RAM help

[giovani]

one friend of mine wants to add one module of 2 gb ram (corsair value select 1333mhz) he already has 1  4gb module wich is the same (corsair value select 1333mhz) will they work in dual channel? the motherboard has only 2 slots  

MSI h61m-31(g3)

     

[ERSCreeper]

It will work but not optimally.

[giovani]

the 4gb module

Speed RatingPC3-10600 (1333MHz)

SPD Speed1333MHz

Tested Speed1333Mhz

Tested Latency9-9-9-24

SPD Latency9-9-9-24

[giovani]

and the 2gb module he wants to buy

 

Speed RatingPC3-10600 (1333MHz)

SPD Speed1333MHz

Tested Speed1333MHz

Tested Latency9-9-9-24

SPD Latency9-9-9-24

[WoodenMarker]

It's highly recommended to use the exact same ram for dual channel but it will work in dual channel asymmetric. You don't configure anything differently but it just works differently than symmetrical dual channel where the two sticks are identical.

 

With this, you'll get an improvement over single channel until your ram usage goes over 4GB usage because it will be 2GB from the 4GB stick and the 2GB stick in dual channel with the 2GB left over.

[giovani]

so i should tell him to get the same one

[SMURG]

so i should tell him to get the same one

Well, yeah, although at the same time it's not a huge deal really. It will work, just not in the most optimal way.