GeForce GTX Titan Black vs Radeon HD 4870 1GB

Intro

Compare all of that to the Radeon HD 4870 1GB, which comes with core clock speeds of 750 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR5 RAM. It features 800(160x5) SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4870 1GB		150 Watts
GeForce GTX Titan Black		250 Watts
	Difference: 100 Watts (67%)

Memory Bandwidth

Theoretically, the GeForce GTX Titan Black should be much faster than the Radeon HD 4870 1GB overall. (explain)

GeForce GTX Titan Black		336000 MB/sec
Radeon HD 4870 1GB		115200 MB/sec
	Difference: 220800 (192%)

Texel Rate

The GeForce GTX Titan Black is much (approximately 611%) better at texture filtering than the Radeon HD 4870 1GB. (explain)

GeForce GTX Titan Black		213360 Mtexels/sec
Radeon HD 4870 1GB		30000 Mtexels/sec
	Difference: 183360 (611%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX Titan Black is superior to the Radeon HD 4870 1GB, and very much so. (explain)

GeForce GTX Titan Black		42672 Mpixels/sec
Radeon HD 4870 1GB		12000 Mpixels/sec
	Difference: 30672 (256%)

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 data (in units of megabytes per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the interface width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher 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 amount of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core 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 also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.