"Pete Wood" said:
Hi, have aquired anotha Stick of Corsair xms 512mb 3200c2pt which is the
same specs as the the other two sticks of ram already installed. When
booting up, a beep sounds and a message BIOS CECKSUM ERROR appears with
INSERT SYSTEM MEDIA DISK IN FLOPPY A.
I have swopped the sticks around and all work correctly until i put a 3rd
stick in and then thw msg appears again!
Any ideas anyone?
Thanks in advance.
Pete
I never had any problems using two or three sticks of CAS2
(Ballistix) PC3200 on my A7N8X-E. The firmware hub would
be connected to the Southbridge, and you would think the
presence or absence of memory would not affect it. Perhaps
it is an onboard chipset voltage supply issue, or perhaps you
are just too close to the limits for your board. Remember, that
the very first A7N8X boards seemed to have problems with
chipset voltage, that were never explained. I played with
the chipset voltage on my system, and never saw any real
dependency on the voltage (increased voltage just made the
chips hotter, with no performance gain that I could see),
so perhaps it had something to do with the stepping of
chipset chips being used.
To proceed further, someone answering your question would
need to know which revision of board (printed in white letters
on the motherboard, like 1.04 or 1.06 etc), which BIOS revision,
what processor, FSB and memory clock choices, what power
supply model (to check for adequate +5V rating - 25A) and
so on. These are two sites I would try doing some searches on.
These issues tend to differ from revision to revision of
motherboard - I believe different versions of chipset chips
may have been involved.
http://www.nforcershq.com/forum/search.php
http://forums.pcper.com/search.php (must register to search)
http://forums.pcper.com/showthread.php?t=225632&highlight=a7n8x+deluxe+checksum+error
The BIOS checksum error indicates the processor is having trouble
reading the flash chip at POST. It of course does not mean
the BIOS image is corrupted - it is rather more of an
"overclocking failure" indication, that the processor is not
stable at this point. (If you actually want to flash the BIOS,
you would want a stable hardware config before trying it.)
Are you Prime95 stable with two sticks ? Get a copy of Prime95
from mersenne.org and select the "Torture Test" option. That
test should run error free for hours, if your basic system
configuration is stable. If not, perhaps even your two stick
config is not healthy.
Paul
