Normal
It should only be the 4-core i7 parts that cannot use all four DIMM slots.All of the SO-DIMM modules are at 1.2V. This is typical for laptop memory. The high performance desktop RAM you see out there with high speeds and/or low latency timings use higher voltages, usually 1.35V, but some are even more. The memory should be able to be overclocked, and you can safely bump up the voltage to around 1.5V (JADEC standard for DDR3) to improve stability.
It should only be the 4-core i7 parts that cannot use all four DIMM slots.
All of the SO-DIMM modules are at 1.2V. This is typical for laptop memory. The high performance desktop RAM you see out there with high speeds and/or low latency timings use higher voltages, usually 1.35V, but some are even more. The memory should be able to be overclocked, and you can safely bump up the voltage to around 1.5V (JADEC standard for DDR3) to improve stability.
