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PNY Optima 4GB 204-Pin DDR3 SO-DIMM DDR3 1066 (PC3 8500) Laptop Memory Model MN4096SD3-1066
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  • Owned For: less than 1 day

1 out of 5 eggs Fails memory test on MacBook Pro 2.53GHz i5 07/27/2012

This review is from: PNY Optima 4GB 204-Pin DDR3 SO-DIMM DDR3 1066 (PC3 8500) Laptop Memory Model MN4096SD3-1066

Pros: Price

Cons: Can't run both new sticks because it fails the memory test on startup. You can put in one new stick with a previous stick and it will boot, but that's not the solution I'm looking for. Did some research: This is down to a limitation in some memory controllers and how they handle memory sticks with different memory characteristics (also add into the fact that you have no control over these settings in EFI as you might have in a non-EFI BIOS)

When you put both new sticks in, the memory controller is trying to set up the memory according to the specs advised by the PNY SODIMMs, however it is having problems with that configuration and fails to initialise the memory.

When you put in a stick of the older RAM, it changes the configuration to use the slower RAM's settings and the second stick of RAM is actually running at the slower speeds and timings of the old RAM and these are invariably "slower" and more conservative than those the PNY sticks can run at.

So, these will be going b

Other Thoughts: It would be nice if the product description listed compatible hardware.

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Michael M.'s Profile

Display Name: Michael M.

Date Joined: 06/04/09

  • Reviews: 1
  • Helpfulness: 0
  • First Review: 07/27/12
  • Last Review: 07/27/12
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