It's UNIQUE to personal experience, 20% may not be a lot to someone but to someone else it may be VERY noticeable.
I can safely say when I went from x58 to x79 (i7-930 to 3930k) I noticed a huge improvement. Not simply due to the CPU but the SSD performed better too, and that was noticeable for me and the primary reason I upgraded (well and I wanted more cores too). I could tell the difference on my macbooks between generations from the intel chipset and ssd performance too.
Now, add the fact that I can run OSX Virtualized and not slow down my system, and keep all my other apps open and I`m very happy. Then again, I run a lot of apps at once on 2 x 30" screens and a 3rd 21" screen doing work. Not the normal usage but there are cases where 10% can mean a LOT, and that 10% is mostly just CPU performance it doesn't take into account the SATA performance increase, RAM, etc...
If you are on an i7-920 I say by all means upgrade to the latest generation CPU, and get a latest generation SSD and you will notice HUGE improvements in not only game load time but also every day browsing. When my non-tech friends can tell their system is faster just browsing the web from a SSD upgrade that's telling you something.
I got a SSD years ago and wish I got them as soon as they came out.
The whole waiting until next year to get 40% increase instead of 20% this year screwed me out of a good 1-2 years of really fast computing because I was thinking the same as a lot of people here.
I can safely say when I went from x58 to x79 (i7-930 to 3930k) I noticed a huge improvement. Not simply due to the CPU but the SSD performed better too, and that was noticeable for me and the primary reason I upgraded (well and I wanted more cores too). I could tell the difference on my macbooks between generations from the intel chipset and ssd performance too.
Now, add the fact that I can run OSX Virtualized and not slow down my system, and keep all my other apps open and I`m very happy. Then again, I run a lot of apps at once on 2 x 30" screens and a 3rd 21" screen doing work. Not the normal usage but there are cases where 10% can mean a LOT, and that 10% is mostly just CPU performance it doesn't take into account the SATA performance increase, RAM, etc...
If you are on an i7-920 I say by all means upgrade to the latest generation CPU, and get a latest generation SSD and you will notice HUGE improvements in not only game load time but also every day browsing. When my non-tech friends can tell their system is faster just browsing the web from a SSD upgrade that's telling you something.
I got a SSD years ago and wish I got them as soon as they came out.
The whole waiting until next year to get 40% increase instead of 20% this year screwed me out of a good 1-2 years of really fast computing because I was thinking the same as a lot of people here.