In my ajp 480d (Pentium 4 circa 2003) laptop, after a memory failure (i.e the computer would not go through POST) I changed 2X 512Mb DDR SDRAM SODIMM 2.5v PC2700 for a new pair of memory cards. I.e. no change to the configuration.
If I am not very careful i.e. leave lots of room under the PC, take care not to run too many programs intensely, it shuts down without warning. By that I mean the computer powers off instantly, not that Windows/Linux crashes. I have carefully cleaned all the airways in the portable and can confirm that both the memory fan and the cpu fan are operational. The memory is crammed into a small hole with a tiny fan, which is speed controlled, directly on top of the memory.
If I am really careful (lots of space under the pc, stop working when I hear the fans), I can keep it going for hours.
I suspect the problem is that the memory is too hot. I can hear the memory fan running at max speed immediately prior to the shut down. I am fairly sure that the problem is not cpu temperature since the cpu fan is not normally running at max when the shut-down occurs.
So, on to my question: would installing faster memory (PC3200) without changing anything else reduce the power dissipation in the memory? i.e. still running it at the existing clock speed. What I am really asking is does memory have similar characteristics to processors in that de-rating reduces dissipation?
Note that I have no facility that I can find in the bios to fiddle with voltages, clock speeds etc.