RE: [Xen-users] Warning regarding AMD Athalon 64 4200+(HVM/AMD-V)

["Petersson, Mats" <Mats.Petersson@xxxxxxx>]

> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Ulrich Windl
> Sent: 02 November 2006 07:44
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-users] Warning regarding AMD Athalon 64 
> 4200+(HVM/AMD-V)
> 
> On 1 Nov 2006 at 11:41, Tim Post wrote:
> 
> > Be sure to get Revision F (AM2 socket) and 1207 socket, not 
> the 939/940
> > socket. Chances are you're only going to run into those 
> with HP labeled
> > servers.
> > 
> 
> I'm by no means a specialist, but when trying to find out 
> which AMD CPUs would 
> support AMD-V, I got the impression that no socket 939 
> supports AMD-V, but only 
> AM2 verisons. I'm not saying that any AM2 socket CPU does 
> support AMD-V.
> My question now is: does AMD-V require extra hardware pins?

Not in itself, however, the update of the processor architecture with
the AMD-V features coincides with the update of the memory controller to
support DDR2, which I believe requires exactly the same NUMBER of pins,
but they are behaving slightly different, so therefore there's a good
oppurtunity to change the socket - I'm not a socket architect, so I
don't know what the exact reasons for the new socket is, but since the
old motherboards won't work with the new processor even if it had the
same socket, it doesn't really matter if they are the same or not [DDR2
and DDR1 are NOT directly compatible - although you could most likely
build a memory controller that supports both].
> 
> My tip for AMD marketing: Add a table "Which CPUs do dupport AMD-V"...

Thanks - I've already thought of that, unfortunately, the web-team
hasn't got it in there yet... And I have no real answer to when they
will... 

As for now, the key is "Supports DDR2 memory and isn't called Sempron". 

> 
> I have socket 939 Athlon 64 X2 3800+, so probably I've lost...

You've got a great processor, but it's not AMD-V capable... 
--
Mats

> 
> Regards,
> Ulrich
> 
> 
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