A7V8X-X with 1 x 1GB DDR333

I have an Asus A7V8X-X motherboard (using Athlon XP 2700+ CPU) and am
trying to use one 1GB DDR333 DIMM in the system and it simply will not
accept it, it only sits there and beeps. When I swap it out for 2 x
512MB DDR333 DIMM's it works fine. (the reason this is a problem is I
want to use 2 x 1GB DDR333 DIMM's to make use of the 4 bank limit at
333MHz FSB setting and therefore cannot use any 512MB DIMM's).

Naturally I thought I had a bad DIMM from the vendor, but I popped the
1GB chip into my Asus A7S333 motherboard and it posted, booted and
worked perfectly for hours while I gamed (trying to test it for any
faults, etc).

Anyone have any suggestions or experience with this motherboard using
one 1GB DIMM?

Lastly I should mention that I am not trying to overclock or do
anything silly, just trying to use default speeds and configurations
to get it setup.

Thanks for any information anyone can provide.

Ratphace