Comments on: Checking Your Intel Processor Features Regarding the Meltdown Exploit

By: mansmfr1

mansmfr1 — Fri, 19 Jan 2018 18:51:11 +0000

I have a i7-3770s (the low power version) and it also has PCID = yes, but INVPCID = no
It is a nice CPU and machine for running some (Hyper-V) VMs, but obviously now getting too old…. 🙁

By: James

James — Thu, 18 Jan 2018 16:13:21 +0000

actually microsoft has NOT patched Meltdown CVE 2017-5754 on x86 systems (32bit) yet.

only x64 bit systems to be protected…. for Meltdown (as long as your antivirus is compatible too)

What I would like to know is which OS’s actually support PCID / INVPCID if you have it… as it seems windows 7 might not support it anyway.

By: Martin

Martin — Thu, 18 Jan 2018 13:12:57 +0000

In reply to Matt. You are right. Goldmount doesn't have support for PCID so also not INVPCID. I've just checked my J3455 Celeron (inside Apollo Lake Intel NUC).

By: Matt

Matt — Fri, 12 Jan 2018 22:32:07 +0000

An important issue that seems to have gone unreported, including by Microsoft, is there are a whole host of low-end, low power Intel processors that are still being sold and have no PCID support, let alone INVPCID.

Airmont Atom, Celeron and Pentium SKUs, for example, have been deployed in huge numbers by businesses, schools, etc, and face significant slowdowns on top of already miserable performance. Even Goldmont models don’t support INVPCID – they may also not even support PCID, but I don’t have hardware available to test at the moment.