Hi
Is this configuration possible?
Now I got 2x256 pc2700 and would like to add 1x256 pc2700. But the manual
says:
When using PC2700 DDR DIMMs, the motherboard supports up to 2 GB system
memory. You may install two PC2700 DDR DIMMS in any two of the sockets.
Is anybody running Asus P4S333 with 3 PC2700 ram blocks?
/TJM
This is an issue with the loading caused by the modules. The
faster a memory bus is run, the fewer loads it can handle.
The answer to your question really hinges on whether your 256MB
DIMMs are single bank or double bank. If you had three single
bank 256MB DIMMs, then they should work at the rated speed.
If you had three double banked 256MB DIMMs, then that would
be too much load to run at PC2700, and the memory clock would
have to be reduced.
Sometimes it is tough to identify what kind of module
you've got, if the people who built it, didn't follow a
standard layout for the DIMM. Normally, a 256MB DIMM is
just a 512MB DIMM, where half the chips are installed.
A 512MB DIMM is made from (16) 32Mx8 chips, and eight
chips are on one side and eight on the other. To make
a 256MB from this DIMM layout, only eight chips are
installed, and they are all on one side. This is a
single bank DIMM.
It is also possible to put two banks on one side of
the module. You would need four x16 chips in each
bank. All eight chips could be placed on one side
of the DIMM, but that wouldn't be a very smart way
to lay out a DIMM.
With these difficulties in mind, it may be easier
to use a utility to read what the memory config
is, as viewed by the computer. Perhaps a utility like
Sandra or AIDA32 can tell you whether the DIMMs are
single or double bank (a.k.a "single sided" or "double
sided").
HTH,
Paul
