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Study: RAM Timings and their Effects
Study: RAM Timings and their Effects
Getting confused about all those numbers when going to buy your RAM? Not anymore....
Date: 24-07-07
Topic: Tutorials and Guides
Author: Karan Misra

About Author:
Software professional and gizmo tracker , keeps abreast of e-nnovations; a love that led him to create Erodov

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The Base Overclock 
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Study: RAM Timings and their Effects

Hello and welcome to my humble attempt at clearing some of the paranoia and confusion that shrouds matters such as RAM Timings, Timings vs Mhz, etc, etc.

The setup being used:

Opteron 165 "CCBWE 0551 UPMW"
DFI Ultra-D AD0 w/ 704-2bta
Transcend Samsung UCCC "Random Retail Part"
Windowns XP SP2 (w/ any tweaks)

What I will be doing?

I will start with my 24x7 OC setup and proceed from there. I will gradually CHANGE one RAM Timing (tRP, tRAS, tRRD, tRC, tRFC, tREF, etc.) and benchmark "3" timings to get a average view of how the timing affects the benchmarks.

The program being used for benchmarking is "Everest Ultimate Edition" The "Cache and Memory Benchmark" tool inside it makes it easier for me to get as many combinations tested as possible.

Version of program used: v2.80.534

How I did it?

First of all to remove as many variables from the equation, I did a "End Process Tree" on Explorer.exe. This ensured that the CPU was free of any processor intensive applications. Then I manually started the differenent programs (A64Info.exe and everest.exe in my case). I set "everest.bin"'s priority to High (realtime is detrimental to benchmarking) and then set A64Info.exe to Low.

I did this to ensure no interference from the A64Info.exe process (which runs a auto-refresh cycle every 2 seconds to update system parameters.)

Then I proceeded to set the timings one-by-one using A64Info.exe then RAN the benchmarks 6-7 times untill I got 3 "close" readings (concordant.) Those 3 benchmarks (per timing change) have been reproduced here as evidence.


Links to Software Used

Everest UE: http://www.lavalys.com/products/over...?pid=3&lang=en
A64Info: A64Info - New CPU ID and memory tweaking tool! - feedback welcome... - XtremeSystems Forums

PS: Thanks to Anish for telling me to link to the software used.


Hmm, wheres the source?

I have mentioned 2 references (DFI street, and a DDR article), but the research, benchmarking, overclock were mine. Hence no source article (thanks Justin for telling me to mention this.)


darylemmanuel and Endangered like this.

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  #1  
By Dark Star 24-07-07
Re: Study: RAM Timings and their Effects

Awesome tutorial
Last edited by KiD0M4N; 24-07-07 at 11:36 AM..
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  #2  
By Stewie 24-07-07
Re: Study: RAM Timings and their Effects

Nice read.
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  #3  
By 200mph 24-07-07
Re: Study: RAM Timings and their Effects

neatly put .
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  #4  
By Ank1t 24-07-07
Re: Study: RAM Timings and their Effects

Good info for everyone (rather long at 12 pages tho )
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  #5  
By Scorpion 24-07-07
Re: Study: RAM Timings and their Effects

Very good effort but its too long
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  #6  
By rivunited 25-07-07
Re: Study: RAM Timings and their Effects

read the full article! nice job
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  #7  
By KiD0M4N 25-07-07
Re: Study: RAM Timings and their Effects

Originally Posted by rivunited View Post
read the full article! nice job
Wah, you must be the first guy who went the full hilt

My regards.
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  #8  
By Endangered 04-01-13
Re: Study: RAM Timings and their Effects

Thanks for the detailed analysis....

Will try somtime...
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