can i combine a DDR2 ram with a DDR3 ram?

[Chinokun802]

Hi guys,may i ask if i had a DDR2 2gb ram and i want to install a DDR3 4gb ram inside my motherboard since my motherboard which is gigabyte G41M combo is support DDR2 and DDR3 Dual channel ...its that work for that?

 

[rhysiam]

Nope, sorry. You can use either DDR2 OR DDR3 RAM, but not both at the same time.

 

[Chinokun802]

how about using a DDR2 2gb with 667mhz and a DDR 2gb with 800mhz?

 

[CyberBlade]

Your system will down scale the higher frequency RAM to 667MHz. Both will run at same frequency. You can't run 2 sticks at different frequency in one system.

 

[rhysiam]

As @Cyberblade says, that should work and run at the lower frequency.

DDR2 RAM has started to get more expensive now though, so just watch how much you have to pay. You *might* be cheaper just getting a DDR3 set, which is guaranteed to work (mix and matching can be a bit of lottery).
For example, $29 gets you a 2x2GB DDR3 kit: http://pcpartpicker.com/product/MtDwrH/mushkin-memory-996573
$50 gets you a 2x4GB DDR3 kit - which according to the mobo specs is supported: http://pcpartpicker.com/product/jHkD4D/kingston-memory-kvr16n11s8k28

Whether you actually need 8GB RAM on a computer that old is another question, but it's possible at least.