Why cpu frequency on Dell Precision 3660 running Intel i9-12900k drops to 800MHz when workload is ran on all cores?

Issue

• Why cpu frequency on Dell Precision 3660 running Intel i9-12900k drops to 800MHz when workload is ran on all cores?

$ grep .  sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq|column -t -s:
sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq   774890
sys/devices/system/cpu/cpu10/cpufreq/scaling_cur_freq  801858
sys/devices/system/cpu/cpu11/cpufreq/scaling_cur_freq  800564
sys/devices/system/cpu/cpu12/cpufreq/scaling_cur_freq  800000
sys/devices/system/cpu/cpu13/cpufreq/scaling_cur_freq  801111
sys/devices/system/cpu/cpu14/cpufreq/scaling_cur_freq  803011
sys/devices/system/cpu/cpu15/cpufreq/scaling_cur_freq  801011
sys/devices/system/cpu/cpu16/cpufreq/scaling_cur_freq  800336
sys/devices/system/cpu/cpu17/cpufreq/scaling_cur_freq  799998
sys/devices/system/cpu/cpu18/cpufreq/scaling_cur_freq  799450
sys/devices/system/cpu/cpu19/cpufreq/scaling_cur_freq  800465
sys/devices/system/cpu/cpu1/cpufreq/scaling_cur_freq   801075
sys/devices/system/cpu/cpu20/cpufreq/scaling_cur_freq  799646
sys/devices/system/cpu/cpu21/cpufreq/scaling_cur_freq  799999
sys/devices/system/cpu/cpu22/cpufreq/scaling_cur_freq  798148
sys/devices/system/cpu/cpu23/cpufreq/scaling_cur_freq  800011
sys/devices/system/cpu/cpu2/cpufreq/scaling_cur_freq   802188
sys/devices/system/cpu/cpu3/cpufreq/scaling_cur_freq   800000
sys/devices/system/cpu/cpu4/cpufreq/scaling_cur_freq   800000
sys/devices/system/cpu/cpu5/cpufreq/scaling_cur_freq   800833
sys/devices/system/cpu/cpu6/cpufreq/scaling_cur_freq   800000
sys/devices/system/cpu/cpu7/cpufreq/scaling_cur_freq   784059
sys/devices/system/cpu/cpu8/cpufreq/scaling_cur_freq   800000
sys/devices/system/cpu/cpu9/cpufreq/scaling_cur_freq   800000

Core  CPU  Avg_MHz  Busy%  Bzy_MHz  TSC_MHz  POLL  C1E    C6  C8  C10  POLL%  C1E%   C6%   C8%   C10%  CPU%c1  CPU%c6  CPU%c7
-     -    65       8.10   799      3187     601   55644  0   0   0    0.01   91.93  0.00  0.00  0.00  91.90   0.00    0.00
0     0    43       5.34   796      3187     68    10068  0   0   0    0.05   94.80  0.00  0.00  0.00  94.66   0.00    0.00
0     1    82       10.24  799      3187     51    3077   0   0   0    0.03   89.78  0.00  0.00  0.00  89.76
4     2    65       8.13   797      3187     33    7794   0   0   0    0.02   91.96  0.00  0.00  0.00  91.87   0.00    0.00
4     3    9        1.11   796      3187     5     525    0   0   0    0.00   98.89  0.00  0.00  0.00  98.89
8     4    37       4.63   797      3187     0     633    0   0   0    0.00   95.37  0.00  0.00  0.00  95.37   0.00    0.00
8     5    219      27.41  798      3187     3     3025   0   0   0    0.00   72.57  0.00  0.00  0.00  72.59
12    6    295      37.03  798      3187     1     1356   0   0   0    0.00   62.90  0.00  0.00  0.00  62.97   0.00    0.00
12    7    4        0.50   793      3187     0     323    0   0   0    0.00   99.51  0.00  0.00  0.00  99.50
16    8    143      17.88  799      3187     73    1108   0   0   0    0.00   82.09  0.00  0.00  0.00  82.12   0.00    0.00
16    9    13       1.60   799      3187     0     1309   0   0   0    0.00   98.41  0.00  0.00  0.00  98.40
20    10   205      25.62  799      3187     114   2860   0   0   0    0.01   74.36  0.00  0.00  0.00  74.38   0.00    0.00
20    11   4        0.55   794      3187     0     368    0   0   0    0.00   99.45  0.00  0.00  0.00  99.45
24    12   35       4.38   800      3187     1     407    0   0   0    0.00   95.61  0.00  0.00  0.00  95.62   0.00    0.00
24    13   5        0.60   793      3187     1     591    0   0   0    0.00   99.41  0.00  0.00  0.00  99.40
28    14   4        0.56   799      3187     0     1101   0   0   0    0.00   99.46  0.00  0.00  0.00  99.44   0.00    0.00
28    15   4        0.49   795      3187     0     176    0   0   0    0.00   99.51  0.00  0.00  0.00  99.51
32    16   5        0.57   800      3187     2     1562   0   0   0    0.00   99.46  0.00  0.00  0.00  99.43   0.00    0.00
33    17   3        0.36   800      3187     0     660    0   0   0    0.00   99.65  0.00  0.00  0.00  99.64   0.00    0.00
34    18   122      15.30  800      3187     239   5893   0   0   0    0.13   84.77  0.00  0.00  0.00  84.70   0.00    0.00
35    19   3        0.36   800      3187     0     1345   0   0   0    0.00   99.66  0.00  0.00  0.00  99.64   0.00    0.00
36    20   5        0.63   800      3187     3     2600   0   0   0    0.00   99.41  0.00  0.00  0.00  99.37   0.00    0.00
37    21   227      28.39  800      3187     5     4279   0   0   0    0.00   71.62  0.00  0.00  0.00  71.61   0.00    0.00
38    22   10       1.25   800      3187     0     2208   0   0   0    0.00   98.78  0.00  0.00  0.00  98.75   0.00    0.00
39    23   11       1.42   800      3187     2     2376   0   0   0    0.00   98.62  0.00  0.00  0.00  98.58   0.00    0.00