Double rate and single rate memory?

[anthonyaudi]

Hello I have a question

I have a HP XW 8200 machine

this machine can hold up to 16gb of memory

For some reason or other I can only get the first 2 slots of memory to work anything I put in the 3rd slot I get a memory error problem.

Now I have 2 questions

As I am 99.9% sure that the 3rd slot is defective (because if I skip the third slot and put memory in the fourth i get no memory error beep but the machine does not detect the memory i put it in) (also if i put the original 2 gb ((4 sticks of 512mb)) in the machine it only detects 1gb total so i am assuming that the 3rd memory slot is broken)

What is the difference between Double rate and single rate memory

I have 2x 4gb kingston ram

2x 2gb (one kingston and one Smart)

and 2x 1gb samsung ram

is it possible that these rams are not compatible with each other in this machine.

[anthonyaudi]

nevermind im retarded

ddr=double data rate

sdr=single data rate

sometimes when you work too much you forget to think