I just upped the memory on my Inspiron 1520 laptop to 4 GB. I bought 667 MHz. Setup indicates 533 MHz.sudo lshw -short -C memory and dmidecode --type 17 | grep -i speed both indicate 667. Why the difference between what setup reports and what the command line indicates?
Is there anything that needs to be tweaked?
That system was sold with CPUs that do support the 667 MHz bus, which is why the RAM spec is 667.
Your CPU is 533 MHz - and as noted before, the memory controller is aboard the CPU, not the mainboard -- which is why you're seeing 533 MHz.