My board is running a Pentium 166 MHz chip. It has 4 SIMMS slots and 2 DIMM slots. I have 16 MB sticks for SIMMS and the BIOS recognizes the 64 MB. When I add a 128 MB DIMM, the BIOS only sees 32 MB of it for a total of 98 MB. I know the 128 MB DIMM is good because I tried it on another system. I have an AWARD v4.51PG BIOS. I don't see any jumpers to set and I can't find anything in the BIOS setup to adjust memory. What can cause a BIOS to not see all of the memory present?
damien groves
12-21-2003, 03:15 PM
My board is running a Pentium 166 MHz chip. It has 4 SIMMS slots and 2 DIMM slots. I have 16 MB sticks for SIMMS and the BIOS recognizes the 64 MB. When I add a 128 MB DIMM, the BIOS only sees 32 MB of it for a total of 98 MB. I know the 128 MB DIMM is good because I tried it on another system. I have an AWARD v4.51PG BIOS. I don't see any jumpers to set and I can't find anything in the BIOS setup to adjust memory. What can cause a BIOS to not see all of the memory present?
You CANNOT use all or perhaps both the 72pin memory AND the other memory slots at the same time.
while some boards allowed both types mixed most do not.
if your board allows mixed memory, follow the rules below.
either use the first 2 72 pin slots and the LAST dimm slot or the reverse.
if you board does not allow mixed memory, run either sim "OR" dimm but not both. (since 64/128 meg dims are rather cheap this is the way to go)
Last: note that early boards like yours do not work with later high/ density memory chips/modules. you need to use low density memory chip/modules.
early chip modules will have 8 or 9 chips per side for 128megs
later modules will have 4 or 8 chips on only one side and will usually not work or only report half the true size.
It sounds like you need the slowest sdram PC100.
I two was having this problem adn I fixed it by using PC 100 sdram instead of the PC133. Also see how much ram can each slot handle.
Most older boards will only go up to the 256k sticks others up to 128k sticks.
i utilize all my memory slot by putting 64 mb in each of 4 slots just because of that my bios hang up not going further when i start the computer. so what can i do to start my computer? even i try to enter into bios setup but even then it says entering setup ....
