The 3450 is AMD's mainstream (read very low-end) discrete graphics card. The integrated graphics on the 780G chipset is based upon last year's HD2400 card and has very similar specifications. Here's a chart describing the differences between the HD3200 and HD3450 card that AMD sent with their new chipset:
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Specifications
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HD3200
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HD3450
|
|
Clock speed
|
500MHz
|
600MHz
|
|
Memory Clock
|
500MHz
|
400MHz
|
|
Process
|
55 nanometer
|
55 nanometer
|
|
Unified Shaders
|
40
|
40
|
|
DirectX 10 Shader Model
|
4.0
|
4.1
|
|
Memory Bus
|
32-bit
|
64-bit
|
|
ROPs
|
4
|
4
|
HD3450
HD3200 Specs
As you can see with the key differences are the higher memory clock speed on the HD3200, support for DirectX 10.1 on the 3450 and a higher memory bus, offering higher memory bandwidth on the HD3450. DX 10.1 is a checkbox feature on the 3450 as it is targeted for the very low end of the discrete market and doesn't offer the high performance to run DX10 games with max settings.
