Dont overclock it, not worth it. Once have AGP GeForce2 MX400 and it heats up like hell (dont remember how high I go though) and it struggle to play MoHAA at 1024x768 full detail

I have TNT2 M64 PCI 32MB, I use it for backup like when I fail flashing the graphics card BIOS, happen once on my X1800GTO but this little card save its life!