Archived from groups: alt.comp.periphs.mainboard.asus (
More info?)
In article <47ec1f21.0404081449.6f82f74d@posting.google.com>,
geoffblanduk_nospam@yahoo.co.uk (GB) wrote:
> What settings should I have in the BIOS for a P4S533-MX M/B with a
> Pentium4 2.4Gz CPU. POST currently shows the CPU as 1200MHz (2 CPUs in
> fact as it's hyperthreaded) rather than 2400Mhz CPUs.
>
> The BIOS settings for CPU speed are 1200 | 1600 | Manual
> CPU Frequency is set at 12 (can't modify that)
> CPU External Freq is currently 133/33 but can be modified in steps.
>
> From reading the manual it suggests I up the CPU External Freq to up
> the CPU speed - but that would mean upping it to 266MHz which doesn't
> seem correct to me?
>
> Memory is DDR3200 (I had a spare 3200 so used it rather than buy
> 2700).
>
> Thanks for any help...
You are using a 2.4-C processor. It normally has a FSB rate of
800MHz. Your motherboard offers FSB rates of 400MHz or 533MHz.
The processor core speed is being scaled down by the lack of a
proper 800MHz bus option. You should have bought a 400MHz or
533MHz bus processor. For more info on the various
types, try
http://processorfinder.intel.com
From this Newegg page, you can see at least three options
currently available:
http://www.newegg.com/app/ViewProduct.asp?catalog=343&DEPA=0&submit=property&mfrcode=0&propertycode=&propertycodevalue=4186
Pentium 4/ 2.4B GHz 533MHz FSB, 512K Cache (Northwood 533) $147
Pentium 4/ 2.4A GHz 533MHz FSB, 1MB L2 Cache (Prescott) $150
Pentium 4/ 2.4C GHz 800MHz FSB, 512K Cache (Northwood 800) $169
The third one is the one you bought. It ends up underclocked on
your motherboard. The first one will definitely work. The
second one has only been shipping for a short time, and has
a larger cache. (You can look for your motherboard here
http://www.asus.com.tw/support/cpusupport/cpusupport.aspx
Notice that the 2.4A (Prescott) is not listed on the cpusupport
page for your board. I cannot really say for sure whether that
Prescott above will work on your board or not, as the BIOS may
get tripped up by something inside the new processor.
So, the first processor is one option for you.
(Also note - there are also Pentium processors with -E in the
name - these are Prescott processors with FSB800, newer
versions of the -C at FSB800. Just in case your vendor has
those as well, it would be underclocked on your board.)
As for trying to get there by overclocking, you would have
to go from 533 (nominal max rate = 4*133 quad pumped) to
800 (4*200 quad pumped). One board that supports that option,
after the board was manufactured, was the P4PE. I'm not
aware of other boards offering that kind of overclock.
A typical overclock on a 133MHz product would be about
160MHz, so give it a try and see how far it can be pushed
before it falls over. (160MHz means your processor will be
running at 1.92GHz, instead of the rated 2.4Ghz.) Place
one stick of memory in DDR Slot 2, for best signal integrity.
If you don't want to overclock your Northbridge like that, the
2.4B/533 processor is a better choice and will give you the
full 2.4GHz without problems.
HTH,
Paul
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