looking for someone with knowledge on 5D Mark iii

[angierobins]

Please help me I am a mom that wants to capture all the memories of my kids and grandkids as they play sports.  I bought a 5D Mark iii and 70-200 F2.8 lens.  I am looking for the fastest write speed card for this camera.  I know it is older and won't use the new fast 1500mbs cards but if someone could tell me what is the fastest card it can read and point me in the right direction that would be fantastic.

Thank You,

[jaewoosong]

As another poster has shown a detailed CF performance testing, the simple answer is any Lexar professional or Sandisk Extreme Pro will suite your needs.

For a sports mom, you'll likely shoot JPG only (shooting burst mode with RAW files will quickly eat up your hard drive and take a long time to process).  Shooting JPG only, it's highly unlikely that you'll ever max out the internal buffer and any of the lexar sandisk cards mentioned above will keep up.