Due to one of those engineering accidents that will be funny once we get past the humiliation, we have recently been able to run a full battery of tests on a single channel Athlon 64 4000+. Since a lot of factory-made PCs these days are shipping with single 256 or 512 MB modules, we thought we’d take the opportunity to compare single-channel RAM performance with its double-channel counterpart, to finally answer the age-old question: is the second stick worth it? Let’s have a look.