I'm about to spend about 144 bucks on two sticks of 256mb Corsair DDR400 Low Latency. People keeping talking about issues they have been haveing with 2 sticks of the same stuff except 512 totaling 1 Gig. with the Asus P4P800 Delux. It shouldn't make a difference should it? both will run the same juat more physical mem. right? I might splerge and go for the 1 Gig. But not if it is going to perform worse! Also, can i later mix 2 256 with 2 512, will that work?