AMD Athlon XP 2400+ showing as 1800+

[Amit]

Hi,

ASUS A7V400-MX motheboard
AMD Athlon XP 2400+
256 MB DDR RAM

I recently got my motherboard replaced from A7N266-VM to A7V400-MX
after the previous one stopped working. It was under warranty so they
gave me a replacement board which is working fine except for one thing
- now it shows that my processor is Athlon XP 1800+ instead of Athlon
XP 2400+. Also the CPU speed is 1.5 Ghz instead of the usual 2.0 Ghz.

Any guesses what could be the reason?

Also from A7V400-MX, I understand that the top FSB speed supported is
400 MHz. But the motherboard switches settings are at 100 MHz - and in
the manual it is written that the switches settings matter only if its
an unlocked CPU.
Two questions -
1) How do i know if my CPU is locked or unlocked?
2) How can i check what is my actual current FSB speed?

Thanks.

 

[paulmd]

Hi,

ASUS A7V400-MX motheboard
AMD Athlon XP 2400+
256 MB DDR RAM

I recently got my motherboard replaced from A7N266-VM to A7V400-MX
after the previous one stopped working. It was under warranty so they
gave me a replacement board which is working fine except for one thing
- now it shows that my processor is Athlon XP 1800+ instead of Athlon
XP 2400+. Also the CPU speed is 1.5 Ghz instead of the usual 2.0 Ghz.

Any guesses what could be the reason?

Also from A7V400-MX, I understand that the top FSB speed supported is
400 MHz. But the motherboard switches settings are at 100 MHz - and in
the manual it is written that the switches settings matter only if its
an unlocked CPU.
Two questions -
1) How do i know if my CPU is locked or unlocked?
2) How can i check what is my actual current FSB speed?

Thanks.

Look in the BIOS, is there a frequency/voltage control menu item or
something CPU-ish sounding?

 

[Paul]

Look in the BIOS, is there a frequency/voltage control menu item or
something CPU-ish sounding?

That board has a five position DIP switch in the upper right hand
corner of the board. The manual doesn't make it very clear, as
to when the DIP switch is to be used, but I would just set the
switches to the correct position for the required frequency for the
processor.

One poster noticed that there is a difference between the printed
manual that accompanies the product, and the PDF file you can download
from the Asus web site. The switch settings for 200MHZ (=FSB400)
differ between the two documents. The PDF manual, downloadable
from the Asus site, I believe has the correct diagram. The poster
also provided a picture of the switch settings, which is still here
for viewing. One half of the picture, is a scanned image of the printed
manual, while the other half of the picture is taken from the PDF
version of the manual.

http://alibosworth.com/transfer/a7v400_problem.png

Paul

 

[Darklight]

Hi,

ASUS A7V400-MX motheboard
AMD Athlon XP 2400+
256 MB DDR RAM

I recently got my motherboard replaced from A7N266-VM to A7V400-MX
after the previous one stopped working. It was under warranty so they
gave me a replacement board which is working fine except for one thing
- now it shows that my processor is Athlon XP 1800+ instead of Athlon
XP 2400+. Also the CPU speed is 1.5 Ghz instead of the usual 2.0 Ghz.

Any guesses what could be the reason?

Also from A7V400-MX, I understand that the top FSB speed supported is
400 MHz. But the motherboard switches settings are at 100 MHz - and in
the manual it is written that the switches settings matter only if its
an unlocked CPU.
Two questions -
1) How do i know if my CPU is locked or unlocked?
2) How can i check what is my actual current FSB speed?

Thanks.

check the manual and see if you have the correct jumper settings for fsb

 

[Amit]

I think my current DIP switches settings are all in OFF position which
I guess, means that it defaults to 100MHz speed.
I will try to change it to 133 MHz settings. Also I noticed that my
motheboard itself has the settings printed on it which matches with
those given in the online manual from ASUS website. Then there should
be no confusion regarding the switch positions.

Regards.

 

[Amit]

Yeah.. that was the DIP switch problem. I set it to 133MHz position and
it is showing as 2400+ now. Thanks guys.