maybe your mobos limit is 512mb
whats your system specs?
model of motherboard etc
Sorry, it comes up as ram on Google lol.
Where does it say you have 512mb? Download CPU-Z and check.
Says 1gb right on the ram.CPUZ said:DIMM #2
General
Memory type DDR
Manufacturer (ID) Micron Technology (2CFFFFFFFFFFFFFF)
Size 512 MBytes
Max bandwidth PC3200 (200 MHz)
Part number 8VDDT6464AG-40BC1
Serial number FFFFFFFF
Manufacturing date Week 255/Year 255
Attributes
Number of banks 1
Data width 64 bits
Correction None
Registered no
Buffered no
Nominal Voltage 2.50 Volts
EPP no
XMP no
what do you have in dimm1?
If you don't have anything move the 1GB into that.
take it out and put JUST the 1gb in there, then if it's ok put the 256 in dimm2.