🚀 go-pugleaf

david grimshaw <david@dagwens.demon.co.uk> wrote:

>I help deciding which overdrive chip to buy
>I have a IBM PS/1 486sx25 Model 2133 154 it has an empty socket for a 
>Maths Co-processor which I believe will accept the Overdrive chip
>is this true? which would be the most suitable Overdrive chip the 
>dx2-50 or the dx4-75
>If anyone has upgraded and can give me some advice then it would be 
>most welcome

Just went from SX-25 to SX2-50. This merely involved a chip swap (push
pretty damned hard, but NOT at a non-verticle angle). Improvement is
good on games/dos software (near 2x), not so noticeable under Windows
95 (maybe 30% quicker)! I guess upgrading ram goes much further than
the CPU (starting from 486-25 with 8 megs). If you don't need the FPU
a SX2-50 is very cheap (but obviously not as good as a DX4). Check the
voltage requirements as you'll fry a 3.3v component - the DX2 and SX2
are virtually certain to be 5v (except DX2-66).