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Hardware => 1980s => Computer Hardware => 486 (Apr 1989) => Topic started by: chrisNova777 on September 05, 2015, 12:23:27 AM

Title: Asus 486SV2G motherboards may require 5V CPUs
Post by: chrisNova777 on September 05, 2015, 12:23:27 AM

just to bookmark a note i found on the net:
https://groups.google.com/forum/#!topic/alt.comp.periphs.mainboard.asus/_eVsLLI7GTM

this may be correct or incorrect; not sure but:

Quote

The ASUS 4866SV2G motherboard does not support 3V CPUs like the Intel 486DX4/100MHz.
The 486SV2GX4 or PVI-486SP3 supports the 3V CPUs.
For the 486SV2G, you can upgrade your CPU to 486DX2/66MHz, AMD 486DX2/80MHz.

Quote

heres a list of the 3.3v cpus
that are probably not compatible (at least the ones made by AMD):
25MHz:
Am486 DX4-75   25 MHz   75 MHz   3.3 V   8 KiB WT   
Enhanced Am486 DX4-75   25 MHz   75 MHz   3.3/3.45 V   8 KiB WB

33MHz:
Am486 DE2-66   33 MHz   66 MHz   3 V   8 KiB WT   1996(?)
Am486 DX4-100   33 MHz   100 MHz   3 V
Enhanced Am486 DX2-66   33 MHz   66 MHz   3.3/3.45 V   8/16 KiB WB
Enhanced Am486 DX4-100   33 MHz   100 MHz   3.3/3.45 V   8/16 KiB WB

40MHz:
Am486 DX4-120   40 MHz   120 MHz   3.3 V   8 KiB WT   
Enhanced Am486 DX2-80   40 MHz   80 MHz   3.3/3.45 V   8 KiB WB
Enhanced Am486 DX4-120   40 MHz   120 MHz   3.3/3.45 V   8/16 KiB WB

http://web.archive.org/web/20030419164305/http://www.geocities.com/TheTropics/3337/sv2gx4.html
http://web.archive.org/web/20011221115041/http://www.ecst.csuchico.edu/~dranch/HARDWARE/asus-gx4.html


for cpu reference; see this page: https://en.wikipedia.org/wiki/Am486
(chart attached as image)
also benchmarks here: http://www.oldschooldaw.com/forums/index.php?topic=1227.0