Processor type matters…
The motherboard matters…
It doesn’t do much good to get faster ram if the mother board and processor can’t take advantage of it.
Other things matter too, such as: Do you overclock?
Different ways to bench mark RAM as well. For some things tighter timings at slower frequency clocks might be better, or vice verse.
It’s a very complicated topic, and the answers for one platform or generation of cpu and motherboard combo can be quite different for another.
Also, some processors and motherboards support different sorts of channeling modes. Is it better to have 4 16gig SIMMS in some kind of fancy quad channel mode? Or two 32gig SIMMS in dual channel, or a single 64gig SIMM in single channel…with room for future expansion in the other slots?
Might be loads of options…
There’s also the question of which is more beneficial for your needs. MORE RAM, or FASTER RAM?
If you can get 32gig simms a little slower for a similar price to faster ultra tuned OC ready 16gig simms with cool heat sinks…well, which one is better for your needs? MORE or FASTER?
I think the main thing is…if what you have is working well in daily application, don’t throw away money on it, or try too hard to push ‘bench-marks’ that you’ll probably never notice in real world usage
If you are building a brand new system from the ground up…
Personally I’d go for the fastest RAM supported by the processor and motherboard if you can find SIMMS in the ‘size’ you want and all fits the budget. If you have a way of testing it first to make sure it’ll work, or know someone who can…it might even be worth it to go a step or two faster than your motherboard/cpu states is the max (can take the RAM into newer system builds or upgrades).
If you know over-rated RAM will work in your build…You can almost always run RAM at slower speeds than the max rating, but it’s really difficult or impossible to reliably run it faster than it’s top rated speed. It also gives you a little head-room for growth and expansion. Maybe you upgrade the processor at some point that can use the faster speeds, then the RAM you already have might hold you longer for upgrades and future system builds until it’s necessary to upgrade that as well.
Before buying a motherboard, read all the fine print about RAM, and support for your processor. Look for any astrix or red print! Stuff like, “X Speed not supported with model Y processors.”
On the question of MORE. If you trigger lots of samples and stuff (big rack based sampler plugins) directly from RAM rather than D2D, then obviously you’ll want MORE RAM over SPEED if you are forced to ‘choose’.