Memory Clock

Hey my radeon 4870 that im getting has a Memory Clock of 900MHz (3.6Gbps), is this good? GTS 250 says it has one of 2000mhz(effective).

Can someone tell me what this means and if it is good or bad?
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More about memory clock
  1. The HD4870 uses DDR5 which gives it a lot more memory bandwidth than the GTS 250 which uses DDR3.
  2. One is saying actual memory speed 900MHz the other one double data rate 2000MHz which is actual 1000MHz. You will be fine with the 4870 it is a stronger card than the GTS250.
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