Computer Memory Solutions 4GB DDR3 1066MHz SO-DIMM Panasonic Toughbook C1

System-specific DDR3 SO-DIMM

This 4 GB DDR3 module is built for the Panasonic Toughbook C1 series. It uses a 204-pin SO-DIMM form factor and runs at 1066 MHz with a CAS latency of CL7. The stick is unbuffered, non-ECC and operates at the standard 1.5 V voltage. It is sold as a single piece for a direct memory upgrade.

DDR3 1066 MHz interface limits

The DDR3 1066 (PC3 8500) interface caps transfer rates at this frequency, so the module cannot run faster than the platform allows. Voltage is fixed at 1.5 V and the timing is set to 7-7-7, leaving no headroom for manual overclocking. The SO-DIMM slot count in the target notebook restricts total capacity to the manufacturer's stated maximum of 6 or 8 GB depending on the exact sub-model.

4 GB single-stick capacity

This kit provides one 4 GB rank in a 2Rx8 organisation, which is the decisive figure for matching the Toughbook's expansion socket. The laptop ships with 2 GB or 4 GB soldered and one removable slot, so adding this module yields either 6 GB or 8 GB total. Buyers whose model already has 4 GB non-removable plus a filled slot cannot use this upgrade.