GeForce GTX 750 Ti vs Radeon HD 4870 X2

Intro

Compare those specifications to the Radeon HD 4870 X2, which comes with a clock frequency of 750 MHz and a GDDR5 memory speed of 900 MHz. It also features a 256-bit memory bus, and makes use of a 55 nm design. It is made up of 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750 Ti		60 Watts
Radeon HD 4870 X2		350 Watts
	Difference: 290 Watts (483%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4870 X2 should theoretically be a lot superior to the GeForce GTX 750 Ti overall. (explain)

Radeon HD 4870 X2		230400 MB/sec
GeForce GTX 750 Ti		86400 MB/sec
	Difference: 144000 (167%)

Texel Rate

The Radeon HD 4870 X2 should be quite a bit (more or less 47%) better at AF than the GeForce GTX 750 Ti. (explain)

Radeon HD 4870 X2		60000 Mtexels/sec
GeForce GTX 750 Ti		40800 Mtexels/sec
	Difference: 19200 (47%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 4870 X2 is a better choice, by far. (explain)

Radeon HD 4870 X2		24000 Mpixels/sec
GeForce GTX 750 Ti		16320 Mpixels/sec
	Difference: 7680 (47%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of data (counted in MB per second) that can be moved over the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory speed. If it uses DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range 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 figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.