Dual Channel Ram Compatibility Issue

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NaiteRyder

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Nov 22, 2015
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I still dont know why these rams are not compatible. My mobo (asus m5a97 evo r2.0) supports dual channel, but when i install all the rams the system doesn't boot. I've

corsair 2gb ram - VS2GB1333D3 *2
corsair 4gb ram - CMV4GX3M1A1333C9 *2

When i install them separately they work say
2* VS2GB1333D3 shows 4GB
2* CMV4GX3M1A1333C9 shows 8GB

but not when its all together.
I planned for 12GB memory due to this issue I'm using only 8GB (2* CMV4GX3M1A1333C9).

VS2GB1333D3 and CMV4GX3M1A1333C9 has same config including Latency.

http://www.corsair.com/en-eu/cmv4gx3m1a1333c9
http://www.corsair.com/en-gb/vs2gb1333d3


I've been looking for a solution for months.

 
Solution
VJ_Gamer
Rules to enable dual-channel mode
To achieve dual-channel mode, the following conditions must be met:
Same memory size. Examples: 1 GB, 2 GB, 4 GB.
Matched DIMM configuration in each channel.
Matched in symmetrical memory slots.

Configurations that do not match the above conditions revert to single-channel mode.

Place the 2gb sticks on slots 1 and 3. Place the 4gb sticks on slots 2 and 4.
Did you try all the slots with a single ram to check if any slots has a fault. Even though the ram is of same speed, they won't be playing together properly.

Please refer the below link to optimize dual channel using your 4 ram sticks:

https://www.intel.ca/content/www/ca/en/support/boards-a...

Peace.
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VJ_Gamer

VJ_Gamer

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Aug 8, 2017
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Rules to enable dual-channel mode
To achieve dual-channel mode, the following conditions must be met:
Same memory size. Examples: 1 GB, 2 GB, 4 GB.
Matched DIMM configuration in each channel.
Matched in symmetrical memory slots.

Configurations that do not match the above conditions revert to single-channel mode.

Place the 2gb sticks on slots 1 and 3. Place the 4gb sticks on slots 2 and 4.
Did you try all the slots with a single ram to check if any slots has a fault. Even though the ram is of same speed, they won't be playing together properly.

Please refer the below link to optimize dual channel using your 4 ram sticks:

https://www.intel.ca/content/www/ca/en/support/boards-a...

Peace.
 
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Solution
B

brispuss

Splendid
Dec 27, 2014
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Issue is probably due to be inter-module incompatibility because the memory modules are not from (the same) dual channel kit.

As mentioned by VJ_Gamer, try arranging modules in suggested slots.

In BIOS, raise DRAM Voltage by 0.05 V, this may help. Not recommended to exceed 1.65 V for the DRAM Voltage though.

If still having issues, try increasing NB Voltage by 0.00625 V also.
 
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NaiteRyder

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Nov 22, 2015
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Thanks, I placed the RAMs as u told, Its working fine now.
But
It shows 12GB and only 9.90GB usable.
 
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