Any harm in seeing if 2 identical sets of RAM work together?

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cwburns32

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Jul 30, 2014
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I know it is frowned upon because it can cause system instability issues but was wondering if there is any true harming in seeing if the PC even posts?

I did a search and found two threads and got mixed reviews.

I have (2 x 4GB) Corsair Vengeance Pro PC3-15000 1866 9-10-9-27 DDR3 kit

I have (2 x 4GB) Patriot Viper 3 PC3-15000 1866 9-10-9-27 DDR3 kit

Stock speeds and latency identical so I figured it can't hurt to try.
 
Solution
Dogsnake
Select one set of memory and install it. Download and use CPU-Z (http://www.cpuid.com/softwares/cpu-z.html). Under the SPD tab you will find the profiles for the installed memory. In the MB Bios find the section that lets you pick a memory profile ( like the XMP or JEDEC). Select the one you want. Now the bios section for memory timings should be showing the first, second and third sets of parameters set by the profile. Write them down (check the voltage as well) and shut the system down to install the second memory set. Now you can use those recorded settings by selecting them manually. Boom Shakalcka Boom you have set both sets to the same value.
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Dogsnake

Dogsnake

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Can't hurt in that it will not break anything but may not post. That said I suggest you set the memory parameters in the bios by hand. There are 8 or more settings in addition to the first 4 that are always listed. Also be sure to set the voltage to the recommended value. If you post and boot to Windows then run memtest and you might also run Prime 95 Blend (with lots of memory) just to be sure all is good.
 
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cwburns32

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Where can I find what to set those other 8 settings to at?



I was thinking 10-11-10-30 or something in that ballpark
 
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Tradesman1

Tradesman1

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Would try a manual setup of 9-10-9-28 initially, CR at 2T, DRAM voltage at 1.56 if on Haswell, If AMD (with a FX CPU (8320 or better, I'd start with maybe the timings you through up, keep the CR at 2T or 2N and DRAM voltage about the same (1.56 or so) - if problems, add the CPU and mobo
 
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cwburns32

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Can't think of Mobo off top of my head but CPU is an A8-6660k Richland, have it overclocked to 4.3. In reality probably don't need to have the 16GB but just want to see if it'll work just for fun. With that CPU what timings would you suggest then... the set you suggested or the one I did earlier?
 
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Dogsnake

Dogsnake

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Select one set of memory and install it. Download and use CPU-Z (http://www.cpuid.com/softwares/cpu-z.html). Under the SPD tab you will find the profiles for the installed memory. In the MB Bios find the section that lets you pick a memory profile ( like the XMP or JEDEC). Select the one you want. Now the bios section for memory timings should be showing the first, second and third sets of parameters set by the profile. Write them down (check the voltage as well) and shut the system down to install the second memory set. Now you can use those recorded settings by selecting them manually. Boom Shakalcka Boom you have set both sets to the same value.
 
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Solution
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cwburns32

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Both sets in set at 9-10-9-27-2T 1866, did not fuss with DRAM voltage and it appears to be running at correct speeds and settings. I should probably run it through some memory tests, correct?

Also have the A8-6600k running at 4.5 GHz at 1.4v.
 
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