Is dell dimension L733r have 3d card

Woo - that is old. Did not even recognize that number.

Go to the support section at www.dell.com , and enter the service tag (sticker
on the back). The Dell web site will tell you the original system configuration
and can also interrogate the system and tell you what is presently installed.
You can also use the model "Dimension L733R" to find less precise information
about the computer...

Then come back and tell us and maybe we can help.