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how is 9-9-9-24@1600 better than 8-8-8-24@1600

post #1 of 13
5/18/12 at 2:30am
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using the super leet pro memory benchmarking tool that is the windows performance rating system my ram got a score of 7.6 when set to 9-9-9-24@1600 and a 7.5 when set to 8-8-8-24@1600. the only explanation i can think of is address read errors were occurring any being caught at 8-8-8-24. Anyone have any ideas on this? also i need a legitimate benchmarking program for ram, taking suggestions.
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post #2 of 13
5/18/12 at 2:32am
I'm no expert when it comes to memory but I think your memory is unstable at CL8?
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post #3 of 13
5/18/12 at 2:34am
Wei is not reliable for testing anything especially ram timings

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post #4 of 13
5/18/12 at 6:22am
Aida64 or MaxMem are better synthetic benches for RAM testing though they show only theoretical gains or losses. Latency timings can influence the number of "misses" and thus the results.

It should be noted that changing of RAM latencies at frequencies of ~1333 MHz. and higher have little to no effect on real applications as one clock cycle is less in real time as the frequency increases. DDR3 RAM @ ~1333 Mhz. on a typical AMD or Intel desktop is not a bottleneck so there isn't much to be gained. Llano APUs are the exception as the GPU can use the higher frequency.

The thread below has more info.

http://www.overclock.net/t/1237178/is-o-cing-my-ram-worth-the-trouble/10#post_16866022
Edited by AMD4ME - 5/18/12 at 10:05am
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post #5 of 13
5/18/12 at 6:24am
Just roll with some SPI 32m thumb.gif
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post #6 of 13
5/18/12 at 6:35am
Quote:
Originally Posted by AMD4ME View Post

Aida64 or MaxMem are better synthetic benches for RAM testing though they show only theoretical gains or losses. Latency timings can influence the number of "misses" and thus the results.
It should be noted that changing of RAM latencies at frequencies of ~1333 MHz. and higher have little to no effect on real applications as one clock cycle is less in real time as the frequency increases. DDR3 RAM @ ~1333 Mhz. on a typical AMD or Intel desktop is not a bottleneck so there isn't much to be gained. llano APUs are the exception as the GPU can use the higher frequency.
The thread below has more info.
http://www.overclock.net/t/1237178/is-o-cing-my-ram-worth-the-trouble/10#post_16866022
I thought Bulldozers lost 2-4% performance when below 1866Mhz.
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post #7 of 13
5/18/12 at 6:41am
Quote:
Originally Posted by james_rich View Post

I thought Bulldozers lost 2-4% performance when below 1866Mhz.

It really depends on the application. Most people can't see such small changes in real applications so it's a moot point if you can't see it or feel it when you actually run programs.
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post #8 of 13
5/18/12 at 6:44am
Quote:
Originally Posted by james_rich View Post

I thought Bulldozers lost 2-4% performance when below 1866Mhz.
Only discussions I remember were about Llano. Most people run 1866MHz+ with Bulldozer since it comes with native 1866MHz memory support. Tho Llano's iGPU is known to bottleneck when using slow memory.
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post #9 of 13
5/18/12 at 8:16am
  • xd_1771
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It's not.... WEI is not a proper benchmark for these kinds of comparisons.

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post #10 of 13
5/18/12 at 8:18am

It isn't. WEI is useless, don't base your machine performance off of it. If you really want to test whether cl8 or cl9 is faster you should fold your machine for the Chimp Challenge.

 

http://www.overclock.net/t/1249467/official-chimp-challenge-2012-signup-thread/0_40

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