Apparently Vista chews up an extra chunk of you memory allocation space that XP doesn't for the memory in your video card. The more video memory you have the more it eats your address space. Typically you only have 2GB of user space per application. When you cross the limit you crash. So not only is Vista Slower for games, you will much more likely crash especially if you have big Video memory like on a 8800 GTX.
Who knows when Microsoft will fix this one as there is speculation it is mapped this way for the latest wonderful DRM protection Vista offers. Yippee.
Nice Graphs here, but read the whole article and maybe the first one. It is quite informative. If I didn't already plan to avoid Vista, this one would seal the deal for me.
http://www.anandtech.com/cpuchipsets/showdoc.aspx?i=3044&p=2
"At 2.16GB with our 8800GTX on Vista versus 1.30GB on XP, the increase in address space usage is now over 40% of the default and had we not modified our memory allocations Company of Heroes would have crashed."
Who knows when Microsoft will fix this one as there is speculation it is mapped this way for the latest wonderful DRM protection Vista offers. Yippee.
Nice Graphs here, but read the whole article and maybe the first one. It is quite informative. If I didn't already plan to avoid Vista, this one would seal the deal for me.
http://www.anandtech.com/cpuchipsets/showdoc.aspx?i=3044&p=2
"At 2.16GB with our 8800GTX on Vista versus 1.30GB on XP, the increase in address space usage is now over 40% of the default and had we not modified our memory allocations Company of Heroes would have crashed."