You're sending out some serious mixed signals. Core i5-2500K - but not overclocking.
MSI Big Bang-Marshal motherboard with 8x PCI-e X16 slots - but only a 9500GT graphics card with no plans to upgrade soon.
your 9500gt is very weak it will bottleneck i5 2500k
sorry for stupid question but what does this mean ? Yo're saying i wont be able to play Crisis, GTA 4and such ?? You're saying it will damage i5 or something ?
I am talking about intel chipset, mobo made by INTEL BLKP67BA series, I might overclock but I've never done it so probably will leave it the way it is cause i don't want to damage anything. I have 2 GB ram
It's an un-balanced system with a very strong CPU and a very weak GPU.
Your 'Crisis, GTA4 and such' gaming performance will be limited by the graphics card.
Your games might not run any better than they do right now.
If you buy the i5 2500k (might as well since 2400 is near the same price) and mobo, eventually (asap) you will want to upgrade the graphics and memory (4gb-8gb at least). With your graphics/2gb of ram your current upgrade won't do you much good.
Be prepared for another ~$200-250 for this upgrade. That is assuming you go for a 560ti + 8gb ram. I would wait for new cards though or buy a used card.
Also it is very difficult to hurt your system by overclocking. Most mobo's/cpus etc have a safety mechanism to shut off quickly if not volted correctly/stable.
Also tx650 is a good choice, but unless you go with an high in graphics card you do not need nearly that much power. 430w+ would do you fine. I'd only get a 650 if you plan on getting a higher end card down the road or want more upgrade potential/o.c ing.
Hotthree I've already ordered 4GB Ram + intel mobo blkp67ba series + Corsair TX650W PSU (I'll have it all in 2 days) so the only thing I will want to upgrade is graphics card but I'll do that in few months time if the old one will allow me to play games with ease.