I have the following:

Processor: AMD A10-5800K APU with AMD Radeon HD 7660D
http://shop.amd.com/us/All/Detail/Processor/AD580KWOHJBOX

Mainboard: Asus A55BM-Plus
http://www.asus.com/us/Motherboards/A55BMPLUSCSM/

Video Card: Nvidia Geforce Galaxy GT610 GC 2GB DDR3 64bit
http://www.galaxytech.com/EN_GB/Product2/ProductDetail?proID=30

I have not added the video card to the desktop since this processor has discrete GPU technology built in and the board has GPU boost when using an AMD A Series processor.

Should I add the video card? I would love to hear what people more knowledgeable than me on the subject have to offer.

Thanks in advance,
SysopChris.

Adding a video card will certainly improve the overall graphics performance. But the A10-5800K leaves you with a processor that has the ability to process both system and graphics. Add the GT610 for sure, but consider switching your A10 to an AMD FX series processor, which is a dedicated CPU; that will ensure you are getting the most performance from your system.

The AMD 7660 is a very capable chip set. Myself, I prefer the nVidia gear, but it may be overkill for your needs unless you have some requirements for the nVidia GPU math co-processor acceleration for scientific/engineering purposes.

Thanks for the info. Before I put the card in I wonder if you can suggest a good free benchmarking tool I can use for a before/after test?

There is a GPU boos switch on the mainboard and GPU boost settings in the BIOS. Do I need to turn theese off when I start using the Geforce card? Here's what the box says.
"Exclusive GPU Boost is able to unlock anu APU for overclocking integrated graphics. Even non-Black Edition APU's can be boosted up to 30%"
Is this only for processors with Discrete GPU technology built-in?

If it helps I will attach my dxdiag.txt results and Belarc results here.

Thanks again for taking the time to help,
Chris.