GeForce GTX 750 Ti vs Radeon HD 4870 1GB

Intro

Compare those specs to the Radeon HD 4870 1GB, which features GPU core speed of 750 MHz, and 1024 MB of GDDR5 RAM set to run at 900 MHz through a 256-bit bus. It also is comprised of 800(160x5) Stream Processors, 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 1GB		150 Watts
	Difference: 90 Watts (150%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4870 1GB should in theory be quite a bit better than the GeForce GTX 750 Ti overall. (explain)

Radeon HD 4870 1GB		115200 MB/sec
GeForce GTX 750 Ti		86400 MB/sec
	Difference: 28800 (33%)

Texel Rate

The GeForce GTX 750 Ti should be quite a bit (about 36%) better at anisotropic filtering than the Radeon HD 4870 1GB. (explain)

GeForce GTX 750 Ti		40800 Mtexels/sec
Radeon HD 4870 1GB		30000 Mtexels/sec
	Difference: 10800 (36%)

Pixel Rate

The GeForce GTX 750 Ti will be quite a bit (more or less 36%) faster with regards to full screen anti-aliasing than the Radeon HD 4870 1GB, and should be capable of handling higher resolutions more effectively. (explain)

GeForce GTX 750 Ti		16320 Mpixels/sec
Radeon HD 4870 1GB		12000 Mpixels/sec
	Difference: 4320 (36%)

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: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the 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 processed per second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few 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.