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Do RAM timings make a significant difference?

post #1 of 12
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I know in the grand scheme of things, RAM timing USUALLY means very little. There's a few benchmarks that improve drastically with tighter timings and some real world applications will as well ... but I know they're few.

But I'm getting almost 750PPD more by running 4-4-4-12 over 5-5-5-12 ... any one else noticing increases like this?
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post #2 of 12
when you consider that its over 24hours not 30 minutes i guess ram timings would make a difference. just like while increasing cpu speed by 100mhz doesnt increase gaming performance much it would over the long term show benefit.

however i would have thought that a higher ram speed would have a greater increase in performance than timings on an intel system.
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post #3 of 12
I notice very little. Comparing it to 100mhz bump is about right. I get 1/3 of GFlop more with tightest timings.
 
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post #4 of 12
I was wondering the same thing earlier and found this thread, hopefully it will help you too!
 
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post #5 of 12
It can make small differences for SMP WUs (usually better timings give the same increase in PPD as higher speeds would).

For -bigadv/-hugeadv, it's a more significant increase, and faster RAM is more important than the timings.
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post #6 of 12
I would say that since a timing is something that happens per clock, having both high speed and tighter timings would be beneficial for folding.
post #7 of 12
Doesn't seems to end up that way though... not with the -hugeadv-ers on 2600ks.
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post #8 of 12
Not directly answering, but I clicked this in the news section the same time as your thread
post #9 of 12
So, the speed of the RAM makes a larger difference. However, having more RAM 8GB vs 4GB), doesn't, and tighter timings, also do not have a large effect?

I think F@H needs to get on this an optimize the client for utilizing EVERYTHING!

moar powa!

(I literally have no idea how RAM functions with programs, and I'm sure what I just suggested is quite impossible, but whatever)
 
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post #10 of 12
It's the speed of the RAM not the timings.

My first ram = 1600 RAM CL8 = 6903 WU = 56~59 mins TPF
Ugpraded to = 2133 RAM CL9 = 6903 WU = 46~47 mins TPF
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