If your PSU (power supply) is good enough for teh GPU, then it'll just be fine.
You might want to consider getting a new MOBO (motherboard) soon though. To get from DDR2 RAM's to DDR3.

intel hd 3000.

Radeon 7870 or NVIDIA 670. Those two are minimum decent GPU if you want to game.

GeForce GTX Titan

More info for Power Supply: 500W

What monitor u have, max resolution

Ithink the HD7850/ nvdia 650 is very good upgrade, but the ati is better

i recently built a gaming pc. dude trust me GTX 650 TI 1GB DDR5 Is A Very Nice Graphic Card. Running All Of My Games On Ultra/High! ^^

"(a site says I can run up to 23% of games released over the past 12 months)"

Which site please? Curious what it might say for me.

Joking apart, GTX 650 Ti is more than enough for any game.

It depends on the games you want to play and the monitor you have.

that quad core proc is decent enough for most games (most games don't use the multi-threaded core (like crysis)

You need to upgrade to at least 850watts (corsair, enermax, cm) for you to change your gpu.

one of the best upgrade you can do is get a SSD it speeds up a lot of game loading time and specially OS stuff.

Upgrade (might depend on the games)
1.) PSU
2.) SSD
3.) GPU

later upgrade (max out your mems)

Really no one needs a Titan for today games!!! You need a Titan or SLI only if you want to game with multiple monitors, run stereoscopic 3D with all eye candy activated, or play games at 4k, but for that standards even Titans take a hit, and prices for that kind of Hardware are still high .

A single Geforce 770 GTX will do a fine job running all actual and near future games(Both 2 or 4 Gb cards will do a nice job, but if you find good prices go for the 4 Gb one for future games), and its not overpriced as Titan. But also check if you PSU support the voltage and power connections required for the 770.

Dont go for the Higher price, but for the best price - performance combo, and by now the 770 is the best investment going with Nvidia line. (Asus GTX 770-DC2 series have an excelent performance and quality.).

Happy gaming to all friends!!!

I personally have a Gigabyte GTX650 2 GDDR5 OC, and i use it on PCI 2.0 (the card is 3.0) and i can play pretty much everything at medium-high.

For example I play Skyrim with more than 50 mods on Ultra settings, Guild Wars 2 medium-High, CS:GO high at 60fps, Dota 2 high 40-50fps etc.

But if i was to choose again i would propably go for the amd 7790. I bought mine some months before 7790 came out...or go for GTX650Ti

I upgraded the video card in my computer from an old Radeon 6450 to a GTX 650 1GB, not the Ti edition, and I can run all the games I like on full resolution and every graphic option set to max. I have an Intel i5, with 8GB DDR3 ram, and 520W power supply.

The GTX 650 Ti has more performance maybe, but needs more power (the 650 normal consumes up to 65 Watt, the Ti above 100.
on the other hand, there is the Ati Radeon 7770 which costs nearly the same as the GTX 650 normal, with a bit higher performance.

If you want to stay safe for the future year, you need to get something more than GTX 650, currently I am playing all games from a year ago, nothing new yet that requires quad SLI $4K video cards.

Depeding on your budget and what you want to achieve anything from AMD [HD7850 - HD7870 - HD7950] or NVidia [GTX660 - GTX660 Ti - GTX670] will work greatly.

It might be a good idea to wait for the XMas sales, unless you are in a hurry.

I wouldn't touch anything else. You won't really need more (or faster) RAM 'till you change the whole sistem.

If you really MUST change anything else other than the GPU, pick something that can be passed over to the next system, like an SSD or the monitor (if you are still on an old one).
Otherwise, once you have the new GPU, you are set for another year minimum, most likely two.

dunno what specific kind of psu you have but just make sure it has the power connectors to support the card you buy; i personally had some random 500 w psu that was not modular and just had the bare minimum of power connectors for my old card but i figured I would get a new psu anyway.

You should check the prices out before going for any of the cards recommended in this thread - most people seem to be recommending the 6xx series GPUs but in the UK at least that generation is being phased out and a 660Ti won't really cost you any less than a 760. Also a 7790 competes very favourably with the 650Ti and is around the same price here, ditto for the 7770 and standard 650.