Since the RAM upgrades through Apple are quite expensive I usually buy RAM from Crucial.com for example. But there's something I've been wondering for some time now. Let's say I was to upgrade the RAM in my Mac to 8GB. In terms of performance is it better to have fewer cards but denser (ie. 2x4GB) or more, but less dense cards (ie. 4x2GB) . I do know that denser cards are more expensive. But which option would be better not regarding the price?