DDR2 ram sequance!

My friend has a HP Pavillion computer that has a 256mb 3200 in slot 1 and slot 3.He has just purchased 2 1 gig sticks that are 4200 speed.Would he place the gig sticks in 1 and 3 slot?Would someone who knows the answer to this please share your knowledge.There's 4 slots in this computer.

 

Need to know the model of the machine, but from your post it sounds like he may be trying to add DDR2 memory to a machine that only supports DDR.

 

This is a HP A1020N.It takes ddr2 ram 240 pin.Does something seem wrong to you?

 

I was just reading your first post wrong. You should put the 1gb modules in slot 1 and slot 3 and put the existing modules in slot 2 and slot 4.

The new memory will only run at the same speed as the old memory.

 

Thanks for your answer,it was appreciated

 

You're Welcome.