Will a quad Q8300 bottleneck gtx 560 Ti ?

i bought my XPS 630i a couple of years ago and im looking to upgrade my graphics card. the PC came with SLI GTS 240's.
im looking at either getting two GTX 460 768mb or the 1gig or a GTX 560 Ti 1gig. will either of these bottleneck with my setup

intel core 2 quad Q3000 @ 2.5 GHz
4 gigs of DDR2 kingston 400 MHz max bandwidth.
nForce 650i SLI MCP motherboard

depends on your monitor resolution

1920 x 1080*

ive never oc a cpu you before how would i go about doing that. would the fact that i bought the xps from dell online stop me from oc the cpu. i think i read something about the option eing locked.

well right now im paying for college so i wont have the money to upgrade a whole lot anytime soon. if oc my cpu to 3.0 GHz or more, which ive read people doing with not much problem id would like to go that way for now then look to upgrade the other stuff down the road.

in new to oc CPUs but ive tried some guide on how others have oc the same cpu i have but all tha happens to me is that my moitor goes into power saving mode and my cpu fan gets really fast (im assuming thats a bad thing)

i dont know if that XPS have OCing options in the bios

It depends on the game. But in most cases no. (Technically perhaps. You might only get 85fps vs 100fps because of CPU bottleneck but since you'll mostly be safely over 60fps it's a rather irrelevant difference.)

Go with a single GTX 560 or 6950 (about the same price now). Don't bother with SLI or crossfire at your resolution--the single card is sufficient and will cause fewer headaches.

Upgrade now and enjoy it now. You do not have to replace the entire system--utter nonsense.

And seriously look into over clocking. You don't need to do anything drastic with voltage increases, etc. to get a couple more ghz out of that CPU.

well ive tried my friend's GTX 460 and in rift i was getting 25-35 fps on medium setting and final fantasy 14 im getting low 20s mid 30s running around outside but in large cities or crowded areas i drop to 15-27ish. i got the gtx 560 Ti 1gig from best buy with a 30 day money back. and im not gettting much better fps. on the ff14 benchmark test theres not much of a difference between the gtx 460 and gtx 560, but should'nt there be ?

tried heaven averaged fps in mid 30s with the gtx 560

ive read that if you get around the same fps in different resolutions you might have a bottleneck. is that true?

If you have the same FPS with a better GPU then yes, that means you have a CPU bottleneck. Try overclocking it. Try cleaning up tasks and processes that suck CPU power (as chriskrum said).

well im downloading rift again going to see how the gtx 560 does on it

@helltech
do you know much on oc cpu ive never done it before ive tried following some guides only but it never works.

The games you're talking about are not going to bottleneck on a 2.5 ghz intel quad core due to the cpu. Their recommended system specs are a fair margin lower than what you have and for dual cores. If they do bottleneck, it'll be at some hi fps that will likely exceed 60fps and doesn't matter.

With a single monitor at 1080p any modern single card in the range of a 460 1gb or 6850 (or better) will be more than sufficient for high frame rates at high settings. As I've said before, avoid SLI or crossfire setups. They introduce lots of issues and only make sense when multiple monitors or at very high resolutions.

I'm not sure what you are doing with your over clocking attempt. You shouldn't have to touch the voltage--just the FSB. You may have to lower your memory multiplier first.

Post in the overclocking forum for specific advice. I'm sure there are some peope lurking who have OC'd your exact system.