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OC'ed my memory without knowing!!

post #1 of 5
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I don't even know how to OC my memory, but as I OC my CPU, the memory went up too. I'm running 133 (3/5) divider @ 2.5-3-3-5 1T with 336 FSB, then it showed as DDR433 in Everest, as opposed to DDR429 @ 334 FSB. Just wondering, in which way does it affect the memory?
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Powder Keg
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post #2 of 5
Yeah, you OC your memory by upping FSB.

As with a CPU, too high a clock will cause instability. Usually, simply upping the CAS Latency timing (first timing) from 2 to 2.5 (or 3 for a higher clock) can clear any instability, as well as maybe increasing voltage to 2.7V or 2.8V. You may need to play with the other 3 timings (RAS to CAS delay; RAS Precharge; TRAS).

And, as with a CPU, a higher clock increases performace (in this case, greater bandwidth), and a stability test is needed. Memtest 86+ is the best. There should be an option in your BIOS to enable it at boot-up, as all/most DFI board have Memtest pre-installed.
post #3 of 5
Quote:
Originally Posted by thealmightyone View Post
And, as with a CPU, a higher clock increases performace (in this case, greater bandwidth), and a stability test is needed. Memtest 86+ is the best. There should be an option in your BIOS to enable it at boot-up, as all/most DFI board have Memtest pre-installed.
Yeah, but just to mention;

We must remember that Higher RAM freq doesnt always add up to better performance, and sometimes overclocking RAM creates a need to increase the latency as you said (which of course, we dont want) so it might be a good idea to Benchmark the system as stock sppeds (with the lowest RAM latencies you can achieve) and compare the results to your overclocked configuration...

Just a thought
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post #4 of 5
I just OC'd my ram also. Decided to go for DDR500. Right now Im at a 108mhz OC on it. Stock timings (forced) of 3-3-3-8.

Ran a bench with Everest, and it showed a rather impressive performance increase
    
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post #5 of 5
Just because you have to increase one or two timings to make your overclock stable doesnt mean you're taking a step back. DDR2 has looser timings with its higher clocks, but that isn't stopping DDR2 from becoming mainstream, and DDR from packing up to retire.

Use this guide. You end up making a small table, and you can see at a glance if/where you are increasing timings dramatically or increasing voltage for a small clock increase.
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