"Andy in NJ" SHORECOGS at COMCAST DOT NET wrote in message
...
Ok, here's my situation. I have an M7VIG Pro motherboard. The book
specifically states "Supports 2 DDR 200/266 MHz (without ECC) devices,
maximum memory size up to 2GB. Both slots can obviously support 1GB
modules
each.

I purchased (2) 1GB memory modules. They are labeled as "1GB DDR333 Module
16C". When I insert one of them, and turn on the computer, I get a long
beep
(a few seconds), silence, then beep-silence, over and over again until I
turn off the computer. If I put the other one in, the computer seems to
boot
up ok, but it's unstable. I can be using the computer when all of a sudden
it just reboots on it's own. If I put both modules in, I get a ton of
registry errors as it boots and the system loads, leading me to having to
shut it down. I've contacted the place I bought them from and they have
offered to replace the modules, but they insist that all memory is tested
prior to shipping so it is unlikely that they are defective.

The only possible cause to this whole thing is my system bus speed. It is
supposed to be capable of running at 133MHz, but when I remove the jumper
that the motherboard says I need to remove, the system won't even boot.
With
the jumper on the pins, the system boots, but the bus speed is 100MHz.

Is it possible the bus speed is causing the problem with the DDR memory
and
does anyone know what I can do to fix this?

--
73! de Andy KC2SSB
http://shorecogs.tripod.com
AIM: shorecogs

Possibly the DDR 333 memory may be having troubles with the 100 MHz system
bus (memory isn't always completely backwards compatible, especially when at
more than one "step" back). As you quite rightly point out to the other
poster trying to assist, you won't be able to run any memory diagnostics on
this machine until you can at least get it to POST and boot first. Some CPUs
don't like a 133 MHz bus speed - is the CPU designed to run at this bus
speed - if not, thats why it wont boot at this speed. The 16C on the label
would indicate the memory is indeed non-ECC (ecc memory has a couple of
extra bits for parity), so the other thing which may have something to do
with it is whether the memory is registered - perhaps the mobo doesn't like
whatever type you have in that regard. For example the Tyan Motherboard I
use on one of my machines will only accept registered memory, in terms of
whether its ECC or non-ECC, that doesn't matter as it will accept both types
in this regard. Does the memory supplier have any DDR 266 (PC2100) non
registered, non-ECC modules you could use instead - I doubt the supplied
modules are defective (although it does happen), more likely just
incompatible with this setup.

Paul