I have an old socket 775 motherboard, currently running DDR2-667 PC3-5400 chips.
I want to rip them out and replace them with 2x2GB PC2-5300 blocks, but the manufacturer's QVL for memory does not note these as "compatible".
Will I run into any issues regarding the chips?
12 Answers
No you probably can't.
While both PC2 and PC3 memory uses a 240-pin connector, they are keyed differently so they'll only fit in board designed specifically for their type. The notch in the memory chip connector edge will prevent you from connecting the incorrect memory.
If your old board supports PC2, PC2 is all you'll be able to put in it.
Most probably - no, memory is freely (to some extent) exchangeable.
Just note: there can be some special pre-reqs for memory (non-standard Volts for memory, only some allowed timings), which you must follow
2
