Upgraded video card, still Video Editing Lag?

I just got AMD Radeon HD 6670 video card and installed it hoping that when video editing on Adobe Priemere 8 the lagging would stop. I have my computer connected by hdmi from computer to 36" samsung tv. It seems to be lagging even more now which is annoying. My Computer Specifications are as follows

- Mother board is an asus P5L-MX..

- CPU is a Pentium D 3.00ghz

- Ram 3.37gb (4gb)

Do u think if i upgraded my processor that it would stop the lagging and make my computer speedy!?? PLEASE HELP|||Typically Upgradeable Laptop Parts

While laptops have a certain number of parts that are custom-made, there are some that aren't and which are usually upgradeable by the end-user. These parts include the hard drive and the RAM (Random Access Memory). Hard drives for laptops come in one standard size (2.5 inches), and you are usually able to access the hard drive on a laptop by removing a few screws on the bottom of the computer. Once the hard drive is removed, you can replace it with a larger one, reinstall your operating system and utilize the increase in size immediately. You can also replace the RAM in your laptop in a similar manner, though sometimes replacing the RAM requires that you remove the keyboard from the laptop to access it. Adding additional RAM can make your laptop run faster; though, beware of trying to install too much RAM in your laptop, as laptop motherboards can only handle a certain amount. This amount varies depending on the make and model of your computer. Check with your computer manufacturer before attempting to add more RAM to your machine.



Typically Non-Upgradeable Laptop Parts

Among the list of laptop parts that are not usually upgradeable unless the manufacturer has explicitly made them so are video cards, CPUs, sound cards and motherboards. These parts are usually custom-designed so that they fit into their particular laptop chassis, so you can't just go out and purchase a standard part and upgrade them. You would have to contact the manufacturer and attempt to purchase these types of parts for your specific laptop model if you wanted to upgrade them. Video cards are more commonly upgradeable than the other parts, however, especially on high-performance gaming machines where the video cards are physically separate from the motherboard instead of being integrated into it.|||Video Editing is mostly CPU powerhouse, and that Pentium D might not be as sufficient as you might have wanted it to be



Option : Upgrade your CPU

- You have a socket 775 which allows you to use only Intel Core 2 series CPUS

- Get a quad core if you do a lot of Video Editing

- Dual core for mild video editing



YES, upgrading your processor will make your computer much faster and may solve much of your lag issues|||...wow. Here's a funny idea: Video editing is not that dependent on your video card. The problem is that your CPU is an old turd, and your video editing is going to be heavily CPU-dependent.|||Upgraded Processor, RAM