Is it possible to mix RAM size????

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So i fucked up and bought 2x 8gb sticks

but turns out I have 2x 4gb sticks in my imac

Can i mix the two to make 24gb?

My motherboard can support 8gb per slot and up to 32gb total
 
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What are the timings?
 

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What are the timings?
honestly I have no idea what that even means (this is my first pc lol) , but both are ddr3 and 1600

Heres the specific ram i bought http://www.amazon.com/gp/product/B008LTBLLY

and these are my specs

Display
  • 27-inch (diagonal) LED-backlit display with IPS technology; 2560-by-1440 resolution with support for millions of colors
Processor
  • 3.2GHz
    3.2GHz quad-core Intel Core i5 processor (Turbo Boost up to 3.6GHz) with 6MB L3 cache.
Memory
  • 8GB (two 4GB) of 1600MHz DDR3 memory; four user-accessible SO-DIMM slots
    Configurable to 16GB or 32GB.
Storage1
  • 1TB (7200-rpm) hard drive
    Configurable to 3TB hard drive, 1TB or 3TB Fusion Drive, or 256GB, 512GB, or 1TB of flash storage.
Graphics
  • 3.2GHz
    NVIDIA GeForce GT 755M graphics processor with 1GB of GDDR5 memory
 
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Per the Amazon description:

CT8G3S160BM is a single 8GB DDR3L (DDR3 low voltage) 1.35V Notebook module that operates at speeds up to 1600 MT/s and has a CL11 latency. (See: link)

This will need to match your set of 2x4's.
 
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Per the Amazon description:

CT8G3S160BM is a single 8GB DDR3L (DDR3 low voltage) 1.35V Notebook module that operates at speeds up to 1600 MT/s and has a CL11 latency. (See: link)

This will need to match your set of 2x4's.
Thanks for this, really helped me understand wtf is going on lol

Will check my original ram now.

Edit: seem to be c11 as well, and PC3-12800. so hoping for the best
 

Ryuzaki

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I know on macs you can mix everything. Then the system can tell you to change the order of the sticks so you get the most out of it.