Feeds

Intel 'Nocona' Xeon to get 'no execute' support

Core update due late September

  • alert
  • submit to reddit

3 Big data security analytics techniques

Intel will ship Xeon processors capable of supporting Windows XP Service Pack 2 Data Execution Prevention (DEP) security feature from 24 September, company documents seen by The Register reveal.

On Monday, Intel will begin shipping its 90nm 'Nocona' Xeon DP chip. Derived from the 'Prescott' Pentium 4, Nocona will support an 800MHz frontside bus speed and be made available in clock frequencies from 2.8GHz to 3.6GHz. The chips contain 1MB of L2 cache. They also support Intel's AMD64-like 64-bit x86 instruction set extensions, EM64.

Monday's parts will be based on the chip's D-0 core. But just as Intel is upgrading the D-0 P4 core to version E-0, so too will the new Xeon get a similar upgrade.

But while E-0 P4s are scheduled to arrive early October, the E-0 Xeons will ship a few weeks ahead of them, in late September.

According to the Intel documentation, the Xeon E-0 stepping provides support for the "execution disable bit", which is the hardware foundation upon which WinXP SP2's DEP is built. Essentially, it prevents executable code running when it's located in a page of memory earmarked for data. AMD's CPUs have had the feature for some time - AMD calls it 'No-execute Page Protection', or NX for short - and Transmeta is building it into the 90nm version of its Efficeon x86-compatible CPU.

The P4 is expected to gain DEP support in Q4 2004, but at this stage, it's not clear whether the feature will come from the E-0 stepping. Intel's P4 documentation doesn't say so, but the technology's incorporation into the 90nm Xeon suggests it could well be.

However, the anticipated timing of a P4 with the "execution disable bit" provision coincided with the original timeframe for the 4GHz P4. That part has been put back to Q1 2005, Intel has admitted, which could also push back DEP support.

The Xeon E-0 stepping will also "incorporate planned power optimisations to enable speed enhancements", including Thermal Monitor 2 and an enhanced processor halt state. ®

Related stories

Intel to add NX security to Pentium 4 in Q4
Intel to update 90nm Mobile P4 core
Intel preps P4 core update
64-bit WinXP set-back forced Intel to delay 4GHz P4?
Intel feels more 'complete' with release of 64-bit Xeon
Intel unveils 64-bit capable Xeon

SANS - Survey on application security programs

More from The Register

next story
This time it's 'Personal': new Office 365 sub covers just two devices
Redmond also brings Office into Google's back yard
Kingston DataTraveler MicroDuo: Turn your phone into a 72GB beast
USB-usiness in the front, micro-USB party in the back
Dropbox defends fantastically badly timed Condoleezza Rice appointment
'Nothing is going to change with Dr. Rice's appointment,' file sharer promises
BOFH: Oh DO tell us what you think. *CLICK*
$%%&amp Oh dear, we've been cut *CLICK* Well hello *CLICK* You're breaking up...
Bored with trading oil and gold? Why not flog some CLOUD servers?
Chicago Mercantile Exchange plans cloud spot exchange
Just what could be inside Dropbox's new 'Home For Life'?
Biz apps, messaging, photos, email, more storage – sorry, did you think there would be cake?
IT bods: How long does it take YOU to train up on new tech?
I'll leave my arrays to do the hard work, if you don't mind
prev story

Whitepapers

Designing a defence for mobile apps
In this whitepaper learn the various considerations for defending mobile applications; from the mobile application architecture itself to the myriad testing technologies needed to properly assess mobile applications risk.
3 Big data security analytics techniques
Applying these Big Data security analytics techniques can help you make your business safer by detecting attacks early, before significant damage is done.
Five 3D headsets to be won!
We were so impressed by the Durovis Dive headset we’ve asked the company to give some away to Reg readers.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
Securing web applications made simple and scalable
In this whitepaper learn how automated security testing can provide a simple and scalable way to protect your web applications.