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Vista - DDR RAM Explained

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Old 02-23-2009   #11 (permalink)


Vista Home Premium x64
 
 

Re: DDR RAM Explained

Quote  Quote: Originally Posted by RikoSuave View Post
Question Skunk?

I've tweaked my evga board to match my OCZ 1006 memory specs at 5-6-6-18 2T 2.1V with the "expert" setting. When I switch it to the "optimal" setting it switches the cycle to 5-8-8-24.

If lower #'s are tighter why doesn't "optimal" setting adjust to lower cycle #'s?
because the bios has set the ram timings at a safe operating environment, looser timings set by default usually means that your CPU is running 1:1 with your ram, your CPU is slowing the timings down to get a faster speed. if you want tighter timings on your ram, you could increase your CPU clock frequency to reflect this so effectively your running 1:1 even at higher clock speeds, theres more in common with your cpu and ram than you might think.
I found this out the hard way, my windows experience index was telling me my ram was slow (5.5) and my CPU was fast (5.9), i overclocked my CPU to 2.8Ghz and my ram was released to do its dirty deeds and bumped up the ram to 5.9, it confused me at first but i realised that my CPU was slowing my RAM down, running it in 1:1, like a Dam holding the water back, as soon as i removed the barrier, i was overwhelmed with how much performance was gained.
pics are before and after ive since overclocked my CPU to 3Ghz

Attached Thumbnails
wei..jpg   wei.jpg  

Last edited by MrNeeds; 02-23-2009 at 07:17 AM..
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Old 02-23-2009   #12 (permalink)


Vista Premium 64
 
 

Re: DDR RAM Explained

Thanks for the explanation!

Cheers,

Riko
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Old 05-11-2009   #13 (permalink)


Vista Ultimate 32bit
 
 

Re: DDR RAM Explained

My DDR2 800 RAM (dual ch)is running under 1200Hz. However, i cant see big improvement over 800Hz. (constant timing) .
Should there be less apps that are FSB bound.
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Old 05-11-2009   #14 (permalink)


ultimate 64 SP1
 
 

Re: DDR RAM Explained

the only way you'll notice a difference above 800mhz with DDR2 is while ''number crunching'' , tighter timings & a lower frequency can often deliver the same or better performance......

obviously DDR3 is different


& i dont undertsnd what you mean by ''apps are FSB bound'' ??




SK
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Old 05-11-2009   #15 (permalink)


Vista Ultimate 32bit
 
 

Re: DDR RAM Explained

yes. ddr3 makes a huge difference.

Many apps im using tend to have overwhelming computation tasks other than memory bus thirsty. These apps are not FSB bound (aka. performance limited by FSB).

Dex
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