INtel P4 mobile rating

Intel / D102ggc2
February 15, 2009 at 05:03:44
Specs: Windows XP, 2.8ghz/2gb ram
hi there guys,

I got my hands on a cpu today, and it kind of throws me off in the following manner: it says 3.067 on the cpu, with 512mb L2 cache mem, and a 533 bus. i tested it in a Jetway 845DPRO that can only support up to 400 fsb. it booted and showed me 1.6ghz. so i went and looked up the cpu code, and got this link http://www.cpu-world.com/sspec/SL/S... and indeed on that page it shows this cpu with two different frequencies. it's new stuff for me, i can't grasp it. what does it mean? if i ran this cpu on a mobo that supports 533, would it show as 3.0ghz? I know that p4 is quad pumped, and that the 533 is actually 133x4. but using the same formula, the mobo only supports 400/4=100 mhz fsb. i see the mismatch. is that the cause it shows my cpu at 1.6ghz?

I always say it's best to doublecheck.


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#1
February 15, 2009 at 08:30:46
1st of all, do the math. 3.067GHz / 133MHz = 23x multiplier. Does you motherboard support 23x? I highly doubt it. Apparently the multiplier is defaulting to 16x, which is probably the highest your board supports...or did you set it to 16x?

All mobile CPUs have an unlocked multiplier. This is done so that the CPU speed can be varied thru Intel's SpeedStep technology. SpeedStep also varies the CPU voltage. When a laptop is under light load, SpeedStep will automatically lower the multi & volatge. This keeps the CPU temp down & it lowers the power requirement, thus providing longer battery life. As demand/load increases, so will the multi & voltage.

You're lucky that CPU even runs at 1.6GHz. Many times when a mobile CPU is installed in a desktop machine, the multi will automatically drop to the lowest allowable...usually about 6x. It can be overridden in the BIOS though IF the BIOS provides multi adjustment. If the BIOS doesn't allow adjusting the multi, you'd be stuck at 600MHz. Remember that mobile CPUs are not designed for desktop machines, therefore their CPU info is NOT contained in the BIOS. Their settings ALWAYS have to be manually configured.


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#2
February 15, 2009 at 08:46:17
JAM YOU'VE ENLIGHTENED ME AGAIN. I'm booting up to try it :)

I always say it's best to doublecheck.


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#3
February 15, 2009 at 08:52:30
ok it actually defaults to 12x. 12*133=1.6ghz

and here's nothing in bios about upping multiplier, since this is a bum mobo with agp4x and crap like that :) but at least i now understand the main difference between this cpu and that last p4 2.4ghz 1mb cache i had. difference is, this cpu is unlocked, and due to that fact it will run on lower multis and fsbs.

one love jam :)

I always say it's best to doublecheck.


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Related Solutions

#4
February 15, 2009 at 09:43:39
Several years ago, the hot setup for the socket A was to get an Athlon XP mobile Barton CPU. It didn't much matter which one, they all overclocked about the same. I still have a 2400+ AXP-M, although I'm not currently using it. It easily overclocked from 1.8GHz (13.5 x 133Mhz) to 2.2GHz (11 x 200MHz). It would go higher but I wanted guaranteed stability as it was on my main system. The average max overclock was about 2.4-2.5GHz but *some* reported going considerably higher. The trick is having the right motherboard & good cooling.

EDIT: just to add, the best socket A board for overclocking that I personally owned was the ASUS A7N8X-X. I also had a Shuttle AN35N Ultra which also was a good overclocker. I got a good deal on a SOYO Dragon KT600 which was a bit disappointing. It was a mild overclocker that was limited by the lack of CPU voltage adjustment, but with the help of one of the other guys who used to post regularly (Johnoh), I learned how to wire mod the CPU socket to alter the CPU voltage. If you wanna take the time to read, I posted about it:

http://www.computing.net/answers/cp...


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#5
February 15, 2009 at 10:45:41
quite the experimet there, man. my electronics guy toldme a story where he made a contraption like that.. in order to oc a cpu, made a separate power supply for it, and soldered it onto the mobo. you bought a mod, probably the same thing.

I always say it's best to doublecheck.


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#6
February 15, 2009 at 10:49:26
guess what :) i threw in a 1.5ghz p4, and it booted on 100x15 so the multi is not locked to max 12. then i looked in bios under miscellaneous, and guess what, multi setting exists up to 24x. why does it not show up when i use the 3ghz mobile cpu? the multi option is just not there :) i'm gonna download manuals for this mobo now.

I always say it's best to doublecheck.


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#7
February 15, 2009 at 10:53:37
bad link on the jetway website :( all 4 mirrors have a corrupt archive as a manual. please try the link http://www.jetway.com.tw/jw/downloa... and let me know if there's something wrong with my acrobat reader.

I always say it's best to doublecheck.


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#8
February 15, 2009 at 11:03:30
The manual downloads as a .RAR file (845DDA.rar)...you need to unpack it with WinRAR or something similar.

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#9
February 15, 2009 at 12:56:57
doh :) i know, it does unpack into a pdf, just not a whole file i guess.

I always say it's best to doublecheck.


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