you get a program online that can overclock gpus if its a nvidia car their website has a program that overclocks gpus and also allows for fan speed and other settings to be monitored
There is no way to improve the speed of your graphics card, unless you overclock the card, which I do not recommend. Your best option will be to buy a new graphics card, you can get a top of the lineATI Radeon HD 4670 1GB GDDR3 PCI-E Video Card for $139.99 CND or PNY - NVIDIA GeForce 9800 GT 1GB GDDR3 PCI Express Graphics Card $109.99 US. You can't go wrong with either one of these, just make sure that your computer can hold these cards.
What you need to be compatible with a new graphics card depends on the card and the computer and operating system.
According to the Apple website, the new IMAC has an all-new quad core processor, which makes it 1.7 times faster. It has advanced graphics and ultrafast thunderbolt technology.
configure the application to run correctly with the new graphics card
Get a new motherboard or a new graphics card.
I would not bother trying to overclock a laptop graphics card because of the limited ventilation that laptops have. You would risk overheating the laptop and damaging it for a negligible gain in performance.Some laptops have decent cooling however. Especially if you have the technical skill to apply new thermal paste, you may be able to get some better performance out of it.You can use a program called MSI afterburner. Its free and pretty cool. Step 1 MONITOR YOUR TEMPERATURES. DO NOT LET THEM EXCEED 80c!!We are not responsible for any damages to you your machine or etc...
Either because you need a new graphics card and your graphics are set on low resolution
get a new graphics card
Here is a good article on using of Graphics Card,http://boddunan.com/component/content/article/37-new-technologies/3743-graphics-card.html?directory=3
buy a new laptop
No, you do not
Buy a Graphics card/New comp with the card or your game will suck/be impossible to play