3d cards did not exit at the time, everything was done on the CPU.
And yes your pc had a graphic card, or you wouldn't have had anything to hook your screen onto ;)
And yes your pc had a graphic card, or you wouldn't have had anything to hook your screen onto ;)
Anyway, the USD 6k price tag was very high since I remember running Doom on a sub USD 2k PC. Most probably closer to USD 1k.
EDIT - looking at some ads in the December '93 issue of Computerworld [0] there's a Compaq ad saying "the Deskpro with Pentium starts at just $3,199" (both the "starts at" and the "just" make me think you could make it cost a lot more than $3,199, altho you could surely also play Doom on a cheaper computer).
[0] https://books.google.de/books?id=WESBpiNtNTEC&pg=PA19&hl=en&...