GeForce GTX 750 Ti vs Radeon HD 5870

Intro

Compare those specifications to the Radeon HD 5870, which has GPU clock speed of 850 MHz, and 1024 MB of GDDR5 memory set to run at 1200 MHz through a 256-bit bus. It also is comprised of 1600(320x5) Stream Processors, 80 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750 Ti		60 Watts
Radeon HD 5870		188 Watts
	Difference: 128 Watts (213%)

Memory Bandwidth

In theory, the Radeon HD 5870 should be 78% faster than the GeForce GTX 750 Ti in general, because of its higher data rate. (explain)

Radeon HD 5870		153600 MB/sec
GeForce GTX 750 Ti		86400 MB/sec
	Difference: 67200 (78%)

Texel Rate

The Radeon HD 5870 should be much (approximately 67%) better at texture filtering than the GeForce GTX 750 Ti. (explain)

Radeon HD 5870		68000 Mtexels/sec
GeForce GTX 750 Ti		40800 Mtexels/sec
	Difference: 27200 (67%)

Pixel Rate

The Radeon HD 5870 will be quite a bit (more or less 67%) better at full screen anti-aliasing than the GeForce GTX 750 Ti, and also will be able to handle higher screen resolutions more effectively. (explain)

Radeon HD 5870		27200 Mpixels/sec
GeForce GTX 750 Ti		16320 Mpixels/sec
	Difference: 10880 (67%)

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 (measured in megabytes per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total texture units by the core clock 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines 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 fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.