GeForce GTX 275 vs Radeon HD 6450 (OEM) 1GB

Intro

Compare all that to the Radeon HD 6450 (OEM) 1GB, which has a GPU core clock speed of 750 MHz, and 1024 MB of GDDR5 memory running at 900 MHz through a 64-bit bus. It also is made up of 160 Stream Processors, 8 Texture Address Units, and 4 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
GeForce GTX 275		219 Watts
	Difference: 188 Watts (606%)

Memory Bandwidth

In theory, the GeForce GTX 275 will be 341% faster than the Radeon HD 6450 (OEM) 1GB in general, due to its higher data rate. (explain)

GeForce GTX 275		127008 MB/sec
Radeon HD 6450 (OEM) 1GB		28800 MB/sec
	Difference: 98208 (341%)

Texel Rate

The GeForce GTX 275 should be quite a bit (approximately 744%) more effective at anisotropic filtering than the Radeon HD 6450 (OEM) 1GB. (explain)

GeForce GTX 275		50640 Mtexels/sec
Radeon HD 6450 (OEM) 1GB		6000 Mtexels/sec
	Difference: 44640 (744%)

Pixel Rate

The GeForce GTX 275 will be much (more or less 491%) better at FSAA than the Radeon HD 6450 (OEM) 1GB, and should be able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 275		17724 Mpixels/sec
Radeon HD 6450 (OEM) 1GB		3000 Mpixels/sec
	Difference: 14724 (491%)

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 max amount of information (counted in megabytes per second) that can be moved over the external memory interface within a second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs 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 output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.