Nehalem also has a TLB bug

[Ci7]

We were pointed out that Intel's Nehalem, the CPU that we know as Core i7 has TLB. TLB, three letters that have destroyed the sales of Phenom and Opterons based on 65nm K10 cores stands for Translation Lookaside Buffer and Intel officialy states in its Intel Core i7 Processor, Extreme Edition Series and Intel Core i7 Processor - Specification Update PDF that the CPU has a TLB bug.

If you open Intel?s official document that is nicely stored here, on page 37 AAJ1 Clarification of TRANSLATION LOOKASIDE BUFFERS (TLBS) Invalidation part, you will see that Intel tells that in some rare cases improper TLB invalidation may result in unpredictable system behaviour and can hang your OS or result with incorrect data. Here is the word to word "In rare instances, improper TLB invalidation may result in unpredictable system behavior, such as system hangs or incorrect data. Developers of operating systems should take this documentation into account when designing TLB invalidation algorithms. For the processors affected, Intel has provided a recommended update to system and BIOS vendors to incorporate into their BIOS to resolve this issue."

We are not sure if you should be concerned, but such a thing completely destroyed K10?s reputation and we will certainly do a bit more investigating about it, and ask Intel for a comment. We would like to thank one of our readers for the tip.

source

that sound sca:no::no:

[The_Decryptor Veteran]

Loads of processors have crippling bugs, my C2D has about 3 or 4 known "showstopper" bugs

They're worked around in software, as they always have been.

[TruckWEB]

Loads of processors have crippling bugs, my C2D has about 3 or 4 known "showstopper" bugs

They're worked around in software, as they always have been.

Somehow, the TLB bugs seems to be worst than some others. Just look at the performance hit that AMD had with their Phenom with the TLB problem....

That's a HUGE Oupss from Intel, since they could have learned from AMD.....

[Unknown_97784568745]

Here's the page of the desktop Core 2 Duo E7000 and E8000 series: http://download.intel.com/design/processor...updt/318733.pdf

It has the exact same text written on page 47.

Here's the page of the desktop Core 2 Duo X6800, E6000 and E4000 series: http://download.intel.com/design/processor...updt/313279.pdf

It has the exact same text written on page 71.

Here's the page of the desktop Pentium Dual Core E2000 series: http://download.intel.com/design/processor...updt/316982.pdf

It has the exact same text written on page 59.

Here's the page of the Intel Celeron 200 series: http://download.intel.com/design/processor...dt/31854702.pdf

It has the exact same text written on page 53.

Should I continue? :p

[Ci7]

Here's the page of the desktop Core 2 Duo E7000 and E8000 series: http://download.intel.com/design/processor...updt/318733.pdf

It has the exact same text written on page 47.

Here's the page of the desktop Core 2 Duo X6800, E6000 and E4000 series: http://download.intel.com/design/processor...updt/313279.pdf

It has the exact same text written on page 71.

Here's the page of the desktop Pentium Dual Core E2000 series: http://download.intel.com/design/processor...updt/316982.pdf

It has the exact same text written on page 59.

Here's the page of the Intel Celeron 200 series: http://download.intel.com/design/processor...dt/31854702.pdf

It has the exact same text written on page 53.

Should I continue? :p

mm Q6600 isnt in here i am safe then :p

/jking i know , i know same deal as E66xx lol

[afusion]

That's just sad :(

I know allot of people who dumped over 2 grand on their Core i7 machines. To be honest I sort of predicted this would happen which is one of the reasons besides the high priced memory, and architecture.

My new build is for a Phenom II. It may not be the fastest but it can get me places

[Unknown_97784568745]

It seems it does have a TLB bug.

Edited December 1, 2008 by bb10

[NienorGT]

All CPU may have bugs...

TLB was just a widely known one, like the Intel's F00F and FDIV back in the days :ermm:

[afusion]

All CPU may have bugs...

TLB was just a widely known one, like the Intel's F00F and FDIV back in the days :ermm:

Was this during the Pentium III era?

[stevember]

But when AMD had same it was blown out proportion, to the extent that they had to be seen to fix.

AMD's bug was similar in chances of effecting a system.

Lets hope press blow this up and lowers price Intels chips that has increased recently due numerous issues.

[Jason S. Global Moderator]

this really shouldnt be much of a concern for people... cpu's always have bugs.

[afusion]

this really shouldnt be much of a concern for people... cpu's always have bugs.

Depends which kinds though.

[NienorGT]

Was this during the Pentium III era?

No, Pentium First of the name.

Actually, my father brought an 486 computer even after the release of the Pentium one year before.

He said that back in the days, the Pentium wasn't recommendable :huh:

http://en.wikipedia.org/wiki/F00f

http://en.wikipedia.org/wiki/Pentium_FDIV_bug

[nmesisca]

Was this during the Pentium III era?

No this was affecting Pentium 60 (and I think 75) , the first series of Pentiums.

Intel was smart at that time, and used the faulty chips to make key rings, ear rings, bracelets etc..

I still have a Keyring incorporating a Pentium 60 core. :)

[afusion]

No this was affecting Pentium 60 (and I think 75) , the first series of Pentiums.

Intel was smart at that time, and used the faulty chips to make key rings, ear rings, bracelets etc..

I still have a Keyring incorporating a Pentium 60 core. :)

They did this with the Pentium 4 "Willamette" if I'm not mistaken.

[nmesisca]

They did this with the Pentium 4 "Willamette" if I'm not mistaken.

I dont know.. they may have done it with that too, but the FDIV was the P60 bug, and that was some.. 18 years ago.. more or less..

:s

probably more :s crap I am old..

[capr]

haha if all those processors mentioned in a previous response have thsi problem then we really need to live with it and not announce it as a bug... just say it's a "feature" to keep the software designers awake.

[stevember]

I dont know.. they may have done it with that too, but the FDIV was the P60 bug, and that was some.. 18 years ago.. more or less..

:s

probably more :s crap I am old..

I was about to say nah way out it was 98 or so, lol.

But 1993 dam time flies. I spent fortune going from 60 to a 90.

[nmesisca]

I was about to say nah way out it was 98 or so, lol.

But 1993 dam time flies. I spent fortune going from 60 to a 90.

I wish it was 1998..

I had a 486 DX4-100 at the time, with a Promise IDE controller with 256KB cache on board and two (!!) 40GB hard drives.

Im depressed now.

[stevember]

lol yeah

putting Spectrum etc aside.

My first PC was 386 8Mhz with button made it 16Mhz I didn't ever put on 16Mhz as didn't know what it was.

I spent ?145.00 ($250.00 usd) on upgrading to 2 mb ram so could play Links 386 it took 20-40 seconds redraw screen.