Since we reported on the AMD Bulldozer hotfix, The Tech Report reports in an updated post, that the Bulldozer threading hotfix said to improve performance of the processor, has been pulled:

We’ve spoken with an industry source familiar with this situation, and it appears the release of this hotfix was either inadvertent, premature, or both. There is indeed a Bulldozer threading patch for Windows in the works, but it should come in two parts, not just one. The patch that was briefly released is only one portion of the total solution, and it may very well reduce performance if used on its own. We’re hearing the full Windows update for Bulldozer performance optimization is scheduled for release in Q1 of 2012. For now, Bulldozer owners, the best thing to do is to sit tight and wait.

It will be very interesting indeed to see how this much maligned processor benchmarks after the fully developed patch is released. It’s true, actually attempting to download the hotfix and agreeing to the licence terms, at the moment, one is lead to a page that shows it as unavailable.

處理器

根據媒體xbitlabs報導,Bulldozer與Fusion APU“Llano”兩個系列處理器的上市時間定案,分別是2011年9月19日跟2012年第一季。[10]

[编辑] 處理器列表

最初有4個Bulldozer處理器在2011年9月19日發佈[11],分別是:四核心 FX-4100、六核心 FX-6100、八核心 FX-8150、FX-8120。

型号 FX-8170 FX-8150 FX-8120 FX-8100 FX-6120 FX-6100 FX-4120 FX-4100 FX-3150
开发代号 Zambezi
核心数 8 8 8 8 6 6 4 4 3
时钟频率 3.9 GHz 3.6 GHz 3.1 GHz 2.8 GHz 3.6 GHz 3.3 GHz 3.9 GHz 3.6 GHz 3.6 GHZ
加速频率 4.5 GHz 4.2 GHz 4.0 GHz 3.7 GHz 4.2 GHz 3.9 GHz 4.1 GHz 3.8 GHz 4.2 GHZ
二级缓存 8MB 8MB 8MB 8MB 6MB 6MB 4MB 4MB 3MB
三级缓存 8MB
TDP 125瓦特 125瓦特 125瓦特 95瓦特 95瓦特 95瓦特 95瓦特 95瓦特 80瓦特
内存带宽 1866MT/s
黑盒
智能加速
接口 AM3+
工艺 32 nm SOI

[编辑] KB2592546

微軟的最新定義為下表:Microsoft定義AMD FX核心数目划为FX-8000、FX-6000、FX-4000三种型号,分别为四核心八執行緒(4C8T)、三核心六執行緒(3C6T)、二核心四執行緒(2C4T)……等版本。

型号 FX-8170 FX-8150 FX-8120 FX-8100 FX-6120 FX-6100 FX-4120 FX-4100 FX-3150
开发代号 Zambezi
模組[12] 4 4 4 4 3 3 2 2 2
核心数[13] 4 4 4 4 3 3 2 2 1.5
執行緒 8 8 8 8 6 6 4 4 3
时钟频率 3.9 GHz 3.6 GHz 3.1 GHz 2.8 GHz 3.6 GHz 3.3 GHz 3.9 GHz 3.6 GHz 3.6 GHZ
加速频率 4.5 GHz 4.2 GHz 4.0 GHz 3.7 GHz 4.2 GHz 3.9 GHz 4.1 GHz 3.8 GHz 4.2 GHZ
二级缓存 8MB 8MB 8MB 8MB 6MB 6MB 4MB 4MB 3MB
三级缓存 8MB
TDP 125瓦特 125瓦特 125瓦特 95瓦特 95瓦特 95瓦特 95瓦特 95瓦特 80瓦特
内存带宽 1866MT/s
黑盒
智能加速
接口 AM3+
工艺 32 nm SOI

微軟在KB2592546之後,針對以Win7Windows Server 2008 R2為基礎的電腦,進行最佳化。目前,AMD推土機處理器比預期的慢。因為在該兩種作業系統的執行緒邏輯,沒有利用同步多執行緒(Simultaneous Multithreading, SMT)的排程特色,讓效能最有效地運行。[14]

Source: http://www.techpowerup.com/156972/AMD-Bulldozer-Threading-Hotfix-Pulled.html

Related: http://zh.wikipedia.org/wiki/AMD_Bulldozer

My Comments:

The reason why Bulldozer has poor performance was due to lack of software support and windows hotfix support. If the hotfix has released, then Bulldozer performance should be better and it should marked as 4 Core 8 Threads. I look forward to here AMD release 2nd gen APU with Bulldozer inside.