In my search for the answer to how large a dxt1 compressed 1024x1024 texture was in video memory, I found the answer (512kb) and some basic math's. But because I don't want to break out the calculator every time I want to know the size a texture will end up in memory I thought it best if I take 5 minutes to commit a few sizes to...memory
Please correct me if I am wrong.
I assume mip-mapping isn't calculated already so all these values would have another 50% ontop if they have mips.
Knowing the size of 3dc/BC5 would be useful too, the wiki page was confusing for that one.