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The Bulldozer Blog is Live - Page 13  

post #121 of 10602
Quote:
Originally Posted by JF-AMD View Post
We are getting set to re-structure our blog site and there will be a dedicated Bulldozer section that will launch with the new site. Here are the first 2 entries.

Introduction to the Bulldozer Blog:
http://bit.ly/aogYzM

What is Bulldozer:
http://bit.ly/dzPxJt

What you will see in the Bulldozer Blog in the near future:

* "Bulldozer 20 Questions" - we're reviving the popular 20 questions blog, we'll take the best public questions and answer them in the blog over a series of postings.
Excellent. Glad to see that AMD cares about their customers.

I tried posting this on the first 5 of the 20 questions but I don't think it made it:

Question: You've said that Bulldozer is being designed to support DDR-3 however there are AM3 boards that still support DDR-2. Does this mean these AM3 DDR-2 boards will not support Bulldozer or is it too early to tell?

Example: Gigabyte MA785GM-US2H
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post #122 of 10602
I want this YouTube- AMD Athlon Commercial but with Bulldozer
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post #123 of 10602
Thread Starter 
Quote:
Originally Posted by DjiXas View Post
Here's what John might say: I am a server guy
I am a server guy.

As to the software question, I am talking specifically about AVX (256-bit FP). You need to recompile SW to take advantage of it. If you do not, you still get lots of 128-bit executions.

Each pair of cores can issue either 1 256-bit AVX dispatch or 2 128-bit FMAC dispatches per cycle.
post #124 of 10602
After reading a few blogs, it seem bulldozer won't support AM3. Instead Amd will create a new MB called AM3+?

Disappointed.. I was hoping bulldozer would be compatible with current Am3 boards...
I guess I'll just upgrade to a Phenom x4 later on or a 1055t..
    
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post #125 of 10602
By the way, on SA you wrote:

"The slides that are out on the web right now are the press slides. The in-depth hot chips slides are in the hands of some journalists but are under embargo until after our presentation this afternoon."

Can you maybe mention any site that got those slides (so we can follow it) and will publish them after hc is over?
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post #126 of 10602
Thread Starter 
No, I cannot. But, based on the traffic to these threads and the traffic to my blogs this morning, I am betting that by this evening all of the hot chips slides will be out there.
post #127 of 10602
Quote:
Originally Posted by DjiXas View Post
Also, this

Stupid conflicting roadmaps .

post #128 of 10602
Quote:
Originally Posted by decimate View Post
Stupid conflicting roadmaps .

The last one is not official, isn't?
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post #129 of 10602
So after reading the Xbitlabs article published today, it's a done deal as far as Bulldozer and socket compatibility goes...

Quote:
"The existing G34 and C32 server infrastructure will support the new Bulldozer-based server products. In order for AMD’s desktop offering to fully leverage the capabilities of Bulldozer, an enhanced AM3+ socket will be introduced that supports Bulldozer and is backward-compatible with our existing AM3 CPU offerings," an official from AMD said in an interview with Planet3DNow web-site.

Apparently, it was possible for AMD to make Bulldozer microprocessors compatible with existing AM3 infrastructure, but in order to do that, the company would have to sacrifice certain important features of the new core.

"When we initially set out on the path to Bulldozer we were hoping for AM3 compatibility, but further along the process we realized that we had a choice to make based on some of the features that we wanted to bring with Bulldozer. We could either provide AM3 support and lose some of the capabilities of the new Bulldozer architecture or, we could choose the AM3+ socket which would allow the Bulldozer-base Zambezi to have greater performance and capability," the official said.

The compatibility with older microprocessors allows AMD to simplify transition to the new micro-architecture and process design since the new AM3+ platform will support inexpensive chips from day one. However, such compatibility also means that AMD Zambezi processors will only support dual-channel memory controller. Considering the fact that all modern high-end Intel Core i7 processors with up to six cores feature triple-channel memory controller, it is unclear how AMD plans to "feed" eight cores of Zambezi with dual-channel DDR3 without creating bottlenecks.
http://www.xbitlabs.com/news/cpu/dis...forms_AMD.html

Obviously, AMD could still release a gimped Bulldozer CPU for AM3, but I really don't see any incentive for them to do that...
post #130 of 10602
While I feel sorry for those that have bought AM3 sockets based on the assumption of it being bulldozer compatible, or on the advice given to them, I think that changing sockets was the correct decision to make - AMD really needs to make progress, and you cannot do that by shoe horning new tech into yesterday's sockets. This has, indubitable, been a crucial selling point for many, AMD needs to go for Intel's Jugular, and the change of sockets is, to me, a statement of intent- that they are (finally) going for the ultimate performance crown.

On a side note, when will we see Quad Channel Memory in high end clients?
    
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