Well there is a graphics card forum here for a reason...don't go making a new thread though
You need to look into overclocking your cpu....try using clockgen or setfsb and look at some guides...your processor is very very "bad" at its stock speed for gta iv...and if you looked at benchmarks you would have known your pcs "graphics card" is ***....
Since your monitor is 1680x1050 i would recommend either a GTX 260 or GTX 275....you should probably sitck to the 260....you WILL need to buy a new power supply as well since your stock psu can't handle the new card and its requirements
overclocking, more details? whats clockgen. and im not looking for vamping up my pc for gaming, i just want something that would make gta iv play better with less lag and graphics, i checked the benchmarks. and when i checked canyourunit.com it said its runable. also i dont think changing my processor is needed. and if i change it what would happen. nothing much.
yeah i know i need a new power supply as mine is bad i never thought i needed it. i was thinking of playing gta iv on low also on the other forum i posted if u check under the ( cheapest ) graphic card the guy posted it says it uses minimal power so i might not have to change it . im not a tech savvy so i dont know much but i would like the graphic card under 100 $ and power supply just something that runs everything ( remeber i just want to run gta iv without having to redo my computer just for a game. i thought i would just need to change the graphic card and supply power. i still dont understand overclocking and not sure why my processor is bad.
( please just keep in mind i just want to run the game without paying a ton, )
im not sure how much a average power supply costs or graphic card so i cant really give u a budget but i would like around 100$ and down for graphic card and probably about the same for the power supply
Also please do not advise people to overclock if they've never done it before... Quad 2 Core 6600 its an ok CPU, its the game code that sucks arse. It's a poor console transfer. You should look into switching your GPU to either GTX260 or ATI 4870. They are priced out competitively so you can get a good deal.
CPU overclocking requires a bit more skills, and probably new components for you, which means more money. You PC probably has an HP OEM mobo so it will give you poor OCing results, than YOu'll have to buy a new PSU and a new heatsink.... so if you look at overall pricing you are better of with buying new CPU.
Getting back to the original question. YOu will be able to play GTA IV with just getting a better Video Card, your settings wont be maxed out but you will have a playable frame rate.
For $100 You should look for HD4770 video card if You can find one. It also uses only 80W of power so You should be able to get away with Your old PSU. Don't expect to play maxed out but You will be able to get decent quality settings and performance.
Also it could be Your memory is running on single channel because it is 3GB so You might want to upgrade to 4GB and run dual channel.