Kobian KT133 FSX - CPU detect problem

Last Monday, lightning struck a friend's house and damaged several
computers that are connected as a neighbourhood LAN. In one of these
some chips on the mobo were literally blown up. I removed the
processor (an Athlon XP 2400+) and asked the owner and his uncle (a
close friend and fairly computer-savvy) to try it out on one of the
uncle's machines, a 4-year old Duron 1.1G on a Kobian KT133 FSX mobo.

They reported that it was OK, ran various software without a hitch.
But when they reinstalled the original CPU (the Duron), it refused to
boot up. They brought it in and I tried it myself - No beeps, no POST.
The CPU fan turns, front panel light comes on, but that's all. Cleared
the BIOS, no difference. I put in the nephew's lightning-struck CPU,
it runs fine.

I put the now-suspect Duron into another machine (Asus A7N266-VM mobo)
and it works perfectly.

With BIOS settings at default, the KT133 comes up with odd frequency
values for the 2400+, like 213x7.0 = 1491 MHz (about equivalent to an
1800+ ?). Even with manual settings, it still stays close to these
figures. This may simply be the old mobo's inability to cope with
faster CPUs. But I'm puzzled by its failure to work with the Duron at
all, something it's been doing happily until yesterday.

The few jumpers don't seem to be critical, and are shown on a paper
chart pasted inside the case. There are also three DIP switch blocks
(one 4-way and two 6-way) that the chart describes as "...factory
reserved for future support (don't adjust the default setting)". The
owner is a prudent type and I believe him when he says that he didn't
change any DIP switch setting.

I downloaded the manual from the Kobian website, but it seems to be
for an entirely different mobo ! Even the physical appearance is quite
different.

Any ideas please ? And could someone please supply the default DIP
switch settings ? TIA.

On Fri, 20 Aug 2004 08:53:37 -0700, Zotin Khuma wrote:

 > With BIOS settings at default, the KT133 comes up with odd frequency
 > values for the 2400+, like 213x7.0 = 1491 MHz (about equivalent to an
 > 1800+ ?). Even with manual settings, it still stays close to these
 > figures. This may simply be the old mobo's inability to cope with
 > faster CPUs. But I'm puzzled by its failure to work with the Duron at
 > all, something it's been doing happily until yesterday.
 >
It's a case of the software you're using giving you bogus info. The KT133
chipset isn't capable of FSB speeds of more than about 116MHz, with 100MHz
being thr official max speed. The default multiplier of the 2400+ is 15,
so as default it would run at 15x100 or 1500MHz. I suspect that if you
reset the bios the Duron will work.

 > Any ideas please ? And could someone please supply the default DIP
 > switch settings ? TIA.

I was going to dl the manual, but I'm not registering just to get it.

--
Abit KT7-Raid (KT133) Tbred B core CPU @2400MHz (24x100FSB)
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