РЕКЛАМА
ИНФОРМАЦИЯ
ПОЛЕЗНЫЕ ССЫЛКИ
Intel Goes DDR - Do We Really Care?

Behind The Silicon Curtain: Exclusive Test Of The P4/2666 With 533 MHz Rambus

Rambler's Top100 Рейтинг@Mail.ru

МАТПЛАТЫ

Intel
Краткое содержание статьи: Bending to industry pressure, Intel added DDR support for the 845 chipset - and the long desired alternative to RDRAM was born. Due to Intel's extensive experience in the chipset sector, most people will prefer the 845 chipset to other solutions, and its availability is also widespread. We put a total of 19 motherboards to the test in order to give you well-founded advice.

Intel's Strike Force:<BR>19 DDR-Motherboards With 845 Chipset and DDR-Support


Редакция THG,  18 марта 2002
Назад
Вы читаете страницу 7 из 36
Далее


Overclocking: If You Do It, Do It Right!

It doesn't take much effort to increase the FSB speed by a couple MHz, but real overclocking (10% or faster clock speed) requires that you be much more thorough.

The CPU clock consists of the system clock, the Front Side Bus (FSB), and the multiplier. Pentium 4 systems work at 100 MHz FSB (quad-pumped, resulting in a performance that corresponds to a 400 MHz bus) and with multipliers between 14 (1.4 GHz) and 22 (2.2 GHz). Unfortunately, the multipliers on the Pentium 4 CPUs have been locked for years, so they cannot be altered. The only way to increase the CPU clock is to increase one of the multiplication factors - in this case, only the FSB is left.

It doesn't matter how the clock is increased: higher clock speeds usually require a higher CPU core voltage in order to run stably. Many motherboards in this review support core voltages of up to 1.85 V. That is enough to run a modern Northwood CPU at 2.5 GHz or even more, depending on the quality of your CPU cooling method.

As soon as the FSB clock is increased, both the AGP and the PCI clock will be increased analog to the FSB. Be careful: although it's unlikely that a component could be damaged, there are certain limits for PCI- and AGP cards. Usually you should stay below 40 MHz for PCI cards and below 85 MHz for AGP hardware.

Some of the recent motherboards give you the option of defining the PCI and AGP speeds relative to the FSB. Abit's BD7-RAID was one of the first motherboards to allow the FSB to be raised to 133 MHz, while the PCI and AGP interfaces can be clocked to specifications of 33 and 66 MHz, respectively. Even the memory stays at safe 133 MHz.

Further options for overclocking consist of increasing the AGP and the memory voltages (some motherboards can go up to 2.8 V instead of 2.5 V).

Reasonable Clock Speeds

The following table consists of our recommendations on how to run overclocked Pentium 4 CPUs. These statements are meant to be guidelines only and do not claim to be absolute, so it's likely that you can achieve higher clock speeds, though sometimes maybe ony lower. Everything depends on the quality of the individual processor. The only thing that you should always take care of is not to exceed ~40 MHz PCI and ~85 MHz AGP.

Processor FSB PCI Clock CPU Clock
P4 - 1700 MHz 115 MHz 38.3 MHz 1955 MHz
P4 - 1800 MHz 112 MHz 37.3 MHz 2016 MHz
P4 - 1900 MHz 110 MHz 36.6 MHz 2090 MHz
P4 - 2000 MHz 107 MHz 35.6 MHz 2140 MHz
P4 - 2200 MHz 115 MHz 38.3 MHz 2530 MHz
Назад
Вы читаете страницу 7 из 36
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
Ремонт духовых шкафов в Санкт-Петербурге на https://youdo.com/.