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As the title says, `lscpu` shows that two of my Efficiency cores have a maximum frequency limit of 6.5 GHz (core 12 and core 13).
I'm unsure whether this is merely a display issue or a potential warning sign of hardware damage, so I'd like to consult the Arch Linux community.
lscpu -e Output:
CPU NODE SOCKET CORE L1d:L1i:L2:L3 ONLINE MAXMHZ MINMHZ MHZ
0 0 0 0 0:0:0:0 yes 5400.0000 800.0000 2918.6790
1 0 0 1 4:4:1:0 yes 5500.0000 800.0000 2986.8110
2 0 0 2 16:16:4:0 yes 5500.0000 800.0000 3764.1101
3 0 0 3 20:20:5:0 yes 5400.0000 800.0000 4115.9512
4 0 0 4 24:24:6:0 yes 5400.0000 800.0000 800.0000
5 0 0 5 28:28:7:0 yes 5400.0000 800.0000 1217.8080
6 0 0 6 40:40:10:0 yes 5400.0000 800.0000 1167.6000
7 0 0 7 44:44:11:0 yes 5400.0000 800.0000 800.0000
8 0 0 8 3:0 yes 4600.0000 800.0000 2300.3960
9 0 0 9 26:26:3:0 yes 4600.0000 800.0000 999.9490
10 0 0 10 3:0 yes 4600.0000 800.0000 997.7910
11 0 0 11 30:30:3:0 yes 4600.0000 800.0000 2247.9351
12 0 0 12 64:64:8:0 yes 6500.0000 800.0000 800.0000
13 0 0 13 66:66:8:0 yes 6500.0000 800.0000 800.0000
14 0 0 14 68:68:8:0 yes 4600.0000 800.0000 1975.0000
15 0 0 15 70:70:8:0 yes 4600.0000 800.0000 2615.4470
16 0 0 16 72:72:9:0 yes 4600.0000 800.0000 2645.8669
17 0 0 17 74:74:9:0 yes 4600.0000 800.0000 2301.0510
18 0 0 18 76:76:9:0 yes 4600.0000 800.0000 2300.6040
19 0 0 19 78:78:9:0 yes 4600.0000 800.0000 2593.3330I couldn't clearly distinguish the P-cores from the E-cores in the output above, so I searched online and learned that P-cores and E-cores are differentiated by their highest_perf score. To that end, I printed the relevant information from my system.
for i in `seq 0 19`; do echo "$i => $(cat /sys/devices/system/cpu/cpu$i/acpi_cppc/highest_perf) => $(cat /sys/devices/system/cpu/cpu$i/cpufreq/cpuinfo_max_freq)Hz"; doneOutput:
0 => 87 => 5400000Hz
1 => 88 => 5500000Hz
2 => 88 => 5500000Hz
3 => 87 => 5400000Hz
4 => 87 => 5400000Hz
5 => 87 => 5400000Hz
6 => 87 => 5400000Hz
7 => 87 => 5400000Hz
8 => 65 => 4600000Hz
9 => 65 => 4600000Hz
10 => 65 => 4600000Hz
11 => 65 => 4600000Hz
12 => 65 => 6500000Hz
13 => 65 => 6500000Hz
14 => 65 => 4600000Hz
15 => 65 => 4600000Hz
16 => 65 => 4600000Hz
17 => 65 => 4600000Hz
18 => 65 => 4600000Hz
19 => 65 => 4600000HzLooking at the information above, cores 12 and 13 should be E-cores, yet their max_freq is listed as 6.5 GHz—well above the Ultra 7 265K's official maximum.
I ran a stress test on core 12 and it never actually reached 6.5 GHz.
taskset -c 12 stress -c 1 & sudo turbostat --quiet --show Core,CPU,Bzy_MHzOutput:
[1] 23132
stress: info: [23132] dispatching hogs: 1 cpu, 0 io, 0 vm, 0 hdd
Core CPU Bzy_MHz
- - 3892
0 0 1440
4 1 2247
12 8 4388
13 9 4059
14 10 4321
15 11 4228
16 2 2119
20 3 2358
24 4 1985
28 5 2486
32 12 4581
33 13 4454
34 14 4520
35 15 4509
36 16 4496
37 17 3819
38 18 3449
39 19 3895
40 6 2421
44 7 1397
Core CPU Bzy_MHz
- - 3880
0 0 1627
4 1 2073
12 8 4389
13 9 4217
14 10 4345
15 11 4247
16 2 1979
20 3 2223
24 4 1711
28 5 2128
32 12 4573
33 13 4591
34 14 4562
35 15 4513
36 16 4205
37 17 3542
38 18 4332
39 19 4421
40 6 2121
44 7 1734
Core CPU Bzy_MHz
- - 3844
0 0 1842
4 1 2270
12 8 4324
13 9 4016
14 10 3937
15 11 4244
16 2 2396
20 3 2283
24 4 1990
28 5 1935
32 12 4578
33 13 4525
34 14 4546
35 15 4461
36 16 4105
37 17 3021
38 18 3840
39 19 4454
40 6 2227
44 7 1695
Core CPU Bzy_MHz
- - 3813
0 0 1280
4 1 2140
12 8 4180
13 9 4393
14 10 4288
15 11 4296
16 2 2226
20 3 2084
24 4 1553
28 5 1425
32 12 4578
33 13 4461
34 14 4339
35 15 4293
36 16 3727
37 17 3079
38 18 3669
39 19 3627
40 6 1754
44 7 2382
Core CPU Bzy_MHz
- - 3865
0 0 1647
4 1 2229
12 8 4368
13 9 4181
14 10 4168
15 11 4284
16 2 2391
20 3 2984
24 4 2065
28 5 2037
32 12 4580
33 13 4459
34 14 4535
35 15 4505
36 16 4085
37 17 3945
38 18 4218
39 19 3613
40 6 1412
44 7 2218
Core CPU Bzy_MHz
- - 3933
0 0 2424
4 1 2449
12 8 4214
13 9 3743
14 10 4265
15 11 4334
16 2 2523
20 3 2727
24 4 2083
28 5 1546
32 12 4577
33 13 4413
34 14 4473
35 15 4381
36 16 3816
37 17 3722
38 18 4087
39 19 3846
40 6 1264
44 7 1637
Core CPU Bzy_MHz
- - 3980
0 0 2205
4 1 2440
12 8 4323
13 9 4211
14 10 4238
15 11 3549
16 2 2491
20 3 2317
24 4 1774
28 5 1486
32 12 4578
33 13 4499
34 14 4529
35 15 4554
36 16 4279
37 17 3765
38 18 3774
39 19 4258
40 6 3573
44 7 1815
Core CPU Bzy_MHz
- - 3888
0 0 1009
4 1 1962
12 8 4397
13 9 4419
14 10 4303
15 11 4202
16 2 2023
20 3 1919
24 4 1753
28 5 1171
32 12 4575
33 13 4550
34 14 4548
35 15 4574
36 16 4164
37 17 3493
38 18 4172
39 19 4021
40 6 1768
44 7 2025
Core CPU Bzy_MHz
- - 3908
0 0 2122
4 1 1889
12 8 4397
13 9 4388
14 10 4363
15 11 4416
16 2 2111
20 3 2231
24 4 1524
28 5 1318
32 12 4579
33 13 4561
34 14 4537
35 15 4522
36 16 4168
37 17 3689
38 18 3797
39 19 4172
40 6 1382
44 7 1558Last edited by tiantian (2025-11-06 14:51:06)
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