GeForce GTS 450 1GB vs Radeon HD 5750 1GB

Intro

Compare those specs to the Radeon HD 5750 1GB, which comes with a clock speed of 700 MHz and a GDDR5 memory frequency of 1150 MHz. It also uses a 128-bit memory bus, and makes use of a 40 nm design. It features 720(144x5) SPUs, 36 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 1GB		86 Watts
GeForce GTS 450 1GB		106 Watts
	Difference: 20 Watts (23%)

Memory Bandwidth

Performance-wise, the Radeon HD 5750 1GB should in theory be a lot superior to the GeForce GTS 450 1GB overall. (explain)

Radeon HD 5750 1GB		73600 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 15872 (27%)

Texel Rate

The Radeon HD 5750 1GB should be a little bit (more or less 1%) more effective at texture filtering than the GeForce GTS 450 1GB. (explain)

Radeon HD 5750 1GB		25200 Mtexels/sec
GeForce GTS 450 1GB		25056 Mtexels/sec
	Difference: 144 (1%)

Pixel Rate

The GeForce GTS 450 1GB will be just a bit (about 12%) better at FSAA than the Radeon HD 5750 1GB, and also will be capable of handling higher screen resolutions while still performing well. (explain)

GeForce GTS 450 1GB		12528 Mpixels/sec
Radeon HD 5750 1GB		11200 Mpixels/sec
	Difference: 1328 (12%)

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 maximum amount of information (measured in megabytes per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster 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 applied in one second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.