GeForce GTS 250 1GB vs Radeon HD 5670

Intro

Compare that to the Radeon HD 5670, which uses a 40 nm design. AMD has set the core frequency at 775 MHz. The GDDR5 RAM works at a frequency of 1000 MHz on this particular model. It features 400(80x5) SPUs as well as 20 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670		61 Watts
GeForce GTS 250 1GB		145 Watts
	Difference: 84 Watts (138%)

Memory Bandwidth

The GeForce GTS 250 1GB should theoretically be a little bit faster than the Radeon HD 5670 in general. (explain)

GeForce GTS 250 1GB		70400 MB/sec
Radeon HD 5670		64000 MB/sec
	Difference: 6400 (10%)

Texel Rate

The GeForce GTS 250 1GB should be quite a bit (approximately 205%) more effective at texture filtering than the Radeon HD 5670. (explain)

GeForce GTS 250 1GB		47232 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 31732 (205%)

Pixel Rate

The GeForce GTS 250 1GB will be quite a bit (more or less 90%) more effective at FSAA than the Radeon HD 5670, and capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTS 250 1GB		11808 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 5608 (90%)

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: Bandwidth is the largest amount of information (counted in MB per second) that can be transported over the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 processed in one second. This is calculated by multiplying the total texture units of the card by the core 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.