Is there a noticeable difference between 5-4-4-12 and 5-5-5-18?

[Texas-Hansen]

I'm curious whether there is actually a noticeable difference between DDR2 800 (PC6400) 8 gb that has timings of 5-4-4-12 versus timings of 5-5-5-18? Or, do these small variations in timing get lost given the amount of RAM (8gb)?

(Running Vista 64 bit on Q6700 2.66 ghz processsor)

Thanks

 

[lan71]

I didn't notice much difference between my Vista32 running 3 gig of cas5 mem and my Vista64 running 8 gig of cas4 memory. But I am using one as a glorified Tivo and the other to run Vmm's, so major differences in what they are setup to do. The vista32 is using a extra E6700 chip I had laying around, and was using a Q9450 for the vista64.

http://en.wikipedia.org/wiki/CAS_Latency
That may answer your question better than I did.

 

[randomizer]

If you don't intend to overclock you probably have a good chance at being able to run at least some of the tighter timings anyway. But you may need to bump up your MCH voltage slightly with that much RAM.