Memory Timings- a good RAM match?

[schu81]

Here is what I am looking at:

DIMM1 & DIMM 2- Samsung M3 91T6453FG0-CD5 DDR2-533 (@266 5.0-4-4-11 / @266 4.0-4-4-11 / @200 3.0-3-3-8)

DIMM3 & DIMM4- Kingston DDR2-533 (@266 5.0-4-4-12 / @266 4.0-4-4-12 / @266 3.0-3-3-9)

It would seem these 4 sticks should work well together (and they do!), but I wondering if the difference in the numbers (for example 5.0-4-4-11 vs 5.0-4-4-12) would influence performance in any way?

If you are feeling REALLY generous, perhaps a quick explanation of what those numbers in parenthesis are, I would be very grateful!

 

[schu81]

bump

 

[efd753]

i dont think so, i bought some 4 cas ram and pair it with my 3 cas and it work the faster card with down it self to the slower card.