I have 1GB kit (512MBx2), Ballistix 240-pin DIMM, DDR2 PC2-8000 memory module part #BL2KIT6464AA1005 installed and i also have 1 GB of PQI25400-1GDB PC2-5400 memory. Can I add the 2 512 PQI modules in with the crucial or will it cause problems?