GeForce GTS 250 512MB vs Radeon HD 6750 1GB

Intro

Compare those specs to the Radeon HD 6750 1GB, which has a core clock frequency of 725 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 128-bit memory bus, and uses a 40 nm design. It is comprised of 720 SPUs, 36 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 1GB		86 Watts
GeForce GTS 250 512MB		145 Watts
	Difference: 59 Watts (69%)

Memory Bandwidth

The GeForce GTS 250 512MB should in theory be a small bit faster than the Radeon HD 6750 1GB overall. (explain)

GeForce GTS 250 512MB		70400 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 6400 (10%)

Texel Rate

The GeForce GTS 250 512MB should be quite a bit (more or less 81%) more effective at anisotropic filtering than the Radeon HD 6750 1GB. (explain)

GeForce GTS 250 512MB		47232 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 21132 (81%)

Pixel Rate

The GeForce GTS 250 512MB should be a small bit (about 2%) better at full screen anti-aliasing than the Radeon HD 6750 1GB, and also will be able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTS 250 512MB		11808 Mpixels/sec
Radeon HD 6750 1GB		11600 Mpixels/sec
	Difference: 208 (2%)

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 maximum amount of data (counted in megabytes per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the bus width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 again. If 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 texture map elements (texels) that are processed in one second. This number 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.