Kayak XA-s CPU upgrade (66/100MHz)

[Gereon Wenzel]

I tried to swap the 266MHz CPU for a 350MHz,
but the board doesnt adjust to 100MHz bus clock?
The cpu comes up at 233Mhz.
I couldn't find differnt part ## for 66/100 MHz versions,
nor any switch or jumper to set the bus clock.
Anybody did the upgrade succesfully?
Installed memory is capable of 100MHz.

Gereon Wenzel

[Ben Myers]

Gereon,

The answer to your question lies in the chipset on the motherboard. If the
chipset is an Intel 440LX, the system is limited to 66MHz front-side bus. If
the chipset is Intel 440BX, 100MHz is possible somehow.

Either look at the devices shown in the Device Manager of the System icon in the
Control Panel or simply look at the chips on the motherboard itself.

If the system is limited to 66MHz, you have some chance of speeding it up by
using a Socket 370 Celeron installed in a Slotket converter, with a mximum of
533MHz... Ben Myers

On Thu, 29 Jan 2004 13:54:56 +0100, Gereon Wenzel <wenzel@ibh.rwth-aachen.de>
wrote:
I tried to swap the 266MHz CPU for a 350MHz,but the board doesnt adjust to 100MHz bus clock?The cpu comes up at 233Mhz.I couldn't find differnt part ## for 66/100 MHz versions,nor any switch or jumper to set the bus clock.Anybody did the upgrade succesfully?Installed memory is capable of 100MHz.Gereon Wenzel

[Gereon Wenzel]

Hi Ben,

Ben Myers schrieb: Gereon, The answer to your question lies in the chipset on the motherboard. If the chipset is an Intel 440LX, the system is limited to 66MHz front-side bus. If the chipset is Intel 440BX, 100MHz is possible somehow.

True, but the Kayak XA-s is BX based and capable of 100MHz.
It has no Jumpers for the bus Clock, but for the multiplication factor
only.
No idea what technique is used by the BIOS to determine the bus clock?
Either look at the devices shown in the Device Manager of the System icon in the Control Panel or simply look at the chips on the motherboard itself.

Didn't have to look, I replaced the board myself.

BTW the problem is solved!
It may has been caused but slow/bad coded memory modules?
Installed the 350 just again and got some system beep codes.
Replaced memory by known good branded 100MHz modules (the noname ones
installed had
100MHz stickers as well), set clear CMOS switch and machine came up
at 350MHz luckily.

Now to find another matching VRM...

Gereon