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To use DDR3 memory, your system must have both a 204-pin SODIMM slot and a chipset that supports DDR3 memory. A DDR3 SODIMM will not fit into DDR2 or DDR memory sockets.
SODIMMs are smaller and thinner than regular DIMMs, and the 204-pin SODIMM PCBs are always ~2.6 inches long and are usually around 1.18 inches high (though the heights can vary slightly). They consist of a number of memory components (usually black) that are attached to a printed circuit board (usually green). The number of memory components on a 204-pin SODIMM's printed circuit board (PCB) can vary, but the PCB will always have 102 pins on the front and the back both, for a total of 204 pins. The gold pins on the bottom of the SODIMM provide the connection between the memory module and the memory socket.
Reviewed by 37 customers
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Comments about Crucial 4GB kit (2GBx2) Upgrade for a Apple iMac 2.7GHz Intel Quad-Core i5 (27-inch - DDR3) Mid 2011 System:
The reason I keep using (and recommending) Crucial is it just works, no fuss, no price issues, no quality issues just the right products, fast and accurate service and a thoroughly professional experience
Comments about Crucial 4GB kit (2GBx2) Upgrade for a Apple iMac 2.7GHz Intel Quad-Core i5 (27-inch - DDR3) Mid 2011 System:
Memory was easy to fit and no problems.
Comments about Crucial 4GB kit (2GBx2) Upgrade for a Apple iMac 2.7GHz Intel Quad-Core i5 (27-inch - DDR3) Mid 2011 System:
The website was easy to follow - I found my mac and the compatible harddrive I needed. Ordered product, delivered quickly in perfect condition. Followed easy YouTube video to install. Great!
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Comments about Crucial 4GB kit (2GBx2) Upgrade for a Apple iMac 2.7GHz Intel Quad-Core i5 (27-inch - DDR3) Mid 2011 System:
Exact product for my iMac
It works
Pros
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Comments about Crucial 4GB kit (2GBx2) Upgrade for a Apple iMac 2.7GHz Intel Quad-Core i5 (27-inch - DDR3) Mid 2011 System:
My Mac was feeling it,'s age with it's original rotating disc hard drive and even though
I bought a smaller storage SSD it's faster handling all my files.
'
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Comments about Crucial 4GB kit (2GBx2) Upgrade for a Apple iMac 2.7GHz Intel Quad-Core i5 (27-inch - DDR3) Mid 2011 System:
Upgraded my 4-year-old iMac from 4 to 8GB. Worked first time; excellent product.
Comments about Crucial 4GB kit (2GBx2) Upgrade for a Apple iMac 2.7GHz Intel Quad-Core i5 (27-inch - DDR3) Mid 2011 System:
Assistance professional and serious. Service fast.
I installed RAM into my iMac (middle 2011) and it was just ready to work with a best performance.
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Comments about Crucial 4GB kit (2GBx2) Upgrade for a Apple iMac 2.7GHz Intel Quad-Core i5 (27-inch - DDR3) Mid 2011 System:
My mini slowed right down after installing mountain loin. After upgrading the memory it is back working like new.
Comments about Crucial 4GB kit (2GBx2) Upgrade for a Apple iMac 2.7GHz Intel Quad-Core i5 (27-inch - DDR3) Mid 2011 System:
My imac, mid-2011, 27 inch, 2.7ghz, was starting to slow. I bought this memory, found a video on you tube and installed the additional memory in less than 10 minutes. Now i no longer have delays in my imac performance and i have doubled the memort to 8gb.
Comments about Crucial 4GB kit (2GBx2) Upgrade for a Apple iMac 2.7GHz Intel Quad-Core i5 (27-inch - DDR3) Mid 2011 System:
For £20 delivered, I upgraded my iMac from 4gb ram to 8gm. I'd call that a very good deal!
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