作者firmware

很期待跟Bulldozer搭配的新的900-series IGP呀, 不知道有沒有更強大的core整合進去, 真希望哪天IGP的記憶體頻寬變成64bit啊

SB900南橋也順便來個USB3.0+SATA 6Gb/s的效能提升呀

作者浮出水面

雖然我買了很多AMD的產品，但我對AMD未來的發展並不樂觀

比方說這幾年來Intel一直致力於核心單元的激進改造

像微指令融合搭配多組簡單解碼器、LSD或追蹤式快取等...

再再都是為了大幅減少X86指令在重複解碼過程中所浪費的時間及電力

反觀AMD這邊幾乎只能對「非」核心單元進行大刀闊斧的動作

雖然Bulldozer架構可進一步改進多線程的效能

但單線程方面恐怕會越輸越遠

作者physx

我記得AMD說過雙模塊的bulldozer整數性能會比現在的四核心強10~35%

作者Bulldozer 20 Questions Part2

“How much extra performance will we see when running two-threaded applications on one Bulldozer Module compared to two cores in different modules?” – Simon

Without getting too specific around actual scaling across cores on the processor, let me share with you what was in the Hot Chips presentation. Compared to CMP (chip multiprocessing – which is, in simplistic terms building a multicore chip with each core having its own dedicated resources) two integer cores in a Bulldozer module would deliver roughly 80% of the throughput. But, because they have shared resources, they deliver that throughput at low power and low cost. Using CMP has some drawbacks, including more heat and more die space. The heat can limit performance in addition to consuming more power. Ask yourself, would you rather have a 4-cylinder engine that delivered 300HP or a 6-cylinder engine that delivered 360HP and consumed less gas? The cylinder to horsepower ratio for 4-cylinder is obviously higher (75HP/cylinder vs. the V6’s 60HP/cylinder), meaning that each cylinder can give you more performance. However, looking at the overall enginge, you are getting less total output; and you are getting that lower output at a higher cost (higher gas consumption).

作者浮出水面

反觀AMD這邊幾乎只能對「非」核心單元進行大刀闊斧的動作
雖然Bulldozer架構可進一步改進多線程的效能
但單線程方面恐怕會越輸越遠

作者orakim

基本上AMD是賭軟體發展+製程障礙(算是放棄單線程這塊),intel則是穩穩出牌

作者physx

一個模塊可以有雙核80%的性能，這樣看來整數效能贏i3不是問題，但對決i5實則困難

作者physx

說的有道理，AMD很明顯是要走跟intel不一樣的路

可能以後要用模塊來計算bulldozer的性能比較妥當

一個模塊可以有雙核80%的性能，這樣看來整數效能贏i3不是問題，但對決i5實則困難

不曉得同核心數的情況下bulldozer能不能比現在的phenom II有所提升

如果bulldozer雙模塊的表現跟現有的phenom II X4持平，那四模塊大概只能摸到intel六核的邊

另外我比較在意一個模塊的單線程性能會比現有的phenom II高多少

可能要等到AMD公佈bulldozer的時脈才會知道

四模塊bulldozer有L2 8MB+L3 8MB=16MB SRAM

一個模塊就有2MB的L2，跟現階段四核一樣多