GeForce GTX 280 vs Radeon HD 6450 (OEM)

Intro

Compare those specs to the Radeon HD 6450 (OEM), which has a core clock speed of 625 MHz and a GDDR3 memory speed of 800 MHz. It also uses a 64-bit bus, and uses a 40 nm design. It is comprised of 160 SPUs, 8 TAUs, and 4 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM)		31 Watts
GeForce GTX 280		236 Watts
	Difference: 205 Watts (661%)

Memory Bandwidth

In theory, the GeForce GTX 280 will be 1007% quicker than the Radeon HD 6450 (OEM) in general, because of its greater data rate. (explain)

GeForce GTX 280		141696 MB/sec
Radeon HD 6450 (OEM)		12800 MB/sec
	Difference: 128896 (1007%)

Texel Rate

The GeForce GTX 280 will be a lot (more or less 863%) more effective at texture filtering than the Radeon HD 6450 (OEM). (explain)

GeForce GTX 280		48160 Mtexels/sec
Radeon HD 6450 (OEM)		5000 Mtexels/sec
	Difference: 43160 (863%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 280 is the winner, by a large margin. (explain)

GeForce GTX 280		19264 Mpixels/sec
Radeon HD 6450 (OEM)		2500 Mpixels/sec
	Difference: 16764 (671%)

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 (measured in MB per second) that can be transported past the external memory interface within a second. It is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher 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 amount of texture map elements (texels) that are applied per second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

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