1) You have a PCI Express x16 expansion slot, for a graphics card.http://www.newegg.com/Product/Product.aspx?Item=N82E16813135010
A) 1GigaByte of graphics memory which is GDDR3. (It is GDDR3, not DDR3; trust me)
B) 800MegaHertz Core Clock
C) 1600MHz Memory Clock
D) API's - DirectX 11
Open GL 4.1
Shader Model 5.0
2) The motherboard chipset is an Nvidia GeForce 6100 - Northbridge, and an Nvidia nForce 410 - Southbridge.http://en.wikipedia.org/wiki/GeForce_6_Series#GeForce_6100_and_6150_series_chip_specificationshttp://en.wikipedia.org/wiki/Comparison_of_Nvidia_graphics_processing_units#GeForce_6_.286xxx.29_series
Nvidia GeForce 6100/nForce 410, came out 2005.
The Northbridge chip of the motherboard chipset, handles the Faster capabilities of a computer.
Processor (CPU), Ram Memory, and HIGH-speed graphics.
AGP technology, and PCI Express technology, ARE HIGH-speed graphics.
Using a PCI slot for a graphics card, or using Integrated Graphics; is NOT high speed graphics.
(As you can see in the Motherboard Diagram, the PCI bus is controlled by the Southbridge chip. The Southbridge chip handles the Slower capabilities of a computer.
Means anything connected to the PCI bus, such as a graphics card in a PCI expansion slot; is handled by the Southbridge chip.
Integrated graphics also )
4) PCI Express came out 2004.
Went from PCI Express 1.0 version to PCI Express 1.1 version.
In 2007 PCI Express went to the 2.0 version. PCI Express 2.0.
Your motherboard, IMHO, uses the PCI Express 1.1 technology.
This is why I recommend a graphics card based on the PCI Express 2.0 technology. (For one)
PCI Express 2.0 is Backward Compatible, with PCI Express 1.1
A little iffy if it's PCI Express 1.0
I have seen a lot of problems crop up with users trying to use a graphics card, based on the PCI Express 2.1 technology; on a motherboard based on the PCI Express 2.1 technology.
That's why I recommended PCI Express 2.0
PCI Express 3.0 is supposed to overcome that, (Use on a mobo with PCI-E 1.1), but I have no real world knowledge, (Hands on), and no input from the 'outside'. (Internet/world)
5) You need at least a 400 Watt power supply. Don't have at least a 400 Watt? Time to move up.http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=1147669&Sku=U12-41529