All 3 of my RAM modules are Patriot Extreme. The two 512's are DDR 600, the 1GB is DDR400 2-3-2-5. I have tried every latency option there is. What happens is, the motherboard(on various boards/chipsets) will detect one 512, both 512's together, and it will detect the 1GB module by itself. But when I mix the 1GB module with either one or both of the 512's(or a 256 for that matter), the 1GB isn't even registered as being in the board in BIOS or in windows. For example, if I have the 1GB stick in DIMM 1, and a 512 in DIMM 2 and 3, it will say in the BIOS and Windows that there is 1GB of RAM as 512x2, but doesn't even show the other gig. This is happen on the socket 754 platform with both NForce3 and VIA K8 chipsets. I would be grateful for any input or advice. Thanks in advance.
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10/2/06 at 3:42pm