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Mix and match RAM kits

My PC currently has the following kit of RAM

1 x G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Desktop Memory Model F3-10666CL7D-4GBRH

which is running on a GIGABYTE GA-P55A-UD3 LGA 1156 motherboard.

I just bought the following kit of RAM

G.SKILL Ripjaws Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Desktop Memory Model F3-10666CL9D-8GBR ($54 on Newegg!!)

Now, can I just add on to the RAM I already have in my system or do I need to take out the 4GB kit and just use the 8GB kit? Thank you!
5 answers Last reply Best Answer
More about match kits
  1. I believe you can add those two. Just remember that the RAM speeds (1333MHz) must be the same
  2. Thanks for your response.

    I have not overclocked or changed the settings on my original RAM kit so it should be at 1333MHz right?
  3. Best answer
    yes, this should answer your questions even though it is old: http://www.pcworld.com/article/110401/frequently_asked_questions_ram_upgrades.html
  4. Thanks, I must have googled the same thing you did because I saw that article too. I just wanted make sure I understood what I read there. Thanks for your help.
  5. Best answer selected by ccursed.
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