Sign in with
Sign up | Sign in
Your question

P4P4 and the Prescott CPU

Last response: in Motherboards
Share
November 2, 2004 8:27:48 AM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

One more time ... will the Prescott 533 FSB 2.8 MHz with the 1 MB Cache work
on my "old" P4PE MB? Assuming it will, does the P4Pe Bios need to be
updated (Currently @ 1002)? Also, does anybody have a feel on the
performance improvement going from the Northwood 2.53 to the Prescott 2.8?
Thanks.

More about : p4p4 prescott cpu

November 2, 2004 11:23:59 AM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

In article <Lp6dndpqf76p8hrcRVn-gg@comcast.com>, "Ken"
<krlorenz@comcast.net> wrote:

> One more time ... will the Prescott 533 FSB 2.8 MHz with the 1 MB Cache work
> on my "old" P4PE MB? Assuming it will, does the P4Pe Bios need to be
> updated (Currently @ 1002)? Also, does anybody have a feel on the
> performance improvement going from the Northwood 2.53 to the Prescott 2.8?
> Thanks.

http://www.asus.com.tw/support/cpusupport/cpusupport.as...

There are no entries listed with "90nm" mentioned, and there
are also no CeleronD processors listed either. That means no
Prescott processor for that board. Virtually all the entries
are for Northwood.

There are a couple of things that can hold back introduction
of a new processor. One is the Vcore circuit, its voltage
range and current output capabilities. Asus has a fairly
lengthy list of motherboards that support Prescott, and
Asus seems to support both high and low power Prescotts with
their boards. A high power Prescott is around 115W, and that
is likely too much for your board.

The second thing is BIOS, and that is easier to fix. But
even for the "supported" boards, the time from processor
introduction to BIOS fix, is a long one.

You can use the cpusupport web page, to find all motherboards
that support a given CPU. Click "CPU Name" and select the
processor you are interested in, to see what boards can be used
to run a Prescott.

From the "CPU Name" thing, I notice P4PE2-X is listed as
being able to handle a Prescott. Have a look at page 16, where
there is a picture of the motherboard. The Vcore circuit on
that board is redesigned, and uses two high side MOSFETs in
parallel on each phase. That would help handle the higher
current demand. (The P4PE-X/TE rev 2 is also listed, but it
would be virtually impossible to find a picture of that, as
they don't update the picture in the manual when the board is
revved.)

http://www.asus.com.tw/pub/ASUS/mb/sock478/p4pe2-x/e156...

As for performance, the Prescott has a longer pipeline, and
that is balanced by the larger cache. In other words, the cache
is not a simple bonus - it is helping compensate for a performance
loss when the pipeline contents are tossed. If you need exact
benchmarks, see the review sites like Anandtech or Tomshardware.
Otherwise, a 10% improvement might be a guess, hardly worth wasting
money on if you already own the 2.53GHz processor. For the 10%,
it might be easier to just overclock a bit, assuming the ram can
handle it.

HTH,
Paul
November 2, 2004 3:09:53 PM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

Thanks for the information. I'll stick with what I got and be happy!

"Ken" <krlorenz@comcast.net> wrote in message
news:Lp6dndpqf76p8hrcRVn-gg@comcast.com...
> One more time ... will the Prescott 533 FSB 2.8 MHz with the 1 MB Cache
> work on my "old" P4PE MB? Assuming it will, does the P4Pe Bios need to be
> updated (Currently @ 1002)? Also, does anybody have a feel on the
> performance improvement going from the Northwood 2.53 to the Prescott 2.8?
> Thanks.
>
Anonymous
a b à CPUs
a b V Motherboard
November 2, 2004 8:26:52 PM

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

Ken wrote:
> One more time ... will the Prescott 533 FSB 2.8 MHz with the 1 MB
> Cache work on my "old" P4PE MB? Assuming it will, does the P4Pe Bios
> need to be updated (Currently @ 1002)? Also, does anybody have a
> feel on the performance improvement going from the Northwood 2.53 to
> the Prescott 2.8? Thanks.

Ken,

I have to agree with Paul on this one. The noticable gain could be achieved
by running a bit out of spec. I run a 2.8 Northwoods on a P4P800 that is
clocked to 3.25 on air cooling without a hitch. It is quite fast and you do
notice the boost over the stock 2.8 speed. Why not give it a try? Just
watch your temps and I bet this will be the best free "upgrade" you have
ever "bought"!

Shannon
!