GeForce GTX 750 Ti vs Radeon HD 4870 X2

Intro

Compare those specifications to the Radeon HD 4870 X2, which features GPU core speed of 750 MHz, and 1024 MB of GDDR5 RAM running at 900 MHz through a 256-bit bus. It also features 800(160x5) SPUs, 40 TAUs, 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

The Radeon HD 4870 X2, in theory, should perform quite a bit faster than the GeForce GTX 750 Ti in general. (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 much (more or less 47%) more effective at texture filtering 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 using a high screen resolution is important to you, then the Radeon HD 4870 X2 is the winner, and very much so. (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: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the interface width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core speed of the card. 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 also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.