Comments on: Host CPU incompatible when booting 64bit Virtual Machine

By: Giuliano

Giuliano — Wed, 20 Jan 2010 13:58:03 +0000

Thanks a lot! it works, i’m very happy!!!!!!!!

By: ilissan

ilissan — Wed, 02 Dec 2009 09:21:25 +0000

Thanks! Great works like a charm!

By: Andrew

Andrew — Tue, 18 Aug 2009 09:31:17 +0000

Can someone help me I am new with ESX and I found as You posted 0×800000001 register edx

and what should I do with that:

RRTR HRRR RRRH RRRR RRRR XRRR RRRR RRRR

What should i put in there?

Thx for help

By: LodgeCat

LodgeCat — Thu, 04 Jun 2009 14:42:06 +0000

Sure glad you figured this out…Nice Work!

By: Carter

Carter — Tue, 19 May 2009 14:56:46 +0000

Thanks! This did the trick for me.

By: sumeet

sumeet — Fri, 01 May 2009 21:07:54 +0000

Thanks for posting this.

By: Daniel Ruiz

Daniel Ruiz — Fri, 26 Sep 2008 21:02:25 +0000

You are the man… thanks for posting. I was tearing out my hair

I had to change it from:
—- —- —H —- —- —- —- —-

to:
–1- —- —- —- —- —- —- —-

on ESX 3.5

Daniel

By: Roger Zan

Roger Zan — Mon, 15 Sep 2008 04:50:36 +0000

I figured out the solution. You have to go to the CPUID mask for the VM Advanced Options and change the 0×800000001 register edx to

–1- —- —- —- —- —- —- —-

By default it’s set to:

—- —- —1 —- —- —- —- —-

The dashes are 0 bits.

Once you make this change, you should be able to start up the x64 VM without a problem. It’s stupid that this needs to be done, but until VMWare figures out a way to correct this, I guess this tweak will have to do.