GeForce GTS 250 512MB vs Radeon HD 7750

Intro

Compare those specs to the Radeon HD 7750, which comes with a core clock frequency of 800 MHz and a GDDR5 memory frequency of 1125 MHz. It also uses a 128-bit bus, and uses a 28 nm design. It is made up of 512 SPUs, 32 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
GeForce GTS 250 512MB		145 Watts
	Difference: 90 Watts (164%)

Memory Bandwidth

In theory, the Radeon HD 7750 should be 2% quicker than the GeForce GTS 250 512MB in general, because of its higher data rate. (explain)

Radeon HD 7750		72000 MB/sec
GeForce GTS 250 512MB		70400 MB/sec
	Difference: 1600 (2%)

Texel Rate

The GeForce GTS 250 512MB is much (approximately 85%) better at texture filtering than the Radeon HD 7750. (explain)

GeForce GTS 250 512MB		47232 Mtexels/sec
Radeon HD 7750		25600 Mtexels/sec
	Difference: 21632 (85%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 7750 is a better choice, but only just. (explain)

Radeon HD 7750		12800 Mpixels/sec
GeForce GTS 250 512MB		11808 Mpixels/sec
	Difference: 992 (8%)

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 (measured in MB per second) that can be moved over the external memory interface in a second. It is worked out by multiplying the interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called 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, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.