GeForce GTS 250 512MB vs Radeon HD 5750 512MB

Intro

Compare all that to the Radeon HD 5750 512MB, which uses a 40 nm design. AMD has clocked the core frequency at 700 MHz. The GDDR5 memory runs at a frequency of 1150 MHz on this particular model. It features 720(144x5) SPUs as well as 36 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 512MB		86 Watts
GeForce GTS 250 512MB		145 Watts
	Difference: 59 Watts (69%)

Memory Bandwidth

In theory, the Radeon HD 5750 512MB is 5% quicker than the GeForce GTS 250 512MB in general, due to its higher data rate. (explain)

Radeon HD 5750 512MB		73600 MB/sec
GeForce GTS 250 512MB		70400 MB/sec
	Difference: 3200 (5%)

Texel Rate

The GeForce GTS 250 512MB is much (more or less 87%) faster with regards to AF than the Radeon HD 5750 512MB. (explain)

GeForce GTS 250 512MB		47232 Mtexels/sec
Radeon HD 5750 512MB		25200 Mtexels/sec
	Difference: 22032 (87%)

Pixel Rate

The GeForce GTS 250 512MB is a little bit (about 5%) better at AA than the Radeon HD 5750 512MB, and able to handle higher resolutions more effectively. (explain)

GeForce GTS 250 512MB		11808 Mpixels/sec
Radeon HD 5750 512MB		11200 Mpixels/sec
	Difference: 608 (5%)

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 past the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total number of texture units 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 applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka 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 bandwidth is, the lower the potential to reach the max fill rate.