Just food for thought, you can always build it with 2*2g ram get it running and if there is a need for it stick the single stick in, which I still feel is a bad idea. Then if it runs fine you're good to go and if there are issues you know it's being cause by the single stick that was added. Best bet is going with the 2*4g matching sets I posted second, if the buyer doesn't have an issue paying an extra $45.00 or so for the build. Since you will not be overclocking, you also do not need the aftermarket heatsink, you can just use the stock heatsink and taking the CM Evo out of the build will offset the cost of the extra ram for the most part.