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First post, by zsolex

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Hi,

I have motherboard above with 4x4Mb Ram. I have tried with DX4-100 (Intel and Amd version) and it performs very badly. Norton speedtest gives 66points. (DX2-66 hits 133 on other mobo).
I have also tried with DX2-66 and I got 33points. Speedsys shows 10Mb memory bandwith, I think it is very low it should be 60-70Mb.
Current config has DX2-66 and 4x1Mb Ram and I got only 5points.

Bios: 11/17/94 sis-85c471 i486sv2g-00 #401a0-0304

I really do not understand what is going on.
Maybe it has bad BIOS inside or memory controller is bad or some jumper settings..
HWI shows DX4 processor as DX2..

Unter the installed RAMs there is possibility to "put" resistor network to socket. It has two socket and only one has resistor network. Is that usual?

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  • DX4 info shows DX2.jpeg
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    DX4 info shows DX2.jpeg
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  • DX4 norton.jpeg
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    DX4 norton.jpeg
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  • AmdDX4.jpeg
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    AmdDX4.jpeg
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  • 486dx4 as dx2.jpg
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    486dx4 as dx2.jpg
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  • vl-i-486svg0x4-1.jpg
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Last edited by zsolex on 2021-10-27, 08:47. Edited 1 time in total.

Reply 4 of 4, by zsolex

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with DX2-66 it seems to work.
I am using speedsys, is the memory bandwith not too low(31Mb vs usualy i see 70MB with other mobo)?

I have folowing Problem now:
-does not start with one double sided 72 edo ram (32M)
-does not start with two singe sided 72p ram (2x16M)
-it oly starts when I fit 30pins bank full (ie. 4x1M or 4x4M) plus the 32M edo ram (total 36M or 48M)
-if I put AMD DX4-100 (with jumpering) it looks to work but speedsys is freezing after processor speed test, actualy at RAM test
-cachecheck shows divide error..

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  • DX4diverr.png
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    DX4diverr.png
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  • DX2speed.png
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    DX2speed.png
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    721.69 KiB
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    556 views
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    Public domain
  • DX2ok.png
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    DX2ok.png
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