I tried fps_lock and other ones. Nothing. I'm also getting the case I had earlier with 6.40.2 - the frame rate seems to lock on powers of 2. I put fps_max at 60 and I was getting 32 fps. Set it to 68 and I was getting 64 fps. Setting it to 300 puts it at 256 fps. Setting it to 120 has 64, and 200 has 128. Here are some screenshots showing the effects:

Screenshot #1 - fps_max at 200, but 64 fps (which varies from 63 to 72)
Screenshot #2 - fps_max at 1200, but 275 fps (which varies from 25x to 31x)
Screenshot #3 - fps_max at 60 with fps_lock on, but getting 32 fps (which varies from 32 to 40 getting nowhere near 60)