Your IT guy actually knew what he was doing! WOW!
No probs with PCI-E 2.0, it is plenty fast enough for a GTX690-there WILL be a small loss of performance but TBH you'll only notice it by running benchmarks.
I'll make it plain that I'm not a fan of multi card configurations so my advice is skewed, I just feel the downs are greater than the ups.
So from that perspective I'll say your best option will be something around the GTX770/R9 280x class: http://www.tomshardware.co.uk/gaming-graphics-card-revi... I don't think that at stock clocks the CPU can drive a faster card to its fullest and on a single 1080 display that class of card is enough for all but the most discerning of clientele.
Pushing the current CPU is a worthwhile pastime, current games are FINALLY taking advantage of Quads and with a little tweaking (and a better cooler) you will easily be able to play even the uber demanding titles out there at high settings with the current rig (plus better GPU), even at stock speed that i7 is still no sloth so I'll strongly advise against a full CPU/MB/RAM upgrade-it's just too much cash for too little gain.
My attempts at pushing the CPU beyond stock were by using the ASUS overclocking routine (a menu that is provided by ASUS) which resulted in the PC locking up at even slightest attempt. I simply don't know enough to do more so = fail (lol) Side bar, I use a Corsair hydro (self contained) unit for CPU cooling, Case is air cooled with tons of air volume moving.
So would consideration towards up grading the CPU be in order along with GPU and SSD? I would really like to keep the MB/RAM etc...
Your IT guy put just about the fastest CPU available into the MB at build time, any upgrade will be minimal and you'll have to look on E-bay or Craiglist to source one, nobody I can find holds new CPUs for that 'board.
It's odd that OCing is a no go, could be a memory issue, if you want, you can look further into the subject. Toms has a few useful articles on overclocking those CPUs in the Overclocking Forum stickies.
Best advice I can think of is to get a upgraded graphics card and see how things pan out, the installed cards lack of VRAM is definitely going to be a restriction in current titles.
Well building a new $1000 system or something might perform better and be more future proof or if you want you can add something like a gtx780 or something in there but i would rather build a whole new system but thats just me
There's no gaming advantage with an i7 the less expensive i5 does just as well, but if you're using software that can take advantage of the i7s Hyperthreding then go for it!
Agree about the Titan, the GTX780 performs much the same for less.
Performance of the GTX780Ti is yet to be seen as is its final pricing.
Still think your best option is to drop in a new card and see how it runs before doing a CPU/MB upgrade, particularly with Christmas so close, if it does speed tings up enough for you then you've saved several hundred dollars, if not, well you were going to upgrade anyway weren't you?