[arch-general] Intel microcode - latest version not loading

Hi all: I'm having an issue with Intel microcode loading. Specifically, the microcode does not appear to be loading the latest version: ~ $ dmesg | grep microcode [ 0.000000] microcode: microcode updated early to revision 0x19, date = 2013-06-21 [ 0.931272] microcode: sig=0x106a5, pf=0x2, revision=0x19 [ 0.931319] microcode: Microcode Update Driver: v2.2. My processor is: ~ $ grep -E 'family|model|stepping' -m 4 /proc/cpuinfo cpu family : 6 model : 26 model name : Intel(R) Xeon(R) CPU W3503 @ 2.40GHz stepping : 5 The Intel website indicates the latest version of microcode for this processor is version 20171117 [1]. However, as indicated above, the version loaded at boot is dated 2013-06-21. I have the latest stable version of intel-ucode installed: ~ $ pacman -Q intel-ucode intel-ucode 20180108-1 I have updated GRUB with , and rebooted. The grub.cfg file shows, as the last line in the menuentry: 'initrd /boot/intel-ucode.img /boot/initramfs-linux.img' I am using a stock kernel: ~ $ uname -a Linux arch2 4.15.5-1-ARCH #1 SMP PREEMPT Thu Feb 22 22:15:20 UTC 2018 x86_64 GNU/Linux Can someone help me determine what is going on here? [1] https://downloadcenter.intel.com/download/27337/Linux-Processor-Microcode-Da...