Newsgroup: it.comp.hardware.cpu
Titolo: Mostrato (funzionante) P4 North a 3.5Ghz.

Goto 
http://213.219.40.69/28080117.htm
Non ci credevo, vista la L2 da 512Kb.
Ciao.
Alberto.

 Non ci credevo, vista la L2 da 512Kb.
Interessante... direi che possiamo attenderci un P4 3.5 tra un anno da ora.
Non che dobbiamo stupirci troppo... il passaggio di processo produttivo di
solito consente quasi il raddoppio di frequenza, e il willi è stabile fino a
2~2.2 GHz.
Saluti.
Uno Xelloss che prende atto di quel che legge.
--
Wilmer Ricciotti
wi...@bigfoot.com

 wrote in message
news:9mipns$pdg$1...@nreadb.inwind.it...

Su Anand si dice anche 
http://www.anandtech.com/cpu/showdoc.html?i=1525&p=2
che il NW 3.5 era raffreddato a liquido.
Oggi dovrebbe essere presentata alla stampa una ALU 8 ghz (4 double pumped)
facente parte di un futuro processore Intel.
While Intel clocked their Northwood at 3.5GHz, they ran through a pretty
intensive demo with the CPU clocked at 3.0GHz. The presenters seemed
surprised that they were actually up and running at 3.5GHz indicating an
unexpectedly high yield on the part. We were slightly disappointed to find
out that the system was supercooled but it does show off the potential of
the chip. Later today Intel will be showing off an air-cooled 4GHz double
pumped ALU (effectively 8GHz) from a future Intel processor. The interesting
thing about this demo is that it will be a 32-bit ALU that's being shown
off…

Da Tom's Hardware, report su IDF:
I piani di Intel prevedono i 4 Ghz entro il terzo trimestre 2002 e i 10 Ghz
entro tre anni, il tutto su Rambus e non su DDR.
The Intel Developer Forum Fall 2001 delivers the launch of the 2 GHz Pentium
4, and Intel's plans to ramp up to 10 GHz parts in the next 3 years. In
addition, Intel unveils Hyper-Threading.
Pentium 4 is operating at 2 GHz, but Intel is going to take it up to 10 GHz
in the next 3 years. That's big ass frequencies. Which means big ass
problems for electrical designers and motherboard designers.
RDRAM is the architecture that Intel has determined has the ability to best
meet the needs of its Pentium 4 roadmap into the future, and they just think
that all the issues regarding the stability of DDR266 and DDR200 have not
been addressed by the OEMs, although Floyd did admit that the OEMs are smart
enough to figure it out, but that Intel wants it to be a clean solution. You
could read that as, Intel wants to control the market, too.
Chiefly, Intel is used to calling the shots, and is just beginning to get
around to addressing the whole DDR thing.
Maybe Intel misjudged the adverse impact of transitioning to RDRAM without a
middle step. Maybe Intel just likes to have it its own way. Maybe Intel's
engineers were just convinced that RDRAM is the only way to go and that all
the other stuff is just short term.
Intel has to create a success out of RDRAM because, it has the memory I/O
that is best suited to the way the Pentium 4 executes and works. The Pentium
4 is a source synchronous device, it relies heavily on prefetch prediction,
it has a deep a execution pipeline that gets flushed every time there is a
misprediction, and that weighs heavily on the system performance.
Pushing the GHz barrier is critical to Intel's continued success as a
performance leader (apparently, you can do a few more mispredictions and
still catch up when you have those extra cycles to play with). Hence, RDRAM
provides the best solution for Intel from a strategic point of view. It's a
risky strategy, but necessary. There's no denying that "alternative" memory
I/O interfaces have proven themselves just as clever as RDRAM. In the
meantime, there's a lot that has to go on at the software level for full
exploitation of the Pentium 4's execution pipeline. Code compilers, and OS
optimization can only do so much.