Pentium 4 2.8GHZ showing 1.87GHZ.

hwmgr

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I recently removed a celeron 2.0GHZ from my mobo and installed this 2.8ghz pentium 4..

Mobo- Zebronics ZX-945-15 (i915 chipset, which says to support 400/533/800mhz fsb as in the manual..) with 1gb ddr2..

Celeron which i had- http://ark.intel.com/products/27174/Intel-Celeron-Processor-2_00-GHz-128K-Cache-400-MHz-FSB

Pentium 4 which i have now- http://ark.intel.com/products/30764/Intel-Pentium-4-Processor-520521-supporting-HT-Technology-%281M-Cache-2_80E-GHz-800-MHz-FSB%29
Problem is that my celeron used to run @ 2.66GHZ with 20x multiplier.. (20*(533/4))...
But this pentium 4 is only running @1.87GHZ with 14x multiplier.. (14*(533/4))...
BIOS detects it as Intel(R) Pentium(R) 4 CPU 2.8GHZ
Tried testing speed with high usage (wPrime benchmark) but it did'nt overclock..

I have explored the bios and could'nt find any setting about multiplier or voltage adjustment..
Is there any way to increase this multiplier.. Any wire mod or something like jumper settings..

CPU-Z Log-

7272504780_0224756cc0_b.jpg
..
 
Solution
G
Hmm, if 533MT/s is 12 23 12
then 800 MT/s should be 23 12 12.
Maybe set the FSB then load defaults in BIOS or clear the CMOS before booting.

correon

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Forget my other post :)

You need to change multiplier to 21 for the Cpu to run 2.8 Ghz - look where it says cpu

- and disable any power saving features - allso in windows - check power features

in control panel and run cpu on full power
 

hwmgr

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I can't figure it out in bios, can you.. ??
Here's how my bios looks like:

In CPU:
7272691370_e1b8385aa5_b.jpg



In Chipset:
7272690656_87f550b3c1_b.jpg



In Power:
7272690064_31c8cc5982_b.jpg
 
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Guest

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Guest

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Found this on the forums:


ic36reak3r 07-22-2010 at 04:40:27 PM

Left to right...123.

FSA = 1-2
FSB = 2-3
FSC = 2-3

punches the system to 800 MT/s

Try it....
 

hwmgr

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ok, i tried every combination possible, and here are the results..
These are from Left to Right according to the diagram... (FSB, FSA, FSC)

12 23 12 Default (in the diagram), where it's 533mhz fsb.

12 23 23 The one you preferred, and now CPU-Z shows 400mhz FSB, 100mhz Bus Speed, so now processor is at 1.4GHZ.. :heink:

12 12 23 System Won't Start.

12 12 12 System Won't Start.

23 12 23 System Won't Start.

23 12 12 System will go to WinXP loading screen and then restarts..

23 23 12 System Won't Start.

23 23 23 System Won't Start.

Now what to do??
 

hwmgr

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U sure??

acc to the diagram FSA is in middle, so it should be
12 23 23..

And above you say 23 12 23..

Tell me acc to the diagram...
 
G

Guest

Guest
Hmm, if 533MT/s is 12 23 12
then 800 MT/s should be 23 12 12.
Maybe set the FSB then load defaults in BIOS or clear the CMOS before booting.
 
Solution

hwmgr

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Ok, the results are pretty weird..
Firstly i wanna thank you both, correon and interocitor, the settings worked after resetting BIOS...
But then when i was just about to write this reply, a BSOD appears and PC restarts...
Then i tried enabling hyperthreading and PC won't go beyond loading screen...
I opened the case to change again and whamm, CPU was boiling like hell, now running @ 533mhz default setting and it's functioning normally...
I think cooling is not sufficient as i am using my celeron's heatsink and fan assembly, which was a Northwood core..
I have read that prescotts notoriously get much more heated up during operation than Northwoods..
So, do i have to change my fan & heatsink??
Can you suggest some fan for prescott??
 

correon

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Yes and they are known as "Presshot" - well the cpu can throttle down if getting too hot or not sufficient cooling - hmm i think only place to look is Ebay "places" and other online action houses..
 

hwmgr

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can you suggest some??
Searched on Ebay but don't know what can keep these 'presshots' cool..
Coolermaster looks ok but seems to be more expensive than the processor itself.. :p
don't know about other brands..
 
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Guest

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Did you use a thermal grease!?
They don't include socket 478 support in modern coolers. The Zalman CNPS7700 for 478 should be more than enough.

EDIT: Or the Zalman CNPS7500 for 478.
 

hwmgr

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Well, this heatsink has a layer of thermal grease on it, but going to apply a new one...
If does'nt work, then'll look at these fan options too...

Thnx for the help... :wahoo:
 

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