update Intel microcode

How to update Intel microcode properly?

I7-7700 ubuntu 17.10
user@ud17:~$ dmesg | grep microcode
[    0.000000] [Firmware Bug]: TSC_DEADLINE disabled due to Errata; please update microcode to version: 0x52 (or later)
[    0.758901] microcode: sig=0x906e9, pf=0x2, revision=0x42
[    0.759139] microcode: Microcode Update Driver: v2.2.

user@ud17:~$  grep -E 'model|stepping' /proc/cpuinfo | sort -u
model        : 158
model name    : Intel(R) Core(TM) i7-7700 CPU @ 3.60GHz
stepping    : 9

sudo apt-get install microcode.ctl intel-microcode

sudo reboot

user@ud17:~$ dmesg | grep microcode
[    0.000000] microcode: microcode updated early to revision 0x5e, date = 2017-04-06
[    0.766883] microcode: sig=0x906e9, pf=0x2, revision=0x5e
[    0.767178] microcode: Microcode Update Driver: v2.2.
 

I7-6700 ubuntu 16.04.3

user@u16:~$  dmesg | grep microcode
[    0.798905] microcode: CPU0 sig=0x506e3, pf=0x2, revision=0xa0
[    0.799215] microcode: CPU1 sig=0x506e3, pf=0x2, revision=0xa0
[    0.799429] microcode: CPU2 sig=0x506e3, pf=0x2, revision=0xa0
[    0.799695] microcode: CPU3 sig=0x506e3, pf=0x2, revision=0xa0
[    0.800052] microcode: CPU4 sig=0x506e3, pf=0x2, revision=0xa0
[    0.800327] microcode: CPU5 sig=0x506e3, pf=0x2, revision=0xa0
[    0.800547] microcode: CPU6 sig=0x506e3, pf=0x2, revision=0xa0
[    0.800830] microcode: CPU7 sig=0x506e3, pf=0x2, revision=0xa0


user@u16:~$  grep -E 'model|stepping' /proc/cpuinfo | sort -u
model           : 94
model name      : Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz
stepping        : 3

sudo apt-get install microcode.ctl intel-microcode 

sudo reboot

user@u16:~$ dmesg | grep "updated"
[    0.000000] microcode: CPU0 microcode updated early to revision 0xba, date = 2017-04-09
[    0.102351] microcode: CPU1 microcode updated early to revision 0xba, date = 2017-04-09
[    0.106732] microcode: CPU2 microcode updated early to revision 0xba, date = 2017-04-09
[    0.111071] microcode: CPU3 microcode updated early to revision 0xba, date = 2017-04-09