unable to add ram to my elite desk pc

[Charlie_Balogh]

My Elite Desk has 4G of RAM.  I wanted to add 4G more.  I installed 1 stick (1x4G) of RAM but Windows did not recognize it.  The BIOS prompted me that there was a RAM change.  I used CPU-Z to look at the RAM and it showed both 4G (DDR-4) sticks in the proper slots.   I looked under System Properties and in Task Manager/Performance.

The RAM was in slots 1 and 3.  I tried the new RAM in slot 1 and it worked.  Neither RAM stick worked, alone, in any other slot. 

I am perplexed to say the least.  I hope someone can shed some light on this.

Other details:  The RAM was from 2 different manufacturers, both manufacturered in 2017.  The speeds of both were not the same.  The  original was 2132 Mhz and the new was 2400 Mhz.  I understand from the documentation that this is ok but the system will adjust to the lower speed.

[old_geekster]

@Charlie_Balogh , welcome back to the forum.

What is the full model of the computer? I need this information to review the specifications of it. Please don't furnish the Serial # or other personal information.

[Charlie_Balogh]

Sorry about that.  It is a 705G1

[old_geekster]

@Charlie_Balogh, not a problem.

Is you computer a All-In-One; Small Form Factor; Desktop Mini or Microtower?  This can make a difference.

[Charlie_Balogh]

SFF

[Charlie_Balogh]

win 10 pro x64

[Charlie_Balogh]

Any one have any ideas.......

[old_geekster]

Thank you for the additional information, @Charlie_Balogh!

Here is the memory that is recommended by Crucial Memory for your computer.  As you will see, the memory that is recommended is neither of the speeds that you mentioned.  Also, here is the memory from the HP website:

Memory

Feature	Description	Desktop Mini	Small Form Factor	Microtower
Memory	DDR3 non-ECC Up to 1600 MT/s Maximum 16GB 2 SODIMM slots	X
DDR3 non-ECC Up to 1600 MT/s Maximum 32GB 4 DIMM slots		X	X

While Crucial Memory shows a maximum of 32 GB, HP shows a maximum of 16 GB.  HP has their motherboards made to their specs.  I believe that your problem may be caused by having incorrect memory.

[Charlie_Balogh]

Wow......nice catch.  When I purchased the new memory, I just used CPU-Z to determine the current memory which was DDR4.  I will get DDR3 RAM and see if I am able to upgrade it.  I will let you know

[old_geekster]

You are welcome, @Charlie_Balogh!

I would appreciate hearing the outcome.