GeForce GTX Titan Black vs Radeon HD 4870 X2

Intro

Compare those specifications to the Radeon HD 4870 X2, which features core speeds of 750 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR5 memory. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX Titan Black		250 Watts
Radeon HD 4870 X2		350 Watts
	Difference: 100 Watts (40%)

Memory Bandwidth

The GeForce GTX Titan Black, in theory, should be a lot faster than the Radeon HD 4870 X2 in general. (explain)

GeForce GTX Titan Black		336000 MB/sec
Radeon HD 4870 X2		230400 MB/sec
	Difference: 105600 (46%)

Texel Rate

The GeForce GTX Titan Black should be a lot (more or less 256%) better at AF than the Radeon HD 4870 X2. (explain)

GeForce GTX Titan Black		213360 Mtexels/sec
Radeon HD 4870 X2		60000 Mtexels/sec
	Difference: 153360 (256%)

Pixel Rate

The GeForce GTX Titan Black should be much (about 78%) faster with regards to full screen anti-aliasing than the Radeon HD 4870 X2, and will be able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX Titan Black		42672 Mpixels/sec
Radeon HD 4870 X2		24000 Mpixels/sec
	Difference: 18672 (78%)

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 largest amount of data (measured in MB per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.