Hello everybody, I have an issue: recently purchased these RAM's: http://www.crucial.com/usa/en/ct51264bf160bj , and learned that they are incompatible with my laptop. So the question is which RAM's should be? If I done my research right, should these be fine: https://www.amazon.com/ADATA-1333MHz-DDR3-SODIMM-1-5V/dp/B00DOJNN0S or http://www.maplin.co.uk/p/integral-4gb-ddr3-1333mhz-cl9-desktop-memory-a40kr ? Just asking you guys, I want to be sure before I spend my money for no good again.
Emachines E732ZG Ram upgrade
- Thread starter EasyCake
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Solution
voltoid27
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- Sep 17, 2014
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Both of the sticks you linked will work fine. The reason the Crucial RAM didn't work is that it runs at 1.35V which is the standard for newer laptop RAM, while your CPU needs 1.5V to function properly as it's an older model. For best performance try to get 2 4GB sticks of DDR3-1600 CL9 because of the low latency.
voltoid27
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Assuming both of the RAM sticks are the same size, the issue is most likely that the module with 4 chips per side has a higher density than the one with 8 chips, so the CPU's memory controller doesn't know how to address it all. You'll either want to try updating your BIOS in an attempt to get it to recognize the higher density RAM, or returning the RAM if that doesn't help.
voltoid27
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It makes sense that those would work though; the 2GB stick with 4 chips per side (8 total) has a density of 256MB per chip, while the one with 8 chips per side (16 total) has a density of 128MB per chip, also ok. When you move up to 4GB, the density of the 16-chip stick goes up to 256MB/chip (still ok) but the 8-chip stick has a density of 512MB/chip, which is too high for your memory controller. So ultimately each chip cannot hold more than 256MB, or the stick won't work.
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