SiS655TX has a feature that fits very well its low price: the chipset allows to apply the dual-channel mode not only to two/four identical DIMMs (as is the case with other dual-channel solutions including those by Intel and VIA), but also to unsymmetrical pairs, and even to three modules. Thus, SiS655TX-based boards keep their advantage over single-channel chipsets in terms of performance, but provide users with more flexibility and save them the trouble of choosing an operable pair of DIMMs for the dual-channel mode



Link: Digit-Life