xz3rorom3o

Please read this SLOWLY:

"Absolute Maximum and Minimum Ratings
Table 3 specifies absolute maximum and minimum ratings only and lie outside the
functional limits of the processor. Within functional operation limits, functionality and
long-term reliability can be expected.
At conditions outside functional operation condition limits, but within absolute
maximum and minimum ratings, neither functionality nor long-term reliability can be
expected. If a device is returned to conditions within functional operation limits after
having been subjected to conditions outside these limits, but within the absolute
maximum and minimum ratings, the device may be functional, but with its lifetime
degraded depending on exposure to conditions exceeding the functional operation
condition limits.
At conditions exceeding absolute maximum and minimum ratings, neither functionality
nor long-term reliability can be expected. Moreover, if a device is subjected to these
conditions for any length of time then, when returned to conditions within the
functional operating condition limits, it will either not function, or its reliability will be
severely degraded."

Table 3, referring to 1.45V on the core being the Absolute Maximum voltage and lying OUTSIDE the functional limits of the processor.

The source doesn't say that anything a bit below 1.45V DOES NOT compromising the long-term functionality, esp since 1.3625V is the highest VID:

"At conditions outside functional operation condition limits, but within absolute
maximum and minimum ratings, neither functionality nor long-term reliability can be
expected."


Doesn't that refer to 1.3625-1.45V being the range between outside functional operation conditions and absolute max? In other words, isn't that saying anything above 1.3625V is outside functional operation, which is what we should not exceed if we want guaranteed long term functionality?

1.45V is the ABSOLUTE MAX and already long outside the functional operation voltage.

Extremely informative/important IMO.

from Intel E8000 Datasheet Jan. 2008: ftp://download.intel.com/design/proc...s/31873201.pdf

What do you guys think?

Schroedinger

I think "absolute maximum" and "outside the functional limits of the processor" say very eloquently anything I could possibly say on the subject.

Oh hell.

If you're engineering a chip, electron migration, electron bleed, and process limits are your enemies. Heat just dropped off the list; the material can run at maximum efficiency without generating enough heat to concern the process at 45nm, (or so I believe we are learning). This doesn't mean that SUBambient cooling, e.g. LN, won't be effective. The process still benefits from the switching efficiency gains of ultralow temps; it's just that you aren't -creating- the heat anymore. That means that water, HSF's etc., are going to be less useful at 45nm and probably gone at 32.

Voltage, oddly enough, still beats your process with a pipe regardless of temperature. This was always true, it just used to be that you'd burn a chip on air before you fried it. An uncooled chip used to get hot before it fried. Not so 45nm. You can run it on 1.45 stable because the process limits heat creation so heat instability doesn't happen. That doesn't mean you aren't on the exponential part of the electron migration curve.

crazypip666

I think it's very important that people see this and understand just how much more sensitive 45nm cpus are to voltage.

RussianGrimmReaper

This breaks my heart, I really hope the revision and 32nm die shrink aren't as fragile as this.

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[NuC] R4v3N

NO KIDDING! I will stick with my kentsfield. It has 2 more cores and OCs just fine.

RickJS

I can almost guarantee you it will.

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pow3rtr1p

Good think I hit 4 GHz below 1.3625V

justarealguy

Same, I need more cooling to hit 3.5+ and I'm set. Really, the Q6600 G0 is such an awesome performer, OCs well...lol. And you can put more voltage in it ^_^

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thealmightyone

The E8XXX may be more vulnerable to voltage, but don't need as much voltage as Conroe to overclock. I hit 3.6GHz on stock volts, and that's only with an 8200.

Gollie

They will iron this out with future revisions...

You just don't buy high tech equipment so soon after it comes out. PC hardware (CPU, GPU, RAM, MB) is usually quick to mitigate the inevitable release bugs, only taking 6 months or so.

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