Radeon HD 3690/3830 vs Radeon HD 6450 (OEM)

Intro

Compare those specifications to the Radeon HD 6450 (OEM), which makes use of a 40 nm design. AMD has set the core speed at 625 MHz. The GDDR3 memory runs at a speed of 800 MHz on this card. It features 160 SPUs along with 8 Texture Address Units and 4 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM)		31 Watts
Radeon HD 3690/3830		75 Watts
	Difference: 44 Watts (142%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 3690/3830 should perform a lot faster than the Radeon HD 6450 (OEM) overall. (explain)

Radeon HD 3690/3830		26496 MB/sec
Radeon HD 6450 (OEM)		12800 MB/sec
	Difference: 13696 (107%)

Texel Rate

The Radeon HD 3690/3830 will be a lot (approximately 114%) faster with regards to texture filtering than the Radeon HD 6450 (OEM). (explain)

Radeon HD 3690/3830		10688 Mtexels/sec
Radeon HD 6450 (OEM)		5000 Mtexels/sec
	Difference: 5688 (114%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 3690/3830 is superior to the Radeon HD 6450 (OEM), by a large margin. (explain)

Radeon HD 3690/3830		10688 Mpixels/sec
Radeon HD 6450 (OEM)		2500 Mpixels/sec
	Difference: 8188 (328%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.