🚀 go-pugleaf

In article <ETOBKKC.93Jan21073459@pluto.eto.ericsson.se>, etobkkc@pluto.eto.ericsson.se (Karlsen Bjorn) writes:
>I have a 486DX-33MHz with 4MB RAM (4*1MB*9). Recently I got 1MB
>for free (4*256kB*3) and put them into my PC. 
>
>However, the new SIMMs are marked KMM59256AN-10. Does the "10"
>indicate that they are 100ns SIMMs? The 4MB already in my PC is
>70ns.

Yes, these are 100ns SIMMS.  Definitely NOT recommended for a 486DX-33
application.


>
>The PC seems to work as normal (I had to put the new SIMMs in bank 0),
>but I wonder if the new SIMMs are too slow. If so, would any errors
>be trapped by the parity error check (which I've enabled) or would
>the files I'm editing/saving be destroyed without me noticing it?
>
>To summarize: If my PC *seems* to work ok, is the new SIMM's speed
>ok, or can I expect errors in saved files?

Some brands of SIMMS often are underrated (ie. are capable of higher speeds
than the rating would suggest).  Others are very marginal.  (I had the
opportunity to test some fairly large batches of different brands of SIMM
modules with a calibrated stress tester that can push them down to 40ns).

If I were you though, I would try to exchange them to get 70ns or faster SIMMS,
or you'll be inviting trouble.

If there is a failure you're most likely to experience lockup; or a PARITY
ERROR and the system will freeze.

Alex

>
>-KKC-