I had heard that either slower or faster memory could be used in a system.
my computer is rated only for PC2-5300, would like to use PC2-4200, or PC2-6400, which would be safest? dell says it can only use pc2-5300.
Dell uses proprietary components. If they say it can only use PC2-5300 then that is all they have programmed the BIOS to recognize and utilize so unless you pay somebody to program a hacked bios specifically for your system, that's all you can use.
Dell uses proprietary components. If they say it can only use PC2-5300 then that is all they have programmed the BIOS to recognize and utilize so unless you pay somebody to program a hacked bios specifically for your system, that's all you can use.
Ok, to be more specific, you might be able to use the faster memory but if it did work it would most likely degrade itself to the lower speed of the intended module specification. It would not be faster than the 5300 modules.