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My motherboard has four slots for RAM. Three of these contain identical StarRam 1Gb DDR2 667Mhz sticks, and the fourth had been unoccupied. I decided to buy a fourth stick for this slot, and since StarRam seems to have gone out of business I went for a Crucial 1Gb DDR2 667Mhz stick instead. I assumed this would be close enough, but since installing the new stick my computer boots and runs very slowly. The motherboard specs says it supports dual channel memory (the slots are colour-coded) and can handle up to 8Gb. There are options in the BIOS for changing the frequency and voltage of the memory, but I'm not sure what to change. Is there a way to make the new stick of RAM work with the existing memory?
3Just a thought, but run a couple passes of memtest86 against your machine. Perhaps your new memory is bad? – Zoredache – 2013-04-18T19:31:42.877
3remove the new stick of ram and use the machine. Then try removing one of the other 3, replacing it with the new one, then use it. This way you can test whether it is the increased capacity, or the RAM module itself which is (or isn't) causing an issue. Also: are you using a 32 bit OS or a 64 bit OS? – horatio – 2013-04-18T19:46:30.627