Radeon HD 6450 (OEM) 1GB vs Radeon HD 6970

Intro

Compare those specs to the Radeon HD 6970, which features a GPU core clock speed of 880 MHz, and 2048 MB of GDDR5 RAM set to run at 1375 MHz through a 256-bit bus. It also features 1536 Stream Processors, 96 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 1GB		31 Watts
Radeon HD 6970		250 Watts
	Difference: 219 Watts (706%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6970 should theoretically be a lot superior to the Radeon HD 6450 (OEM) 1GB overall. (explain)

Radeon HD 6970		176000 MB/sec
Radeon HD 6450 (OEM) 1GB		28800 MB/sec
	Difference: 147200 (511%)

Texel Rate

The Radeon HD 6970 will be much (approximately 1308%) better at anisotropic filtering than the Radeon HD 6450 (OEM) 1GB. (explain)

Radeon HD 6970		84480 Mtexels/sec
Radeon HD 6450 (OEM) 1GB		6000 Mtexels/sec
	Difference: 78480 (1308%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 6970 is a better choice, and very much so. (explain)

Radeon HD 6970		28160 Mpixels/sec
Radeon HD 6450 (OEM) 1GB		3000 Mpixels/sec
	Difference: 25160 (839%)

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 data (measured in megabytes per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.