Memory – Webbanshee https://webbanshee.net Your Exchange Server Blog Wed, 12 Feb 2020 19:56:03 +0000 en-US hourly 1 https://webbanshee.net/wp-content/uploads/2017/01/WB_BL_RND-150x150.png Memory – Webbanshee https://webbanshee.net 32 32 122610384 Different Memory Types https://webbanshee.net/different-memory-types/ https://webbanshee.net/different-memory-types/#respond Thu, 02 May 2019 16:05:03 +0000 https://webbanshee.net/?p=2764 Different Types of Memory seems to be somewhat a luck game. It depends on the frequency, voltage and how the different RAM sticks match with eachother ( the last point has the luck game factor )
But you can take meassures to give it the best try......read more

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For my birthday in two weeks, I decided to make myself a present and extend the memory capacity of my PC. For a long time I wanted to build a more decent test lab at home to run a DC and minimum one Exchange Server and today is the day! In the end my solution was a  combination of two different memory types.

My late 2016 PC configuration had 2x 8GB Kingston HyperX DDR4 2133 Mhz HX421C14FB2/8 RAM sticks installed. The optimal solution would have been to get 2x 16GB sticks of the same Kingston HyperX series. Unfortunately, this series has been discontinued.

I was not sure if another HyperX series would match with the installed sticks. The HyperX Predator 2x16GB 2666Mhz HX426C13PB3K2/32 caught my eye. After some further readings, I ordered these two 16GB sticks. Got them today and placed them instantly in their slots.

My thoughts were: In the worst case the 2 RAMs do not match and I stay with 32GB of the new RAM. When everything goes fine 48GB of memory will smile on me from the task manager Smiley

The composition of different memory types was as follows :

DIMM_A1: HyperX DDR4 2133 Mhz HX421C14FB2/8 ( old RAM stick )
DIMM_A2: HyperX Predator 2x16GB 2666Mhz HX426C13PB3K2/32 ( new RAM stick )
DIMM_B1: HyperX DDR4 2133 Mhz HX421C14FB2/8 ( old RAM stick )
DIMM_B2: HyperX Predator 2x16GB 2666Mhz HX426C13PB3K2/32 ( new RAM stick )

Result: The PC didn’t boot.

No problems on boot when only the new RAM or only the old RAM was installed.

Changed the sticks and the slots and set the frequency and voltage manually in BIOS:

DIMM_A1: HyperX Predator 2x16GB 2666Mhz HX426C13PB3K2/32 ( new RAM stick )
DIMM_A2: HyperX DDR4 2133 Mhz HX421C14FB2/8 ( old RAM stick )
DIMM_B1: HyperX Predator 2x16GB 2666Mhz HX426C13PB3K2/32 ( new RAM stick )
DIMM_B2: HyperX DDR4 2133 Mhz HX421C14FB2/8 ( old RAM stick )

Ram Frequency: 2133 Mhz – which is absolutely enough for my needs and the lowest frequency in the chain. The Predator sticks with 2666 Mhz will adapt the manually set values and run with 2133 Mhz and 1.2v defaults.

Voltage: 1.2v

Result:

47.9 GB of RAM visible with different memory types

… and stable for the last 24 hours stressed with several Virtual Machines.

This is what worked for me.  Most probably not every RAM and Brand combination will match when you use different memory types. Should you try it with other variations try it with the specs of the weakest part ( RAM ) entered manually in your BIOS.

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