Newbie: Is my RAM CAS2 or CAS3?

[phUnk]

Just bought some ram that was sold as high end Infineon CAS2 but its markings look like CAS3 to me. Can anyone confirm the CAS #? (My machine is not finished yet so I can't just test it myself.)

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Infineon
pc133-333-520
HYB39S64800CT-7.5
128MB sync 133 CL3
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[mastertech01]

By the markings I see CAS 3 ram there. However many sticks of ram will run higher than its rating. Ive had Mushkin Mosel that was read by SPD as CAS 3 but ran up over 150MHZ at CAS2...