backtop


Print 59 comment(s) - last by peternelson.. on Jul 11 at 9:01 PM

AM2 motherboard owners rejoice, AM2 has a long future

AMD has released details of its next-generation desktop CPU interface, Socket AM3, to its OEM partners.  In a mildly surprising move, AMD has revealed that AM2 will accept AM2 or AM3 (also dubbed AM2+) CPU packages.  Additionally, recent roadmaps have confirmed that AM3, AMD's upcoming desktop CPU socket, will not be backwards compatible with AM2-package CPUs.  Roadmaps and memos have also confirmed that this AM3 package will be for AMD's "K8L" architecture, and not for the upcoming 65nm AM2 Brisbane CPUs scheduled for launch this December.

The most recent AMD roadmap is also very clear to state AM3 "supports either DDR2 SDRAM or DDR3 SDRAM, but not on the same motherboard."  This is great news for upgraders, as there is a very clear upgrade path: CPU, motherboard, and then memory.  This also infers that AM3 CPUs will have both DDR2 and DDR3 support on the integrated memory controller.  DDR3, like DDR2, has 240-pin, but the two formats are not pin-compatible.

As we also mentioned earlier, Greyhound will be the first desktop processor to support HyperTransport 3.0. Part of the specification for HT-3 is backwards compatibility with older revisions of HyperTransport, and the forward compatibility of the AM2 socket confirms that.  However, it’s important to mention that even though AM3 CPUs will work in the AM2 socket, HT-3 allows for 5.2 Giga-transfers per second, while current AM2 motherboards top out at 2.0 Giga-transfers per second.  Even though the additional headroom is likely not completely necessary, quad-core CPUs will certainly benefit from the additional bandwidth to additional CPUs or co-processors.

There is no word yet on the number of pins the new socket will require, but since AM2 sockets are forward compatible with AM3 CPUs, we can at least deduct that AM3 will have fewer than 940 pins.  Furthermore, since Socket AM2 is forwards compatible with AM3 CPUs, it is also safe to say that AM3 is not a land-grid array (LGA) socket.  AMD will switch its Opteron platform to an LGA-1207 socket on August 1, 2006.  AMD has not announced when Socket AM3 will be released, although since it would be the first HT-3 "ready" socket design, it seems likely that K8L and AM3 for the desktop will launch simultaneously.



Comments     Threshold


This article is over a month old, voting and posting comments is disabled

By nserra on 7/6/2006 9:23:46 AM , Rating: 2
defter,

I put -> DDR2 400/533 ->
in the same line because of that.

I have a very old KT133A (DFI) and worked fine.
My friends others, Chaintec, ECS, ... some say Athlon4 or Athlon MP, but works. There is one with Via KT133 (100Mhz FSB) works great at 120Mhz bus (Gigabyte) and detects Athlon XP.
I believe in you, some work other not, but I bet is 98%, 2%. Just look what ASROCK they put some chipsets working with processors that Intel say doesn’t work. Conroe on 865G?
http://www.asrock.com/product/775i65G.htm

Right K8 was launched after DDR400, and AMD2 was launched before DDR2 800 and DDR2 1066.

I think socket 940 where only assigned to FX and Opteron so doesn’t really count as desktop (0,001% of the desktops).

And from the same link you provided:
VIA KT133A is fully compatible with Athlon XP CPUs.
Many KT133A based mainboards from other manufacturers (independent of the revision number) work fine with Athlon XP.
Athlon XP processor uses the same Socket A physical interface as the regular Athlon (Thunderbird) does, that is why lame excuses of ABIT’s representatives about the lack of the final Athlon XP specs look very unconvincing. Especially, since AMD-760 based mainboards, which appeared even before those on KT133A (we don’t mean the awfully long delayed ABIT KG7), do not have any problems working with Athlon XP processors, and it means that the final processor specs have nothing to do with it.


"People Don't Respect Confidentiality in This Industry" -- Sony Computer Entertainment of America President and CEO Jack Tretton

Related Articles













botimage
Copyright 2014 DailyTech LLC. - RSS Feed | Advertise | About Us | Ethics | FAQ | Terms, Conditions & Privacy Information | Kristopher Kubicki