Problem adding memory


Feb 10, 2012
My PC came w/ two 256 MB sticks installed at the factory. I checked and found I could install two 1024MB sticks in place or the original sticks. I bought and installed the new sticks. The machine wouldn't function. I tried one 1024 and one 256 and it works fine. I tried the other 1024 MB stick and it works I know that both 1024 sticks work...they just won't work together. I'd like to have the full 2GB of memory. Any ideas on what could be the problem? To anticipate any questions I'll include some info on my machine.
eMachines T-3104
Windows XP Home Edition (5.1, Build 2600) Service Pack 3
Phoenix - AwardBIOS v6.00PG
AMD Sempron(tm) Processor 3100+, MMX, 3DNow, ~1.8GHz
1214MB RAM
Page File: 767MB used, 7107MB available

Model: ST3120022A(Seagate, 120G)
Media Type: Fixed hard disk media
Size: 111.79 GB
Interface Type: Parallel ATA
Free Space: 55.75 GB

Bank Label: Bank0/1
0406 - Speed : NULL MHz
0407 - Total Width : 64 Bits
0408 - Capacity : 256.00 MB

0405 - Bank Label: Bank2/3
0406 - Speed : NULL MHz
0407 - Total Width : 64 Bits
0408 - Capacity : 1.00 G
I would shut down and unplug the psu and remove the cmos battery and wait a few minutes and then put the battery back in and plug in the psu and see if that made a difference. What that does is reset the bios and it may help or may not but it is something to try. Also when you have the battery out remove the ram and put in the two new sticks of ram before you put in the battery. Like I said this may help but there's not guarentee.