In a previously published review here the memory modules work in exchange with the original memory with 32 GB at 1600 MHz.
After installation in my computer but above all the memory is only at 1333 MHz instead of 1600 MHz addressed.
I believe it is up to the power supply with the original 1:35 Volt memory of Apple with which these devices can not cope and to 1333 MHz "switch back", what then of course also slows down the original memory.
Clearly there is a 1.5 volt bolt but the descriptions imply a total full functionality in Mac even when upgrading.
+: The usual fast and good delivery and packaging from Amazon
+: The memory works (at 1333 MHz)
- The product description is insufficient
- The memory is displayed via Amazon Search iMac in 2012 as compatible with iMac, but it is only partially
The few stars so do not come from the product itself, but its description here.
My Opinion:
Not suitable for upgrade in original 1:35 volt memory as a complete replacement loudly review already.
But then runs the entire memory with 1.5 volts instead of 1:35 (according to Internet about 2-3 watts consumption)