Mixing 1333 with 10600 ram

brzonte

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Mar 24, 2014
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Hey i currently have Kingston 2x2gb 1.5V 1333mhz at dual channel with 2 free slots left. I bought Kingston 2x4gb 1.5V 10600mhz and im planning on putting them on the 2 remaining DIMM slots. Will i run into any troubles seeing as the speeds are different?

My mobo runs DDR3 1066/1333/1600*/2133* all at 1.5v

Is 1066 the same as 10600?

Thanks
 
Solution
Well, that sounds a bit better. :) 10600 is 1333, not 1066, so your base speeds are compatible. Now you have to concern with the other timing portions of the RAM being compatible.

If it were up to me, and I was intent on using both kits together, I would just install the new set, fire up the machine, and run a RAM test overnight, or at least for a few hours, and verify all of the RAM modules are returning good data and no errors. If you get errors, the machine locks up, or otherwise fails to complete the tests as expected, then I would set out to either find compatible timings between the two kits, or simply stick to the new kit, as it's much larger than you are currently running and should handle pretty much any task perfectly fine...
If you plan to run both sets of RAM modules that you have currently, run them all at 1066 MHz. If you could possibly return your new set, you should follow Rami's advice and just get a new set for the system, or at least try and get a matching set. Mixing speeds is not recommended, but it can be done. You just need to make sure all modules run at a common speed that they all support. The 1333 MHz modules will run at 1066 MHz but you can't guarantee the 1066 MHz modules will run at the 1333 MHz speed.
 

brzonte

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Well when i run CPUZ on my 2x2gb it shows PC3-10700 (667Mhz). does that mean that my 1333mhz are actually 10700? If so, then i shouldnt have any problems with these 2x4gb 10600mhz sticks?
 
CPU-Z is going to show you what speed you are currently running your RAM modules at. If it's reporting your modules as 667, that is essentially 1333, not what the new modules are supposed to be running at, so you will have to reduce the speed of the memory to 533.

DDR3-1066 does not equal PC10600.

DDR3-1333 = PC10600
DDR3-1066 = PC8500
 

brzonte

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I havent opened the new set. But the 2x4gb set says PC3-10600 on it. which means it will be PC8500? So does the motherboard automatically reduce the speed of my current 1333s? Or its something i have to do manually? Also, is it a noticeable difference if i reduce the speed?
 
Well, that sounds a bit better. :) 10600 is 1333, not 1066, so your base speeds are compatible. Now you have to concern with the other timing portions of the RAM being compatible.

If it were up to me, and I was intent on using both kits together, I would just install the new set, fire up the machine, and run a RAM test overnight, or at least for a few hours, and verify all of the RAM modules are returning good data and no errors. If you get errors, the machine locks up, or otherwise fails to complete the tests as expected, then I would set out to either find compatible timings between the two kits, or simply stick to the new kit, as it's much larger than you are currently running and should handle pretty much any task perfectly fine.

MemTest86: http://www.memtest86.com/

Memtest86+: http://www.memtest.org/

Windows Memory Diagnostic: http://windows.microsoft.com/en-us/windows7/diagnosing-memory-problems-on-your-computer

If the tests run without error, most likely you'll be fine with both kits installed and no custom timing.
 
Solution

brzonte

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Mar 24, 2014
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Will do, im currently running Windows 32bit so im not even utilizing my 4GB i have now. But will be installing windows 64bit soon and before i do that ill run memtest. Right now my configuration is 9-9-9-25. Im not sure what timings these new kids have. But on the package it says CL9 240. So im guessing this one will be 9-9-9-25 as well?
 
If you are running 32-bit Windows, I would not install the new set of RAM modules. 32-bit drivers have been known to be buggy and flat-out problematic when running with larger memory sets than what were expected when they were written. Whether the new RAM modules function fine under a memory test or not, I would be very watchful for any new problems that may occur in your system, if you do decide to install them before moving to 64-bit Windows. In the long run, there is no great advantage to having even the 4 GB of RAM in a 32-bit installation of Windows. I believe only Vista 32-bit and newer could natively take advantage of it, and the absence of a price difference between the 32 and 64 bit Windows variants makes it pointless to run 32-bit anymore.
 

brzonte

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Mar 24, 2014
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sounds good, ill reformat and install the 64bit and test the new 2x4gb ram with my existing set and see if there are any problems. If there are, ill simply use the 4gb set and sell my older set. Thanks for your help!!
 

AlexMarin

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Nov 24, 2009
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Hi, which motherboard is that?

I want to give use to my 2 modules of 8GB each DDR3 PC-8500 1066Mhz 204pin (not 240 pint) non-ecc 1.5v

Thanks
 

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