CPU at 1066 Mhz but DDR2 memory at 800 Mhz.

[Guest]

Hi!

I want to buy a laptop, but i am little confused. I see many laptops with 1066 Mhz FSB Processor, while the RAM is DDR2 at 800 Mhz. Can i expect a good performance from such a configuration? OR would it be better to go for a Processor with 800 Mhz FSB? OR a 1066 processor with DDR3 1066 Mhz memory (Not many options available with DDR3)?

Also, I would like to know if a resolutions of 1920x1080 is better on a 15-16 inch screen or a normal resolution of 1366x768? I have read that the laptops display best images at native resolutions only, while the picture quality is really poor at lower non-native resolutions.

 

[Guest]

I made a few calculations.

FSB at 1066 MHz means peak bandwidth of around 8533 MB/s. If i run the DDR2 (533MHz) RAMs in dual mode (2GB+2GB), then i can get an effective memory bus bandwidth of approx 8533 MB/s (4264 + 4264 MB/s). Which means, i need a memory bus running at 533 MHz to match the CPU bandwidth. Any faster BUS speed does not matter, as it will anyways not be utilized (I dont think laptops can be overclocked!).

Can someone validate the same please? I want to know if I should go for a higher bus speed or not. Also i would like some comments on DDR2 vs. DDR3.