My daughter need a new dvd drive for her computer. It's main purpose will be playing her Sims disks & music. Walmart has an internal memorex with 24x read/write speed. - OR -the portable ones are 8x read/write speed. Her Computer is a Dell Dimension 4600, not super fast but able to play Sims 2. Will the memorex work better for this purpose? The fact that the memorex is a faster drive than the original won't be a problem will it? Thanks for your response.