Peter Cordes wrote: > Even when running at 2.2GHz (full > speed) with only one stick of RAM (1024MB OCZ), it sometimes shows a cluster > of memory errors in memtest. It doesn't seem significantly different from > with both sticks of RAM, the other being a 512MB Infineon, IIRC. All DDR400. What happens when you run with just the 512MB DIMM? The 1GB DIMM could just be defective. [Also, if you want dual-channel, you have to two identical DIMMs]