РЕКЛАМА
ИНФОРМАЦИЯ
ПОЛЕЗНЫЕ ССЫЛКИ
The Mobility Radeon 7500 - NVIDIA and ATI Go Head to Head In The Mobile Market

Mobile CPU Mania

The First Palomino - AMD Releases Mobile Athlon 4

The Mobility Radeon 7500 - NVIDIA and ATI Go Head to Head In The Mobile Market

ATi Releases Mobility RADEON

Nuts and Bolts of Notebooks

Welcome to CADENCE

Rambler's Top100 Рейтинг@Mail.ru

НОУТБУКИ И КПК

IBM ThinkPad A31p -<BR>An Exclusive First Look
Краткое содержание статьи: It's a workstation replacement powered by the P4 Mobile 1.7 GHz, and a Radeon Mobility 7800 FireGL graphics subsystem. We got our hands on one of the very first review systems from IBM to bring you this report.

IBM ThinkPad A31p -<BR>An Exclusive First Look


Редакция THG,  6 марта 2002
Назад
Вы читаете страницу 4 из 16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Далее


Mobile Pentium 4 Is Now Here


Mobile Pentium 4 Is Now Here

It took Intel a mere 15 months until Pentium 4 was finally fit for mobile devices. The first Pentium 4 core, going by the code name of 'Willamette,' was unable to meet the power and thermal requirements of a mobile environment. The 0.18 micron Willamette core was big, power hungry and hot. The door into the mobile world was finally pushed open for Pentium 4 when Intel had finished the 0.13 micron 'Northwood' core, as found in all desktop Pentium 4 models with the 'A' at the end. Northwood is much smaller, needs a lot less power and doesn't get nearly as hot as its older brother Willamette. In the interim, the Pentium IIIm 'Tualatin' at 1 - 1.2 GHz filled the void. In fact, many of the strides made in the Pentium IIIm are evident in the design of the Pentium 4m.

From a processor architecture point of view, Pentium 4m is identical to the new desktop Pentium 4 A processors. It comes with the same features and the same 512 Kbytes of second level cache. However, due to its nature as a mobile processor, Pentium 4m comes with a boatload of power-saving features that cannot be found on desktop Pentium 4 CPUs. You'll also find that Pentium 4m has, with its 479 pins, one pin more than its desktop brother. The power-saving features of Pentium 4m are already known from the latest Pentium IIIm processors. A 'Deeper Sleep Alert State' allows the CPU to run with very little power, while still able to 'wake up' extremely quickly. The 'Enhanced SpeedStep' technology allows throttling according to software performance requirements, rather than just according to the power source.

The Pentium 4m and the Pentium IIIm are both built on a 0.13 micron process technology. The Pentium 4m features an average power rating of less than 2 W when running in 'Battery Mode' at 1.2 V, throttled down to 1.2 GHz. Pentium IIIm required an average power rating of 1.5 watts in the same mode when running throttled down to 800 MHz at 1.15 V. At full speed, Pentium 4m requires 1.3 V, while Pentium IIIm requires 1.4 V for full speed operation. As nice as those 1.5 or 2 W of average power rating in battery mode may sound, little should we forget that those mobile processors burn a lot more power in full speed mode, either when the notebook is connected to an AC-power source or in case the user manually switched to full speed mode in battery operation. In this case, Pentium 4m has a 'TDP' (Thermal Design Power) of 30 W, and Pentium 3m at 1.2 GHz is specified with a TDP of 22 W. The TDP is the amount of thermal power that needs to be removed in a real world software worst-case scenario. The notebook designers have to ensure that their new Pentium 4 notebooks have a thermal design that allows the removal of up to 30 W of heat.

Mobile Pentium 4 Is Now Here

Of course, Intel also introduced a new chipset for Pentium 4m, the i845MP. As you can guess by its name, this chipset is obviously based on the i845 chipset known from desktop systems. The i845MP runs with either up to 1 GB SDRAM or DDR-SDRAM memory, and consists of the MCH-M north bridge and the already known ICH3-M south bridge that can also be found in Pentium 3 notebooks with 830 chipset.

Don't get too excited about Pentium 4m's power requirements. The major "power drainer" of today's notebooks is not the processor anymore. Especially power hungry is the display, but other components do their part, as well; for example, hard drives have a larger impact on overall power usage. Therefore, Pentium 4 notebooks should run neither significantly shorter nor longer than modern high-end Pentium III notebooks.
Назад
Вы читаете страницу 4 из 16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Далее


СОДЕРЖАНИЕ

Обсуждение в Клубе Экспертов THG Обсуждение в Клубе Экспертов THG


РЕКЛАМА
РЕКОМЕНДУЕМ ПРОЧЕСТЬ!

История мейнфреймов: от Harvard Mark I до System z10 EC
Верите вы или нет, но были времена, когда компьютеры занимали целые комнаты. Сегодня вы работаете за небольшим персональным компьютером, но когда-то о таком можно было только мечтать. Предлагаем окунуться в историю и познакомиться с самыми знаковыми мейнфреймами за последние десятилетия.

Пятнадцать процессоров Intel x86, вошедших в историю
Компания Intel выпустила за годы существования немало процессоров x86, начиная с эпохи расцвета ПК, но не все из них оставили незабываемый след в истории. В нашей первой статье цикла мы рассмотрим пятнадцать наиболее любопытных и памятных процессоров Intel, от 8086 до Core 2 Duo.

ССЫЛКИ
Реклама от YouDo
Объявление: https://youdo.com/lp-remont-elektrorozgiga-gazovoy-pliti/ - рекомендуем!
Подключение посудомоечной машины к водопроводу на https://youdo.com/lp-podklyuchenie-posudomoechnoy-mashini-k-vodoprovodu/.
Услуги курьера: http://courier.youdo.com/products-delivery/geo/pushkino/ - ссылка на описание.