i remember like 6 months or so back wow was patched to utilize dual cores. has wrath updated to utilize quad core? becuse my frames blow right now and they would double if wow would fully utilize my quad core. with all the settings maxed out and full dynamic shadows on i get around 20 - 30 fps. worse sometimes. the messed up part. ive got a qx6700, 4 gb of ram and a 9800gtx. i get 20 - 30 in crysis, i should be getting 60 easily in wow. BUT crysis also supports quad cores.
No and it probably never will. Stuff is just now starting to use dual cores effectively. I bought a dual core over a quad. Id rather have 2 faster cpu's that are used than 4 slower cpus and only 2 are still used for games.
When your waiting for scenario queues playing warhammer, designing a website and have 4-8 firefox pages open, you'll be damn glad you have a quad core. Also for anyone wondering if WoW is using all 4 core's and your using Vista, get the CPU usage gadget for your sidebar.
But, yes for most people quad core's are not necessary.
AMD Phenom X4 9850 @ 2.8ghz 4GB Corsair PC6400 (800mhz DDR2) nVidia Geforce GTX 260 SP216 @ 675/1460/1100 Windows XP Pro X64
I run the game at 1920x1200 with everything maxed. 16x AA and 16x AF and get around 40fps in a taxing zone (like sholazar for instance) and around 70fps in a more simplistic zone. If you have a good video card...or a decent one like the 9800GTX or 4870, the best way to go is to max everything out to take that load off of your CPU. At high resolutions with AA and AF on, the game becomes MUCH more GPU dependent. For instance, when I disable AA and AF, the difference in framerate is minimal and in some instances, it actually goes up with AA and AF enabled...I'm guessing because as a whole, modern day GPUs are much faster and more complex than modern day CPUs. Hence why using a GPU enabled folding@home client gives you a massive speed boost.
Anyway, to answer your question...I really don't think wow will ever utilize quad-core cpus. The power of quad-cores really comes into play in multitasking. As mentioned, if you want raw speed for gaming, a high frequency dual-core like the Core 2 Duo series (E8400, 8500, or 8600) is really going to give you the best performance. Especially if you have the knowledge and means to overclock it (and those CPUs do overclock very well in general).
To put it plainly, if you want the absolute best performance in games, GPU should be your primary concern. Granted, you don't want to still be rocking a P4 3ghz, but any core 2 duo, core 2 quad, or phenom (B3 stepping, not the old broken ones that required a patch) should do you just fine.