You asked what these settings mean, so here's the boring bit.;-)
The HT settings ( Hyper Transport )is the setting that transfers the data from the CPU to your AGP card. The better the graphics card, the faster the transfer rate to the AGP card. The settings usually are 200Mhz > 400Mhz > 600Mhz > 800Mhz and 1000Mhz. 1000Mhz being the best.
So yes it is running at it's optimum. lol