ces: Unless you have many tabs with constant heavy JS or playing video they are not going to be using much CPU. You would need multiple tabs each pegging a core at 100% before hyper-threading might help. Context switching isn't a difficult task on a modern CPU. It's far more likely you are running into other resource limitations like RAM/disk IO/Network IO.
I agree. It seems to be a common misbelief that having a email program and 10+ tabs open equals multitasking. Most of the time the tabs really do nothing. Even flash player might pause the game it is playing if you switch a tab. And it is easy to check the CPU usage via Task Manager. I have 10 tabs open in Chrome and the processes do nothing.
Multitasking is something where you actually have high load on multiple cores. Like rendering or video editing. Having multiple programs open does not equal heavy multitasking.
Back on topic: I'm finally upgrading my E6400 system and Ivy Bridge (3570k) seems to be a good candidate for rendering. I'm actually very interested in HW RNG which might give a small boost to many unbiased renderers which rely on random umbers heavily.
I hope the release schedule holds.
I'd like to have Intel LAN chip. Are there cheaper alternatives than Asus P8Z77-V?