After some trawling I found some info that may be of interest to all :
Warning about 256MB PC133 SDRAM modules :
Todays market offers 256mb PC133 SDRAM modules built from 256Mbit chips, which are incompatable with the boards on some older chipsets. These modules are built with 8 chips (in case of no ECC support) and 9 chips (in case ECC is supported).
To the chipsets, which are unable to work with these 256mb modules:
- Via Apollo Pro 133 and older VIA chipsets:
- Intel BX, LX, EX and i810.
These modules are supported without any trouble by:
- VIA Apollo Pro 133A and newer solutions;
- All AMD chipsets from AMD, VIA, SiS, and ALi (except Asus K7V)
- Intel 810E and Intel 820E2 and entire Intel 815 family.
As my motherboard the Abit BE6-11 is based on the Intel BX chipset I can only presume that's why it won't work. Shame they don't give a warning before you buy it, I shall be taking this up with the suppliers tomorrow.