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Lesson 07 - Overclocking the RAM and lowering the RAM's timings


In this lesson we will show how to find your memories fastest stable speed.  Since the memory multiplier is unlocked on both Black Edition and non Black Edition CPUs the process for finding your memories highest stable frequency is the same for both.  We will also show a different way to improve your RAM's performance by instead lowering it's timing settings.

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Setting up the BIOS for Testing

We're back in the BIOS and we're going to set it back to the default profile we made in Lesson 3.  We have our memory set to 1600MHz because it is rated to run at 1600MHz.  If we go to change the multiplier it's current setting of 8X is the highest available.  In order to find our memories maximum stable speed we are going to have to leave it set at 8x and use reference clock increases to raise the memory frequency.  200MHz on the reference clock times the memory multiplier of 8 gives use the current RAM speed of 1600MHz.  

The memory probably won't be stable at anything above 1900MHz regardless of how much we increase the voltage to the RAM.  1900 divided by the memory multiplier of 8 gives us a maximum reference clock speed of 237.  I'll set the reference clock to 237MHz and I'll need to lower the multipliers for the CPU, CPU Northbridge and HT Link so that with this reference clock frequency they will be at or below their stock speeds.  This will ensure that we are only stressing the RAM and that overclocking it will be the only cause of instability. 

If you have 1333MHz RAM it may work at up 1600MHz. You never know unless you try.  You need to stick with the 6.66 multiplier.  A reference frequency of 200MHz times the multiplier of 6.66 give you 1333MHz.  1600 divided by 6.66 is 240 so you would set your reference clock to 240MHz and then lower the CPU, CPU Northbridge and HT Link multipliers so they are at or below their stock settings.  I actually have 1600MHz rated RAM so I'll set the speed back to 237 and set the multipliers again.  We'll scroll down here and check the RAM voltage.  My RAM's stock voltage is 1.5V and that is fairly standard.  My RAM can run at up to 1.8V, also fairly standard.  You'll want to check your RAM's rated voltage range, start at the stock voltage and make sure you don't go over it's maximum rated voltage to keep from damaging the RAM. I'll set the reference frequency back to 200MHz, hit esc and F11 to save these settings in a new profile.  I'll call it RAM OC settings. 

Overclocking the RAM

If you have watched all of the previous lessons and especially if you have already done some overclocking following these videos this procedure will be like second nature to you by now.  We need to increase the frequency of the memory by about 50MHz at a time.  For my 1600MHz rated memory I'll divide 50 by the memory multiplier of 8 and I get 6.25. If I increase the reference clock by 6MHz that gives us a RAM frequency increase of 48MHz.  If you have 1333MHz rated memory you would divide 50 by the memory multiplier of 6.66 which give you 7.5 and if you increase your reference clock speed by 7MHz you will get a RAM frequency increase of 47MHz.  

Our reference clock is set to 206MHz giving us a 1648MHz memory speed. We would then hit F10 and save, go into Windows and run Prime95 on the Blend setting for at least 20 minutes and or the memory test in BurnInTest.  If the system remains stableTo watch all of our complete video lessons with full written instructions you will need to purchase a login for the site. Buy Now..

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