Will you be jumping to the Xeon Haswell when it becomes available?
Don't plan on doing another platform shift for another 5 years. Xeon is geared for servers anyhow and I don't serve off this rig.
The reason I made the move now was because components have been trending towards stupid low prices if you time the purchase right,
my previous machine was just over 5 years old and the CMOS was going flaky on me
AND
this new 4790K processor is stock 4.00 GHz with Intel Turbo Boost to 4.4 with real-time throttling. I ticked up the overclock to a max limit of 4.6
That's enough horse power for my needs for the long term and I like nice even numbers for the base clock.
It has taken Intel forever to get a
multi-core processor to base @ 4 GHz. To give you an example of an important gain, on my old Gulftown rig - which even had 6 cores -
it would take about an hour and a half to convert my entire digital music library (approx 4500 songs) from various lossless formats to variable bit 160 kb/s
for my phone or usb stick (car tunes). This new rig does the same in about 40 minutes.
I expect at least a 25 - 30% reduction in encode time for raw video too.
The other cool thing about these 4th Gen processors and their supporting chip-sets is that they really throttle down well below the stock *active*, rated speed when your
doing mundane crap like surfing, word processing or viewing pictures and playing music. Mine drops down to 800 MHz and the entire rig goes into power sipping mode.
My last rig was nearly a space heater on average and definitely a blow torch when I gamed or encoded ...
So my biggest goals were,
cut way back on the number of power sucking hard drives,
get faster processing power for the big "jobs" & power efficiency for the rest of the time,
and get hardware that Win 8.1 can fully exploit.
Within the next 5 years, DDR 4, USB 3.1, 14 nm processors and SATA express will be mainstream at affordable prices.
I'll be upgrading to a new build then.