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How To Keep DRAM Frequency The Same While Increasing The BCLK Frequency?

post #1 of 8
Thread Starter 
The default BCLK Frequency is 133. I have the DRAM Frequency already set to 800MHz DD3_1600 as shown in the first screen shot below. Now, if I bump the BCLK Frequency up to 134 by pressing the "+" sign once on the keyboard, the BIOS automatically CHANGES the DRAM Frequency to 804MHz DD3_1600 for some reason (2nd screen shot).

Everytime I press another "+", it keeps bumping the DRAM Frequency up as well. Not only that, but the DRAM Frequency increments aren't nice even numbers after changing the BCLK Frequency, so there's not a way to manually put it back to exactly 800MHz DD3_1600. Is there a way to prevent this from happening? The memory I have is only rated at 1600 MHz DDR3, so that's where I wanna keep it.

Thanks.

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attachment.php?attachmentid=89505&stc=1&d=1293940348

attachment.php?attachmentid=89506&stc=1&d=1293940348

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post #2 of 8
Increasing the BLCK frequency automatically increases the RAM speed. It does this on all motherboards, there is no way around it. You need to drop the speed of your RAM to a lower setting.
    
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post #3 of 8
Thread Starter 
So this means if I want to overclock, I have to sacrifice some RAM speed? Would that just make the computer run slower again?

If remember correctly, when the BCLK Frequency is up to something like 160, then it works out to where the DRAM Frequency increments are neat again and then I can put it back to 800MHz DD3_1600 where it should be (I believe). Is this what I should do?

Thanks.
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post #4 of 8
Both RAM and CPU Frequency absolutely depend on the Base Clock. Unless you have an unlocked multiplier, upping the BCLK is all you can do to OC.

To negate this, you can only loosen the DRAM strap, which uses ratios such as 2:10, 2:8, and 2:6 to set its speed in MHz relative to the BCLK. Default is 2:10 I think, so if you lower it to 2:8, and overclock from there, you will increase your CPU speed such and such, but your RAM speed will be the same or lower until you increase the BCLK past a certain point again.

Take this for example:

BCLK= 133MHz
CPU Multiplier = 23x
RAM Strap = 2:10

Your DRAM frequency is now 667~MHz (1333MHz)
Your CPU Frequency is now 3.05~GHz

BCLK= 166MHz
CPU Multiplier = 23x
RAM Strap = 2:8

Your DRAM Frequency is now 667~MHz (1333MHz)
Your CPU Frequency is now 3.82~GHz

See what I'm getting at here?
 
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post #5 of 8
Thread Starter 
The names of the settings are tripping me up. Is the "CPU Ratio Setting" that I see on the screen the same thing as what people are calling the CPU Multiplier or the CPU Clock Multiplier? Is there also something else called the memory ratio?

I see that I'm able to change the "CPU Ratio Setting" from 12 - 24 or Auto.
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post #6 of 8
Quote:
Originally Posted by JohnnyGalaga;11858516 
The names of the settings are tripping me up. Is the "CPU Ratio Setting" that I see on the screen the same thing as what people are calling the CPU Multiplier or the CPU Clock Multiplier? Is there also something else called the memory ratio?

I see that I'm able to change the "CPU Ratio Setting" from 12 - 24 or Auto.

Yes, CPU Ratio = CPU Multiplier

I don't see DRAM ratio anywhere though.
 
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post #7 of 8
Thread Starter 
Here's the rest of the OC Tweaker screen. What does "loosen the DRAM strap" refer to? I don't understand the 2:8 ratio part.
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post #8 of 8
you can also overclock your ram. im running pc1333 ram which is 667 at close 1000 but i have some pretty good mircon ram
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