Kingston ValueRAM 2x512MB cannot do dual-channel on my computer. Because the ValueRam line is OEM, it's basically a crapshoot in terms of whether it will work well or not. Kingston's Tech Support denies this and claimed that Prime 95 and memtest are unreliable, which shows their ignorance on system stability. However, the HyperX has been worked well with my nforce2, so Kingston's at least got decent quality with their HyperX modules. But again, their ValueRAM products aren't that good.