Feeds

Intel 'Lynnfield'

Next-gen Core i7 - and Core i5

  • alert
  • submit to reddit

Secure remote control for conventional and virtual desktops

Intel has enhanced the Turbo Boost feature for Lynnfield and this is worth a closer look. Turbo Boost is a dynamic overclocking tool that increases the clock speed when the CPU is under load, so long as it continues to operate inside its thermal limits.

Intel Core i7 870

The i7 900 made limited use of Turbo Boost and only raised the CPU clock speed by one step of the 133MHz base clock for all four cores, or two steps if the software was thrashing one or two cores. In other words, a 2.66GHz Core i7 920 would accelerate to 2.8GHz on all four cores or 2.93GHz on one or two cores. This is a welcome increase, but the vast majority of enthusiasts who lay out the cash for Core i7 900 will surely want to overclock way beyond that point.

Lynnfield increases the impact of Turbo Boost by bumping the clock speed of all four cores of a 95W TDP CPU by two steps (266MHz) when the CPU is under load. If the software you are using only takes advantage of two processor cores then Turbo Boost can increase the clock speed by another two steps: 533MHz above the standard speed. If you are only using a single core, Turbo Boost will raise the speed by a total of five steps, or 666MHz. This means that Intel will dynamically overclock our 2.93GHz Core i7 870 to 3.2GHz on all four cores, 3.46GHz on two cores, or 3.6GHz on one core.

The low-power 82W TDP Lynnfield CPUs have another trick up their silicon sleeves. Turbo Boost will raise the clock speed of all four cores by a single step, but two cores can run a further five steps faster, and one core can go another step faster for a total of seven steps, or 933MHz.

It's anticipated that there will be five initial models of Lynnfield:

  • Core i7 870 2.93GHz (3.6GHz), 95W TDP
  • Core i7 860 2.8GHz (3.46GHz), 95W TDP
  • Core i5 750 2.66GHz (3.2GHz), 95W TDP
  • Core i7 860 2.53GHz (3.46GHz), 82W TDP
  • Core i5 750 2.4GHz (3.2GHz), 82W TDP

We were sent a Core i7 870 sample with a clock speed of 2.93GHz and a stock Intel CPU cooler. The Core i7 900 has a hefty maximum TDP of 130W that covers the whole family from Core i7 920 to 975 Extreme, while the first Lynnfield CPUs will have a TDP of 95W. This is a welcome step but Intel annoyingly set the LGA1156 cooler mounts are just a couple of millimetres closer together than the ones on the LGA1366 socket.

The essential guide to IT transformation

More from The Register

next story
Apple's iWatch? They cannae do it ... they don't have the POWER
Analyst predicts fanbois will have to wait until next year
The agony and ecstasy of SteamOS: WHERE ARE MY GAMES?
And yes it does need a fat HDD (or SSD, it's cool with either)
Barnes & Noble: Swallow a Samsung Nook tablet, please ... pretty please
Novelslab finally on sale with ($199 - $20) price tag
Kate Bush: Don't make me HAVE CONTACT with your iPHONE
Can't face sea of wobbling fondle implements. What happened to lighters, eh?
Apple to build WORLD'S BIGGEST iStore in Dubai
It's not the size of your shiny-shiny...
Just in case? Unverified 'supersize me' iPhone 6 pics in sneak leak peek
Is bigger necessarily better for the fruity firm's flagship phone?
Steve Jobs had BETTER BALLS than Atari, says Apple mouse designer
Xerox? Pff, not even in the same league as His Jobsiness
Apple analyst: fruity firm set to shift 75 million iPhones
We'll have some of whatever he's having please
prev story

Whitepapers

Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
7 Elements of Radically Simple OS Migration
Avoid the typical headaches of OS migration during your next project by learning about 7 elements of radically simple OS migration.
BYOD's dark side: Data protection
An endpoint data protection solution that adds value to the user and the organization so it can protect itself from data loss as well as leverage corporate data.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?