> The physical machine is a Toshiba Satellite core duo at 1.66 GHz and 1.5
> gigs of RAM, a 5400 rpm hard drive, and a rather crappy video sub-system.
>
> Running Virtual PC with two Server 2003 and one XP VMs. Performance on
> all VMs is below expectations, whether or not one, two or three are
> running. I have VPC set to pause the background VM. I am guessing the
> bottlenecks are the slow disk and the video. However, the guest operating
> system detects the CPU as running at a half dozen different speeds.
> Sometimes at 351 MHz, sometimes at 390 MHz, sometimes at 459 MHz, etc.,
> and sometimes correctly at 1.66 GHz.
>
> Anyone know what is going on?
>
> Thanks much,
>
> Mike
>

>Yes indeed it does. But the "always on" power scheme is supposed to
>override the processor throttling (it doesn't) and SpeedswitchXP, running on
>the host _or_ on the guest, or both, has a only a very slight effect. The
>VMs also have a very annoying habit:- a few things will be processed at
>normal speed, then the virtual machine will freeze up for anywhere from five
>to twenty seconds. This will happen during activity, from typing, to
>opening menus, to copying a large directory to a virtual drive
>
>I haven't tried the MSFT patches because it behaves properly when coming out
>of standby or hibernation, and the chipset in the machine is Intel's 945
>rather than 915. Could the 945 be close enough to the 915 to use the same
>patch?

> That sounds like the old Speedstep problem with VPC and laptops.
>
> http://blogs.msdn.com/virtual_pc_guy/archive/2005/09/19/471612.aspx
>
> http://blogs.msdn.com/virtual_pc_guy/archive/2006/07/18/670342.aspx
>
>
> "dubya" <(email address - cut out)> wrote in message
> news:(email address - cut out)...
>> The physical machine is a Toshiba Satellite core duo at 1.66 GHz and 1.5
>> gigs of RAM, a 5400 rpm hard drive, and a rather crappy video sub-system.
>>
>> Running Virtual PC with two Server 2003 and one XP VMs. Performance on
>> all VMs is below expectations, whether or not one, two or three are
>> running. I have VPC set to pause the background VM. I am guessing the
>> bottlenecks are the slow disk and the video. However, the guest
>> operating system detects the CPU as running at a half dozen different
>> speeds. Sometimes at 351 MHz, sometimes at 390 MHz, sometimes at 459 MHz,
>> etc., and sometimes correctly at 1.66 GHz.
>>
>> Anyone know what is going on?
>>
>> Thanks much,
>>
>> Mike
>>
>
>

> On Sat, 16 Sep 2006 23:47:38 -0400, "dubya" <(email address - cut out)>
> wrote:
>
>>Yes indeed it does. But the "always on" power scheme is supposed to
>>override the processor throttling (it doesn't) and SpeedswitchXP, running
>>on
>>the host _or_ on the guest, or both, has a only a very slight effect. The
>>VMs also have a very annoying habit:- a few things will be processed at
>>normal speed, then the virtual machine will freeze up for anywhere from
>>five
>>to twenty seconds. This will happen during activity, from typing, to
>>opening menus, to copying a large directory to a virtual drive
>>
>>I haven't tried the MSFT patches because it behaves properly when coming
>>out
>>of standby or hibernation, and the chipset in the machine is Intel's 945
>>rather than 915. Could the 945 be close enough to the 915 to use the same
>>patch?
>
> The patches do more than fix the described problems and seem to work
> beyond the 915 chipset.
>
> --
> Cheers,
> Steve Jain, Virtual Machine MVP
> http://vpc.essjae.com/
> I do not work for Microsoft.