It appears you have not yet registered with our community. To register please click here...

Go Back [M] > Madshrimps > WebNews
Nehalem: The Unwritten Chapters Nehalem: The Unwritten Chapters
FAQ Members List Calendar Search Today's Posts Mark Forums Read

Nehalem: The Unwritten Chapters
Thread Tools
Old 7th November 2008, 17:43   #1
jmke's Avatar
Join Date: May 2002
Location: 7090/Belgium
Posts: 79,021
jmke has disabled reputation
Default Nehalem: The Unwritten Chapters

This one is a complete non-issue, but it's worth explaining. Intel's Turbo mode allows the Core i7 to ratchet up its clock speed by 133MHz or 266MHz depending on how many cores are active and if the CPU is cool enough. Every Core i7 is guaranteed to be able to work at up to 133MHz faster than its native clock speed if more than one core is active and the chip is cool enough, and 266MHz if only a single core is active and once again, the chip is cool enough.

It turns out that Turbo mode is governed by more than just temperature however, both current draw and TDP are monitored to make sure that the CPU isn't exceeding its designed specifications when running in Turbo mode. If either value is exceeded then the chip will automatically reduce its clock multiplier back to its stock setting to avoid damaging the CPU. It's sort of like the overheating protection that Intel has had on its CPUs since the Pentium 4 days; if the chip gets too hot, it underclocks itself until it's cool again.

The concern was that because of these TDP and current draw limitations, you would not be able to take lower end Core i7 processors and overclock them. The $999 Core i7-965 Extreme Edition doesn't have this problem as you can manually configure both the max TDP and current draw values, just like you can adjust its clock multiplier.
jmke is offline   Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
Intel Nehalem EP in the house jmke WebNews 2 10th March 2009 18:11
Intel Plans 10W Nehalem CPU jmke WebNews 0 5th February 2009 16:17
Nehalem and memory overclocking jmke WebNews 6 12th September 2008 07:56
Inside the Nehalem: Intel's New Core i7 Microarchitecture jmke WebNews 0 26th August 2008 17:23
Nehalem - Everything You Need to Know about Intel's New Architecture jmke WebNews 0 21st August 2008 20:21
Power gating and turbo mode: Intel talks Nehalem at IDF jmke WebNews 0 20th August 2008 15:04
Latest version of Core Temp adds Nehalem Support jmke WebNews 0 19th August 2008 12:51
Intel Nehalem 3rd Party Heatsink Pictured jmke WebNews 0 18th August 2008 10:45
Cat's out of the Bag: Intel Nehalem Benchmarked jmke WebNews 1 5th June 2008 20:37
Opening the Kimono: Intel Details Nehalem and Tempts with Larrabee jmke WebNews 0 18th March 2008 16:14

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT +1. The time now is 18:21.

Powered by vBulletin® - Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO