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Technical question on motherboard

That is one option I considered. As I mentioned previously, we have
another MB. I may either swap motherboards or possibly the CMOS ROM and
see what we can do.

On 01/01/2010 10:15 AM, Daniel Feenberg wrote:
> On Fri, 1 Jan 2010, Jerry Feldman wrote:
>> At work I've got 4 systems that are using a Supermicro X7DB8+
>> motherboards. 3 of these systems happily are set up with 64GB (16 4GB
>> Kingston memory sticks). The 4th system is having trouble recognizing
>> the 4GB sticks. When we originally got the memories for the other
>> systems, we had to download and flash a BIOS. But, this last system
>> still does not work with the 4Gb sticks. When I originally put them in=
>> the machine did boot, but hung on udev. Now, I can't even get the syst=
>> to come up in the BIOS. (note that I wear an anti-static strap when
>> replacing the memories so zapping the memories should not come into
>> play).
>> I've reflashed the BIOS a few times. One possible suggestion I receive=
>> was to change the 1GB PCI memory hole from 256 to 1GB.
>> One clue is that I do receive a message: "0251: System CMOS checksum b=
>> - Default configuration used".
>> I'm just looking for some suggestions, or some help to carry the syste=
>> to the roof so I can export it to the parking lot.
> We have such a system, it works with 4 GB sticks but had a tendency to
> crash with all the memory slots filled. It also came with an ethernet
> remote console that we have not been able to make work.
> As for your problem, don't you think you have a defective CMOS chip?=20
> I have had good luck buying replacement CMOS chips from
> or maybe Supermicro would send a replacement
> without having you return the board, or you could swap chips with one
> of your working systems, if you can afford to have 2 down at once.

Jerry Feldman <gaf-mNDKBlG2WHs at>
Boston Linux and Unix
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