Doube bank, single banks,memory slow down?

My motherboard Ga-X48 DQ6 supports only 8 Gig of ram. DDR2

I was thinking of getting 2 sticks of 4 gigs to keep the slot use to 2 slots
and so not slow down the memory system by using all 4 slots.

BUT I read an article that ( I think) indicated the "slow down" was NOT
using all 4 slots but by having 4 BANKS of ram being used.....?

That the 4 gig sticks used 2 banks each. So that by spending a LOT
of extra money and buying two 4 gig sticks of ram (2 banks each- total 4 banks)
I would end up just as slow as filling my 4 slots with four (single bank) 2 gig sticks of ram!

Of course I also don't know even IF my motherboard can even use 4 gig sticks of ram.
The memory support list at Gigabyte website only list up to 2 gig sticks.

Thoughts very welcome,
Thanks,
jmc2

Yes, that seems to be the way to go. Sure saves me a good bit of money!
(going to have to make sure my next motherboard can use more then just 8 Gigs)

Thanks,
jmc2