[Pc_Support] Re: Great, budget, 'Best Practices' box

[Bryan J. Smith]

On Thu, 2006-07-06 at 15:32 -0500, David Simmons wrote:
> Geez....retract the above....Finally found the AMD X2 datasheet...and it
> lists both the DDR & DDR2 Integrated Memory Controller:

Yes, but the Socket-939 is 384 DDR traces (2x 184-pin DDR).
Socket-AM2 is 480-pin DDR2 traces (2x 240-pin DDR2).

> SO...the X2 will do both DDR and DDR2?...

Forget the "X2" moniker for a moment.
It just means there's an internal crossbar and multiple cores.

The on-die memory controller is either DDR or DDR2.
They can_not_ be both!

> is DDR2 only suppored on an AM2 socketted motherboard?

Correct.
Socket-939 (single and x2) has two (2) DDR channels.
Socket-AM2 (single and x2) has two (2) DDR2 channels.

Multiple cores have _nothing_ to do with DDR v. DDR2.
It's the packaging and on-die memory controller.




> 
> Dave
> 
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-- 
Bryan J. Smith           Professional, technical annoyance
mailto:b.j.smith at ieee.org     http://thebs413.blogspot.com
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