Does MHz really matter in selecting Graphic Card

I am looking for an affordable graphic card for my desktop PC which has DG33 Intel chipset. I have one PCI 16.0 slot, 4GB DDR2 RAM 800MHz and I wonder if I can use DDR3 Graphic Card with 1200MHz? I am not a hardcore gamer but I like clarity when I play games. Also which graphic card is good, the one with fan or without the fan?
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More about mhz matter selecting graphic card
  1. First off, a fan is used to dissipate heat. Considering your other specs, most likely your PC will bottleneck your card. You will need to look for an older card.
  2. Best answer
    Yes - graphics cards have their own separate memory (GDDR3 or GDDR5). What are your specs, budget, monitor resolution, and what games do you want to play?
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