Okey, nice. That way is the same as the first method i posted...

Hope you'll enyou glxtreem.

You can see what extentions the graphic card supports by checking the extention class of glxtreem, like multitexturing and so on, but the texture size i don't know actually. You can also see wich renderer and vendoe is used. Check the font demo on info how to use these tings.