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FSB problems with new mobo and XP chip

Hello,

Iv recently rebuilt my machine with a new mobo and cpu.  The mobo is a Gigabyte 7N400 Pro nForce2 Ultra 400 and the CPU is an Athlon Barton XP2800+

All went well, and I installed the cpu fine with some arctic silver and new fan suitable for up to XP3200+

It all booted up fine, and its been on for 24hours now with no stability probs or anything, but the problem that I do have is that the chip is only running at 1250mhz instead of 2.0ghz.

I have updated the BIOS to the latest release, and also installed CPU-Z which shows the information below!  Now the obvious error is that the FSB is running at 100.2mhz instead of 166.  Iv entered the BIOS in advanced mode and changed the FSB to 166, which makes no difference at all! iv played about with numerous settings in the bios and it makes no difference to the clock speed or the FSB speed in CPU-Z

Also in the CPU-Z it says the release is C1, but im positive when I ordered it it stated Rev2 of the board!  But im not sure how accurace CPU-Z would be for this?

My memory is 1gb of 3200 DDR400 but that is also showing in CPU-Z as 1gb of 3200 200mhz, but is that due to it being dual channel and me having 4x sticks of 256?

Any ideas or suggestions for the FSB problem would be mucho appreciated! thanks!

CPU(s)       
Number of CPUs      1
Name      AMD Athlon XP
Code Name      Barton
Specification      AMD Athlon(tm)
Family / Model / Stepping      6 A 0
Extended Family / Model      7 A
Package      Socket A
Technology      0.13 µ
Supported Instructions Sets      MMX, Extended MMX, 3DNow!, Extended 3DNow!, SSE
CPU Clock Speed      1252.9 MHz
Clock multiplier      x 12.5
Front Side Bus Frequency      100.2 MHz
Bus Speed      200.5 MHz
L1 Data Cache      64 KBytes, 2-way set associative, 64 Bytes line size
L1 Instruction Cache      64 KBytes, 2-way set associative, 64 Bytes line size
L2 Cache      512 KBytes, 16-way set associative, 64 Bytes line size
L2 Speed      1252.9 MHz (Full)
L2 Location      On Chip
L2 Data Prefetch Logic      yes
L2 Bus Width      64 bits
 
Mainboard and chipset       
Motherboard manufacturer      Gigabyte Technology Co., Ltd.
Motherboard model      nVidia-nForce2, x.x
BIOS vendor      Award Software International, Inc.
BIOS revision      FG
BIOS release date      10/11/2004
Chipset      nVidia nForce2 Ultra 400 rev. C1
Southbridge      nVidia nForce2 MCP rev. A4
Sensor chip      FFFF
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evismaniac
Asked:
evismaniac
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1 Solution
 
joinaunionCommented:
shut down computer there should be a jumper to clear cmos clear the cmos then reboot to bios screen then load default values then reboot then right clivk my computer see what you cpu speed is on the general tab.The reason to clear cmos is because at the manufacturers they use a different cpu then the end user.
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stockhesCommented:
If joinaunions suggestion does not work:

I also have a Nforce 2 ultra 400 but an EPOX
On this there is a jumper to force the FSB to 100Mhz (can be handy at overclocking- failures). This is from Nvidias reference design, but not all Motherboard makers include it,  but give it a try, if yours is set to 100 Mhz.

> Also in the CPU-Z it says the release is C1, but im positive when I ordered it it stated Rev2 of the board!  But im not sure how >accurace CPU-Z would be for this?

Chipset     nVidia nForce2 Ultra 400 rev. C1
 
which is the first Northbridge/SPP that officially supported FSB 400 and Dual channel
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evismaniacAuthor Commented:
Excellent, not sure why I didnt think of that but the switch was forcing it to run 100mhz.  Iv turned that off and its now picked it up as the 2800!  It did blue screen whilst booting, so i ran it at 133 and it was fine, iv now changed it back to 166 and its working fine now,  What sort of CPU temp should it be running at? currently about 52 degrees.  

Thanks for the halp, mucho appreciate it!

Name      AMD Athlon XP
Code Name      Barton
Specification      AMD Athlon(tm) XP 2800+
Family / Model / Stepping      6 A 0
Extended Family / Model      7 A
Package      Socket A
Technology      0.13 µ
Supported Instructions Sets      MMX, Extended MMX, 3DNow!, Extended 3DNow!, SSE
CPU Clock Speed      2079.6 MHz
Clock multiplier      x 12.5
Front Side Bus Frequency      166.4 MHz
Bus Speed      332.7 MHz
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stockhesCommented:

Gigabytes normally read the cpu temp from the built in diode in the cpu and not an external sensor. your readings will be up to 10 degrees higher than from an external diode.

please try to play a game or a burn in program and check the temp again

should not exceed 70 c maximum die temp is 85 C if i remember correct

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evismaniacAuthor Commented:
ah yes, i think I read that about gigabyte boards reading 10 degrees higher!

Thanks again for the advice!!! :-)
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