2008年11月17日 星期一

Core i7

英特爾推出了代碼為Nehalem的微處理器系列產品中的第一款產品。該系列產品備受期待﹐正式名稱為英特爾Core i7。在推出該產品時﹐矽谷預計正將出現自2000年互聯網泡沫破裂以來最嚴重的衰退。英特爾上週把第四季度收入預期下調超過10億美元﹐顯示出業務在 10月中旬以來大幅下滑。與此同時﹐其他科技公司紛紛宣佈裁員。

儘管有跡象顯示客戶正在推遲購買電腦﹐而硬件製造商也在努力控制零部件庫存﹐但英特爾及其客戶並沒有放緩使用新晶片的計劃。原因之一就在於﹐科技公司通過過去低迷時期的經驗瞭解到﹐放緩創新的速度可能推遲復甦的時間。

Don Clark
Wwikipedia 還有粵語版

Core i7(中文:酷睿 i7)處理器是英特爾於2008年推出的64位元四核心CPU,沿用x86-64指令集,並以Intel Nehalem微架構為基礎[1],取代Intel Core 2系列處理器。Nehalem曾經是Pentium 4 10 GHz版本的代號[2]。Core i7的名稱並沒有特別的含義,Intel表示取i7此名的原因只是聽起來悅耳,'i'和'7'都沒有特別的意思,更不是指第7代產品。而Core就是延續上一代Core處理器的成功[3]。官方的正式推出日期是2008年11月17日。早在11月3日,官方己公佈相關產品的售價,網上評測亦陸續被解封。

Core i7處理器系列將不會再使用Duo或者Quad等字樣來辨別核心數量。最高階的Core i7處理器配合的晶片組是Intel X58。Core i7處理器的目標是提升高性能計算和虛擬化性能。所以在電腦遊戲方面,它的效能提升幅度有限[4]。另外,在64-bit模式下可以啟動宏融合模式,上一代的Core處理器只支援32-bit模式。該技術可合併某些X86指令成單一指令,加快計算周期。


特點

  • 支援Simulate Multi Threading(SMT)技術,一個類似超線程的技術,令到四核心的處理器,有總共8個線程。
  • 記憶體控制器會內建於CPU中,支援三通道DDR-III記億體[5]。
  • 支援Turbo Mode(後更名為Dymanic Speed[6])技術,倘若有程式使用較多的處理器負載,處理器的頻率可以按步驟提升,此外,可以自動往上提升倍頻。[7]該功能不需要作業系統的支援,完全由硬體監控[8]。
  • 支援Power Gates技術,核心閒置的時候可被關閉。對比上一代的Core 2 Duo,Core i7的核心電阻可以被關閉,電流可以完全不通過核心。各個處理器核心可運作於不同的頻率和電壓[9]。
  • Turbo Mode及Power Gates功能都是由一個單元提供,佔去大約一百萬個電晶體[10]。
  • 放棄了傳統的FSB,使用了新的'Quick Path Interconnect',與AMD的HyperTransport相似。相比FSB,每一個處理器都可以有獨立的QPI通道與其他處理器連接,處理器之間不用再共享FSB頻寬,並繞路到北橋才能通訊。此外,QPI是雙向傳輸[11]。
  • 指令集方面,SSE4的版本會提升為SSE 4.2,後者新增了7條指令。[12]
  • 處理器採用模組化設計[13]。例如核心、記憶體控制器、以至輸入輸出介面控制器,都能夠以不同的數量配搭。這樣做可以使到產品更容易針對不同市場,而每一個模組都可以有獨立的電壓,令到處理器更省電。
  • L2緩存亦有所減少,每一個核心獨立256KB,但擁有較低讀取延遲值。加入L3緩存,每一個處理器共享8MB。
  • 處理器核心的電壓與系統記憶體同步。目前,官方會支持DDR3-800和DDR3-1066規格。對於DDR3-1333,由於處理器只可以接受較低的電壓水平(限制在1.65V或以下),高速的記憶體意味著需要較高的電壓,所以此規格的官方支援仍然存在疑問[14]。第二批X58晶片組主機版將可以實現電壓異步,方便用家超頻[15]。另外,原先只有XE版本處理器可以調整記憶體頻率。後Intel修改為所有上市的Core i7處理器,均可以修改記憶體和QPI的頻率。[16]

[編輯] 處理器列表

型號 代號 市場區隔 製程 核心 (線程數) 速度 價格 (美元) 快取 記憶體控制器 匯流排介面 TDP 插槽 出品日期
965 Bloomfield 桌上型(極緻) 45奈米 4 (8) 3.2 GHz $999[17] 256 KB L2/core
L3共用8MB
三通道DDR3
800/1066 MHz[18]
1x 6.4 GT/s QuickPath 130W LGA1366 2008年10月[19]
940 桌上型(效能) 2.93 GHz $562 1x 4.8 GT/s QuickPath
920 桌上型(主流) 2.66 GHz $284

[編輯] 晶片組

X5 系列:

  • Intel X58 - 不再整合系統記憶體控制器,所以北橋改稱為IOH。提供最多3根PCI-E 2.0 x16插槽,支援CrossFire技術。主機板廠商在取得NVIDIA授權後,可令其主板支援SLI技術。使用ICH10系列南橋晶片。

[編輯] 參考技術解析文章

史上最強Intel Nehalem架構超詳解析

[編輯] 參考資料



Microsoft's 'Vista Capable' changes outraged HP

Microsoft's 'Vista Capable' changes outraged HP, insider e-mails show

By helping Intel, Microsoft 'severely damaged' its credibility with HP, exec said

By Gregg Keizer

November 16, 2008 (Computerworld) A Hewlett-Packard Co. executive was furious at Microsoft Corp. over the company's decision to loosen the requirements for its "Vista Capable" marketing campaign, internal e-mails unsealed by a federal judge on Friday show.

"I hope this incident isn't a foretaste of the relationship I will have with Microsoft going forward, but I can tell you that it's left a very bad taste with me and my team," Richard Walker, senior vice president at HP's consumer PC unit, said in a Feb. 1, 2006, message to senior Microsoft executives.

One of those executives, Jim Allchin, who was in overall charge of Vista's development and delivery, was almost as outraged. Allchin told his boss, CEO Steve Ballmer, that he was "beyond being upset" by the move. Ballmer denied being party to the decision.

The e-mails were unsealed by U.S. District Court Judge Marsha Pechman in the class-action lawsuit that accuses Microsoft of deceiving customers in 2006 by certifying PCs as able to run Vista when it allegedly knew the machines were able only to handle the stripped-down Vista Basic, a version that lacked the new, heavily-promoted Aero interface, and other touted features. Vista was released early in 2007.

In early 2006, Microsoft relaxed the Vista Capable rules by allowing computers equipped with Intel's older 915 graphics chip set to qualify for the program. Will Poole, then responsible for the client version of Windows, tossed out the requirement that a PC's graphics use the Windows Device Driver Model (WDDM), Vista's revamped driver architecture that debuted in Vista.

The decision pleased Intel Corp., which had complained that it didn't have a sufficient supply of the more advanced graphics chip sets that would have met the original requirements. In fact, Intel CEO Paul Otellini sent a note to Microsoft's Ballmer thanking him for the change.

HP, however, was anything but happy.

"The decision you have made has taken away an investment we made consciously for competitive advantage knowing that some players would choose not to make the same level of investment as we did in supporting your program requirements," said Walker in the Feb. 1, 2006 e-mail, which he sent to Kevin Johnson, Microsoft's chief operating officer, and Allchin.

HP, unlike other computer makers preparing for Vista, had decided to ditch the low-end Intel 915 and 910 graphics chip sets to make sure that its low-priced PCs would be able to run Vista. In another e-mail cited in the same group of messages unsealed Friday, Walked said HP had designed and built two new motherboards for its upcoming Vista Capable lines.

According to the separate plaintiffs' motion filed last Thursday -- which included numerous citations of internal e-mails but did not always quote them in their entirety or attribute them to an individual -- HP spent nearly $7 million on the technology to make its machines meet the original Vista Capable requirements.


"Now we have a situation where PC manufacturers (and processor/chip set suppliers) can claim Vista Capable in a 'good' mode just because it will run," Walker continued. "What kind of consumer assurance is that? Hardly one that puts any credence behind your desire to create the 'best possible customer experience for the Windows Vista Upgrade.'"

Walker went on to tell Johnson and Allchin that Microsoft's credibility at his HP group had been "severely damaged" because Microsoft had "change[d] the rules at the last minute" without notifying HP.

Allchin fired off a blistering e-mail to his boss, Steve Ballmer, within 10 minutes of Walker sending his message. "I am beyond being upset here. This was totally mismanaged by Intel and Microsoft. What a mess. Now we have an upset partner, Microsoft destroyed credibility, as well as my own credibility shot," he wrote to Ballmer.

"I was told this all started with a call between you and Paul [Otellini, Intel CEO]. I will have to get to the bottom of this and understand how we could be so insensitive to handling the situation."

In other messages, Allchin had called the decision to allow computers powered by Intel's 915 chip set to qualify for the Vista Capable program as "misleading customers." Allchin, who worked 17 years for Microsoft, retired the day Vista was released in late January 2007.

Ballmer denied having any part in the decision to loosen the rules for Vista Capable by ditching the WDDM requirement and instead put the responsibility on Poole's shoulders. "I had nothing to do with this," Ballmer said in a reply to Allchin later in the day on Feb. 1, 2006. "Will [Poole] handled everything. I received a message that Paul was goignt o [sic] call. Will said he would handle it. Paul called. I had not even had a chance to report his issues when Will told me he had solved them. (It did not sound like he had.) I am not even in the details of the issues," Ballmer said.

"You better get Will under control," Ballmer concluded.

Although the plaintiffs have asked to depose Ballmer, Microsoft has tried to block the demand. In a filing last month, Ballmer said he had no "unique knowledge of, nor did I have any unique involvement in any decisions regarding the Windows Vista Capable program."

Poole, a 12-year veteran of Microsoft, was assigned in mid-2007 to head a group devoted to emerging markets, but left the company this past September. He is now the co-chairman of NComputing Inc., a Redwood City, Calif.-based company that makes hardware and software that lets multiple users share a single PC.

According to analysts, the departure of several Microsoft executives responsible for Vista after its lackluster start came as no surprise.

HP was not finished telling off Microsoft, however. In another message -- also included in the Thursday motion -- an unidentified HP executive blasted Microsoft some more.

"It's not very often you get pulled out a meeting by a group of engineers who feel that they have had the rug pulled out from underneath them so that any competitive advantage we may have had in the marketplace is taken away, enabling any Tom, Dick or Harry with a PC containing a noncompliant processor/chip set to play at the same table," the e-mail read. "It begs the question when is a PC really Vista-capable."

It is possible that the author of the e-mail included in the Thursday motion was also written by Walker, since it references a previous message to Johnson and Allchin. "As I said in my note to Jim [Allchin] and Kevin [Johnson], it appears you have bowed to pressure from a partner who would have been embarrassed in the April time frame because their lineup was not completely compliant," the message said. Microsoft and its reseller partners launched the Vista Capable program in April 2006.

Last week was the second time that a number of insider e-mails have been made public during the case. Last February, Pechman unsealed several hundred messages that, among other things, described the problems that some top Microsoft officials had with Vista shortly after it was released and, as in the newest disclosures, revealed serious disagreements by some over the program.

The lawsuit, which began nearly a year and a half ago, was granted class-action status last February. It is currently set to go to trial in April.