Select 2x jumper and it will run at 4x speed.

A don't have jumper for x2 , x3 or x4. it's auto detect, when i put a 486 dx2 66 it's ok (2x33), a pentium overdrive too (2.5x33) or a 486dx4 100 (3x33), i don't need jumper for, just change the CPU.

why the amd 5x86 133 can't to use x4 without jumper? i have the same problem when i put it on a msi 4144 board, never run to 133 only 100...

amstrad1640 wrote:

A don't have jumper for x2 , x3 or x4. it's auto detect, when i put a 486 dx2 66 it's ok (2x33), a pentium overdrive too (2.5x33) or a 486dx4 100 (3x33), i don't need jumper for, just change the CPU.

why the amd 5x86 133 can't to use x4 without jumper? i have the same problem when i put it on a msi 4144 board, never run to 133 only 100...

It's to maintain back compatibility with older motherboards that may not have a 4x jumper. Your machine was built before the 5x86 was made so it doesn't know what to do with it other than use the 3x setting that the DX4 chips used. A BIOS update might help, but I can't guarantee that. I don't know if HP maintains their support database files for machines that old, but you can try.

You may also need an upgrade adapter to use that CPU in that machine like the ones Evergreen made.

According to this, your MSI motherboard doesn't support the 5x86 natively. you'd likely need an adapter for that one, too.

http://stason.org/TULARC/pc/motherboards/M/MI … 86-MS-4144.html

Anyone think it would still be possible to attain 133Mhz by using one of those upgrade chips? Those often came with jumpers of their own 😉
Like the Kingston Turbochip or the Evergreen

Yes!
There is 3 jumper on Evergreen 5x86 133 (1 have them on my 2 vlb 486 computers )
On old 5v 386/486 vlb board and On a 486vlb 3.3v /5v i change it with a 3v 5x86 133/ 150 (3x50) i can't to have x4 (again 🙁 ) for 133 or 160 😉

One is detected at 120, but it's only on boot (i can't to update bios to have to the real name / speed), on dos with etdiag i have 4 x 33 =133 😀

The 3 jumpers are:

-WB or WT
-x3
-x2 / x4