[Petya V4sechkin]

Прикладываю логи KernRate

В вашем логе нет сколько-нибудь значимой загрузки прерываний и/или DPC:

Overall Summary

P0 K 0:00:15.421 (13.2%) U 0:00:18.671 (15.9%) I 0:01:23.000 (70.9%) DPC 0:00:01.515 ( 1.3%) Interrupt 0:00:00.671 ( 0.6%)
Interrupts= 203148, Interrupt Rate= 1735/sec.

P1 K 0:00:13.640 (11.6%) U 0:00:19.890 (17.0%) I 0:01:23.562 (71.4%) DPC 0:00:00.109 ( 0.1%) Interrupt 0:00:00.296 ( 0.3%)
Interrupts= 179951, Interrupt Rate= 1537/sec.

P2 K 0:00:10.640 ( 9.1%) U 0:00:18.312 (15.6%) I 0:01:28.140 (75.3%) DPC 0:00:00.000 ( 0.0%) Interrupt 0:00:00.078 ( 0.1%)
Interrupts= 143348, Interrupt Rate= 1224/sec.

P3 K 0:00:08.546 ( 7.3%) U 0:00:14.750 (12.6%) I 0:01:33.796 (80.1%) DPC 0:00:00.000 ( 0.0%) Interrupt 0:00:00.218 ( 0.2%)
Interrupts= 106023, Interrupt Rate= 905/sec.

TOTAL K 0:00:48.250 (10.3%) U 0:01:11.625 (15.3%) I 0:05:48.500 (74.4%) DPC 0:00:01.625 ( 0.3%) Interrupt 0:00:01.265 ( 0.3%)
Total Interrupts= 632470, Total Interrupt Rate= 5401/sec.