GeForce GTS 250 512MB vs Radeon HD 6750

Intro

Compare those specs to the Radeon HD 6750, which comes with a 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 made up of 720 SPUs, 36 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Performance-wise, the GeForce GTS 250 512MB should in theory be a little bit better than the Radeon HD 6750 in general. (explain)

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

Texel Rate

The GeForce GTS 250 512MB should be a lot (about 81%) faster with regards to anisotropic filtering than the Radeon HD 6750. (explain)

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

Pixel Rate

The GeForce GTS 250 512MB will be a small bit (about 2%) faster with regards to anti-aliasing than the Radeon HD 6750, and also capable of handling higher screen resolutions while still performing well. (explain)

GeForce GTS 250 512MB		11808 Mpixels/sec
Radeon HD 6750		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 largest amount of information (counted in MB per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the interface width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the 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 the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.