alt Hacker NewsHe is probably referring to Beta 1.6.x. I remember running 1.7.3 in 2011-2012 on a potentially 1 or 2GB RAM machine and some Nvidia 7xxx series card (7600?). It worked fine on Linux.
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deaton • today at 6:02 PM
Nope, it was actual 1.6.4 (and probably beyond that too). It wasn't amazing but consistent 30fps with some ATI card from the time. It had a Pentium D of some sort, can't remember exactly what.
No reason it couldn't be Not-Beta 1.6.x besides the 1.3 singleplayer server split, which doubled memory requirements, but 1GB was enough after the split.