hitechgowthaman :
2gb 2000Mhz beat 4gb 1800Mhz because the mhz is very important than capacity ,so buy 8gb 2000+Mhz overclockable memory from trancend.com directly @ low cost of $119 with lifetime warenty or 4gb $74 only 4gbx2=4000+Mhz @ low price of $150
MHz is NOT very important because RAM performance doesn't have a significant effect on most programs. Capacity is far more important than frequency and timings. Besides that, 2GB of 2400MHz would lose to 4GB of 1333MHz because neither photo shop nor high quality gaming can be done on 2GB of RAM, your insane if you want to try high quality gaming or photo shop with so little. Even 4GB isn't enough for some of the newest games.
Gaming is known for being among the worst offenders among programs that don't run any faster with higher performance RAM. Faster RAM has been proven to not increase maximum frames per second but it sometimes does improve the minimum frames per second slightly. Even then the difference between 1800MHz and 2000MHz would be indistinguishable and the 2GB of 2000MHz would have to run in single channel while the 1800MHz 4GB could be dual channel and that would throw off any minute gains of a 200MHz difference. The difference between 2GB and 4GB would be very clear since 2GB isn't enough memory and 4GB is not enough for some games anyway.
Then you tell us that two 2000MHz modules will basically mean 4000MHz... Do you know anything about RAM? I have to ask that because that is completely false. One RAM module at 4000MHz (none go that high right now) would slaughter two 2000MHz modules. Dual channel (IE having two modules) has nothing to do with the memories frequencies. Dual channel doubles the width of the interface from 64 bits to 128 bits. However, unlike GPUs our CPUs can't make good use of wide memory buses like that so even though the maximum theoretical bandwidth is doubled by doubling the width it is actually only a marginal improvement over single channel. Triple channel is a smaller improvement over dual channel and quad channel an even smaller improvement over triple channel.
Please study up on RAM before making claims about it.
Your whole argument was completely wrong and didn't help at all.