I guess – if you don't mind halving your memory bandwidth. Most laptops have two memory channels, so if both are not populated with same size memory module, at

I guess – if you don't mind halving your memory bandwidth. Most laptops have two memory channels, so if both are not populated with same size memory module, at least part of the memory range will provide only 50% bandwidth. For memory bandwidth sensitive tasks it can halve performance, although I guess for most workloads the effect is way less, perhaps just 15-20% slowdown.