Overclockers - beware of voltages in excess of Intel recommended max on Penryn (45nm) processors !!
 

See the following sad story:-

http://www.anandtech.com/weblog/showpost.aspx?i=428

Even if you use voltages nowhere as extreme as the Anandtech
reviewers, you may still be contributing to a longer-term
early-failure. These hafnium-gate devices may be a lot less
accommodating of overstress than previous gate technology. It would be
very wise to respect Intel's recommended voltage maximums and let
other 'guinea-pigs' ( or those with lots of spare cash) fill in the
MTBF vs voltage profiles of 45nm processors..

John Lewis

Overclockers - beware of voltages in excess of Intel recommended max on Penryn (45nm) processors !!
 

On Sun, 27 Apr 2008 20:14:31 GMT, (John Lewis)
wrote:

See the following sad story:-

http://www.anandtech.com/weblog/showpost.aspx?i=428

Even if you use voltages nowhere as extreme as the Anandtech
reviewers, you may still be contributing to a longer-term
early-failure. These hafnium-gate devices may be a lot less
accommodating of overstress than previous gate technology. It would be
very wise to respect Intel's recommended voltage maximums and let
other 'guinea-pigs' ( or those with lots of spare cash) fill in the
MTBF vs voltage profiles of 45nm processors..

John Lewis

Early failure is pretty much always a risk with overclocking, even
when specific cases are not published. That's the primary reason I
don't do it.

Overclockers - beware of voltages in excess of Intel recommended max on Penryn (45nm) processors !!
 

"John Lewis" wrote in message
...
See the following sad story:-

http://www.anandtech.com/weblog/showpost.aspx?i=428

Even if you use voltages nowhere as extreme as the Anandtech
reviewers, you may still be contributing to a longer-term
early-failure. These hafnium-gate devices may be a lot less
accommodating of overstress than previous gate technology. It would be
very wise to respect Intel's recommended voltage maximums and let
other 'guinea-pigs' ( or those with lots of spare cash) fill in the
MTBF vs voltage profiles of 45nm processors..

John Lewis

And this was X-posted to the Nvidia and ATI videocard group for what reason?
Because PC's have vieocards in them?

Overclockers - beware of voltages in excess of Intel recommended max on Penryn (45nm) processors !!
 

On Sun, 27 Apr 2008 20:14:31 GMT, (John Lewis)
wrote:

See the following sad story:-

http://www.anandtech.com/weblog/showpost.aspx?i=428

Even if you use voltages nowhere as extreme as the Anandtech
reviewers, you may still be contributing to a longer-term
early-failure. These hafnium-gate devices may be a lot less
accommodating of overstress than previous gate technology. It would be
very wise to respect Intel's recommended voltage maximums and let
other 'guinea-pigs' ( or those with lots of spare cash) fill in the
MTBF vs voltage profiles of 45nm processors..

John Lewis

As the geometry of silicon gets smaller, core or case temperature
becomes a far less reliable guide to the Mean Time before Failure.
Other mechanisms such as applied voltage begin to dominate.

John Lewis

Overclockers - beware of voltages in excess of Intel recommended max on Penryn (45nm) processors !!
 

'Augustus' wrote:
And this was X-posted to the Nvidia and ATI videocard group for what
reason? Because PC's have vieocards in them?
_____

Because the original poster didn't dare post in overclocking newsgroups
where the contents would be evaluated. For example why boost VTT in the
first place? After all, the stated CPU Clock rate is only 453 MHz, just a
53 MHz / 400 MHz = 13% boost above the stock clock for the Intel X48 1600
MHz specified FSB (plenty of Intel chipset motherboards NOT specified for
1600 MHz FSB operation will operate at that speed without VTT boosts.) And
the sample is quantity one for the original post. And the original post is
both unsigned AND in a forum. And the added comments by the original poster
for this thread have even less provenance.

Phil Weldon

"Augustus" wrote in message
news:ih6Rj.2697$XI1.845@edtnps91...

"John Lewis" wrote in message
...
See the following sad story:-

http://www.anandtech.com/weblog/showpost.aspx?i=428

Even if you use voltages nowhere as extreme as the Anandtech
reviewers, you may still be contributing to a longer-term
early-failure. These hafnium-gate devices may be a lot less
accommodating of overstress than previous gate technology. It would be
very wise to respect Intel's recommended voltage maximums and let
other 'guinea-pigs' ( or those with lots of spare cash) fill in the
MTBF vs voltage profiles of 45nm processors..

John Lewis

And this was X-posted to the Nvidia and ATI videocard group for what
reason? Because PC's have vieocards in them?

Overclockers - beware of voltages in excess of Intel recommended max on Penryn (45nm) processors !!
 

On Sun, 27 Apr 2008 18:43:32 -0400, "Phil Weldon"
wrote:

'Augustus' wrote:
And this was X-posted to the Nvidia and ATI videocard group for what
reason? Because PC's have vieocards in them?
_____

Because the original poster didn't dare post in overclocking newsgroups
where the contents would be evaluated. For example why boost VTT in the
first place? After all, the stated CPU Clock rate is only 453 MHz, just a
53 MHz / 400 MHz = 13% boost above the stock clock for the Intel X48 1600
MHz specified FSB (plenty of Intel chipset motherboards NOT specified for
1600 MHz FSB operation will operate at that speed without VTT boosts.) And
the sample is quantity one for the original post. And the original post is
both unsigned AND in a forum. And the added comments by the original poster
for this thread have even less provenance.

Phil Weldon


The misfortune happened at Anandtech in extreme stress testing..
Probably the most respected PC hardware review site in the world for
its technical authority. Er, Gary Key, the author of the article is
one of their top reviewers. And he posted the warning as a practical
instance of what can happen if you play with voltages in excess of
manufacturer rating, as many other have found out recently when
overvolting memory. Why not read the full blog and Gary's implied
intentions before jumping in with both feet.

Oh, btw. I do have quite a bit of stress/QC experience over quite a
few years with standard digital silicon processes. It takes quite some
time to fully establish the failure corners. Regardless of Intel's
best efforts, I suspect there is quite a bit of learning still be to
done even by Intel in that direction on hafnium-gate silicon.


"Augustus" wrote in message

And this was X-posted to the Nvidia and ATI videocard group for what
reason? Because PC's have vieocards in them?

Nope.

Because those that read those specific newsgroups are likely be more
than casual PC users and highly likely to be in the
build-it-and-tweak-it-yourself PC community. I thought it easier to
reach more PC tweakers that way than try posting to a myriad of
motherboard newsgroups besides Asus.

You do leap to the wrong conclusions rather fast, don't you? Been
very long in these newsgroups or are you just a passing newbie?

John Lewis

Overclockers - beware of voltages in excess of Intel recommended max on Penryn (45nm) processors !!
 

hmm...

I brought my complete PC recently Overclocked proccessor (quad 2.4 OC to
3.2) and OC Vid as advertised. Wonder how mine will fare over the 12 months
that is a legal requirement for warranty on goods sold in the UK. As a unit
I've been informed, this would take precedent over individual item warranty
requirements laid down by say, Intel or Nvidia. Also the selling company of
the PC has the liability over individual parts manufacture.

Interesting :)

Alan

Overclockers - beware of voltages in excess of Intel recommended max on Penryn (45nm) processors !!
 

You do leap to the wrong conclusions rather fast, don't you? Been
very long in these newsgroups or are you just a passing newbie?

John Lewis

Passing newbie?....lol....Who's the clown who's never heard of
alt.comp.hardware.overclocking?

Overclockers - beware of voltages in excess of Intel recommendedmax on Penryn (45nm) processors !!
 

John Lewis wrote:

The misfortune happened at Anandtech in extreme stress testing..
Probably the most respected PC hardware review site in the world for
its technical authority.

You are bonkers if that is what you think. More so if you are in any way
affiliated with that site or its advertisers.

Anandtech is perfectly average in every way.

Overclockers - beware of voltages in excess of Intel recommended max on Penryn (45nm) processors !!
 

On Sun, 27 Apr 2008 23:34:37 -0400, "Mr.E Solved!"
wrote:

John Lewis wrote:

The misfortune happened at Anandtech in extreme stress testing..
Probably the most respected PC hardware review site in the world for
its technical authority.

You are bonkers if that is what you think. More so if you are in any way
affiliated with that site or its advertisers.


Not at all. However, I do happen to be a hardware engineer
specializing in computer-based professional technical instrumentation,
so maybe I do have some ability to discern technical competence in
this field

Anandtech is perfectly average in every way.

Really ? And what makes you come to that conclusion ?

Perfectly average? Just like you ??

Your moniker betrays your pomposity. Try applying to
Anandtech as a reviewer some day. Or to Ars Technica as
a journalist.

John Lewis