For crunching purposes there's very little, if anything, between single and triple channel RAM performance. I'd imagine the same would apply to triple channel as well. Just make sure you have ENOUGH so that that your system doesn't need to access the swap file/partition regularly because that WILL hurt crunching performance. I like to run about 1GB per core, but others find 512KB per core works fine as well. (most of my machines are also full desktop machines as well)