run at with your current cooling solution, run CPU-z/bench/stress CPU

Note the clock speeds/temps in HWmonitor after 10-15 minutes...

For stress tests that run all cores, you are more likely to see 3.8-3.9 GHz or so...

(Be sure to hit 'Stop' in CPU-z to end the test once satisfied with duration of the test, lest you leave it running forever) :)
 

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