Crysis 64 performance worse!?!?!
http://www.legionhardware.com/document.php?id=698&p=7
Scroll down the page.
About memory...
"I believe the answer is more fundamental:
64 bit numbers are twice as big as 32 bit numbers and therefore consume double the memory.
each 32 bit reference costs 4 bytes, 64/8 = 8 bytes. An OS maintains a lot of references.
the 64 bit architecture is faster because of the extra core registers and the increased size of the base registers. (registers are the fastest storage in a cpu)
32 bits processors have to do a lot of 64 bit math and they do it inefficiently."
Quoted from a Vista research site.
Although I don't think he's 100% right. It may allocate the double memory for its references and pointers, but that does not mean its going to use all of it. Vista 32 loads up with 700-800 mb ram, while Vista 64 loads up around 1.2gb ram.