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Community Manager
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Help with doubt ,RAM & GA-Z77-D3H mobo

Hello .. Im building a new pc for work ..

Im buying this motherboard Gigabyte GA-Z77X-D3H , I already have 2 sticks of 4 GB each one they are:

 

Corsair CMZ8GX3M2A1600C9 8GB 2x4GB DDR3 Vengeance 1600MHZ 1.5V XMP RAM CAS9

 

 

and I want ( or at least my idea is ..) to install other 2 sticks of 8 GB each one

 

 

Corsair CMZ16GX3M2A1600C10 16GB 2x8GB DDR3 Vengeance 1600MHZ 1.5V XMP RAM CAS10

 

 

both memorys are 1600 mhz , both are :1.5V the only difference is that one is ¨CAS9¨ and the other ¨CAS10¨

 

my idea is to put them this way ,in order to make them work in dual channel (?) : 4-8-4-8 =24gb of ram ?

 

 

my doubt mixing 4 and 8 gb sticks .. I would get dual channel ? or is not good,,its a waste of money, and better get another couple of 4gb to make 4-4-4-4 .. ? any help would be very appreciated!

 

thanks in advance

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3 Replies
Community Manager
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Yes, they'll work. The faster RAM (CAS9) will default to the slower RAM (CAS10). If you have both color coded memory slots occupied it will run in dual channel.

Community Manager
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Thank you Major A! .. so if I fill all the slots : 4-8-4-8 ,it would deliver me 24gb of ram ..

ok Im sure now , correct me if Im wrong , but I was afraid that if I fill them whit 4gb for the first slot this would downgrade or lower the 8gb performance ....

and yeap giga z77 dh3 it has blue-white-blue-white slots

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Community Manager
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It will work. Typing this on a computer running 2 different sets of DDR2 800 (2x1GB Elpida and 2x2GB A-Data). Working just fine and has been for a while now. Did something similar with my old C2Q 9550 machine, had 2 different OCZ kits running fine. The only tid bit of advice to help ensure stability is to run the slower kit in the slot 1 and 3. Then the faster stuff in slot 2 and 4.

Here's a screenshot of my mismatched RAM in CPU-Z.

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