Model A1419 / Late 2013 / 3.2 & 3.4 GHz Core i5 or 3.5 GHz Core i7 Processor, ID iMac14,2

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Memory voltage for new Haswell iMacs?


Please, can somebody tell what is the correct memory voltage in new Haswell iMacs? 1.5v or 1.35v?

Thank you very much.

Best regards,


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From OWC

Product Specs:

Technology: DDR3L SO-DIMM

Density: 8GB (8192MB)

RoHS: Yes

Pin Count: 204-pin

Op. Temp.: 0C to +85C

Data Rate: DDR3L-1600

Speed: PC3-12800

CL: 11

Cycle Time: 1.875ns

Voltage: 1.35V


Module Ranks: Dual Rank

Register: Non Parity

Low Noise 8-Layer PCB

Meets and/or Exceeds Apple/Intel Specifications

Fully Compliant with JEDEC specifications

RoHS Certified

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The Haswell iMacs support both "normal" 1.5 V DDR3 and "low voltage" 1.35 V DDR3L SODIMMs. In order to operate at the lower voltage level (which consumes less power and generates less heat), you must use all DDR3L modules, otherwise they will operate at 1.5 V since the memory bus can only be driven at a single voltage.

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Does this new iMac support the normal DDR3-type RAM and is it possible to combine the two?

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jjgonche will be eternally grateful.
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