| I'll bet the issue is that the chipset only supports double-bank 256MB DIMMs. I know this problem all too well from working with motherboards built around 440BX chipsets. Note that problem DIMMs, in that size, will likely have chips on both sides: the issue is that they will be 4-bit wide chips, so that all the chips together form a single 32M x 8 byte bank. The ones that work would, then, be built from 8-bit wide or maybe 16-bit wide (haven't seen those on 256M DIMMS); these will have chips on both sides, of course, but what matters is that they will be organized as two *banks* of 16M x 8 bytes - just as if it was a pair of 128M DIMMs, one on each side.
This detail is rarely understood, let alone mentioned, in product descriptions. If you can look up the manufacturer's data, that should spell it out, but it's not always easy to get the exact part number of the DIMM. OTOH, I picked up a pair of double banked 256M DIMMs a month ago at a local computer show for $20 each - used, of course. I'm still wondering if the guys actually knew what I was talking about when I asked if they were double banked or if we all just got lucky. :-/ | |
the D810EMO board has a single DIMM slot, and the stick that I pulled out was a 64 MB DIMM . . .