The 32-bit already does. However it does not take full advantage of all cores, and never will. It would require an engine rewrite to do that.

StarCraft 2 only fully utilizes 2 cores. Hoping WoW will ever fully utilize 3 or 4 is never going to happen.

WoW already utilizes multiple cores.

@Drakkenfyre

How to make WoW use 4 cores:

Step #1
Locate your WoW Installation folder
Step #2
Open your WOW folder and find the "WTF" folder.
Step #3
Open your "WTF" folder and you should have 2 things inside, one folder "Accounts" and a file "Config.wtf"
Step #4
Open the Config.wtf file, use notepad or some other text doc.
Step #5
Once inside find the line SET ProcessAffinityMask "3" , now change the 3 to 15, save the file and close it.
Step #6
Once you have the file close, right click the file and click on properties, and place a check mark in the read-only box.
This make it so every time WOW starts it does not replace the 15 with a 3.

I'd doubt it. Multi-threading gets tricky. Not to say that they couldn't add that in the future though. Mods on one processor, game on another, or something.

The AffinityMask setting was rolled into the default game a couple of years ago. In fact, changing that setting in the config.wtf file does nothing, it ignores it. The game automatically sets it to whatever cores it detects. The settings are changed because the game defaults to all cores.

The point you missed was FULLY utilizing all cores. The game can take advantage of multiple cores, but it does not take full advantage of it. The extra cores are only doing a little processing. They aren't dividing up the load like they could, and increase the performance even more.

But you can still get more performance out of it. You can set your Windows to run on the third or fourth core as it's primary core, leaving the first two to be dedicated to the game.

@Drakkenfyre

Could you explain, or post a link on how to set Windows to run the third or fourth core is its primary?

huh... the more your know*

learned something today, cool.

It's been a long time, and I can't find the article on changing the affinity for Windows itself, at least for Windows XP. I can find the article about forcing older programs to use other cores, leaving Windows on the first two, but with the changes to the game, it would probably override it.

The easiest way to do it is to run the program, then bring up Task Manager. Right-click the process, select Choose Affinity, and change it.

This places the game on other cores, and should let Windows take the first two cores for itself. With the OS and game on separate cores, it should increase performance. The old AffinityMask setting used to let you do this, but like I said, the game autodetects now. However, the perfomance increase might be minor. Newer versions of Windows are pretty good at shifting loads around, and the game might just try to ignore it anyway.