Nvidia Titan X vs Radeon HD 4890 2GB

Intro

Compare those specs to the Radeon HD 4890 2GB, which has a GPU core clock speed of 1000 MHz, and 2048 MB of GDDR5 RAM running at 975 MHz through a 256-bit bus. It also is comprised of 800(160x5) Stream Processors, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4890 2GB		190 Watts
Nvidia Titan X		250 Watts
	Difference: 60 Watts (32%)

Memory Bandwidth

As far as performance goes, the Nvidia Titan X should theoretically be much superior to the Radeon HD 4890 2GB overall. (explain)

Nvidia Titan X		491520 MB/sec
Radeon HD 4890 2GB		124800 MB/sec
	Difference: 366720 (294%)

Texel Rate

The Nvidia Titan X will be a lot (approximately 694%) better at anisotropic filtering than the Radeon HD 4890 2GB. (explain)

Nvidia Titan X		317408 Mtexels/sec
Radeon HD 4890 2GB		40000 Mtexels/sec
	Difference: 277408 (694%)

Pixel Rate

The Nvidia Titan X should be a lot (approximately 750%) more effective at AA than the Radeon HD 4890 2GB, and also able to handle higher screen resolutions more effectively. (explain)

Nvidia Titan X		136032 Mpixels/sec
Radeon HD 4890 2GB		16000 Mpixels/sec
	Difference: 120032 (750%)

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 max amount of information (counted in MB per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the bus width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the 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 texture map elements (texels) that are applied in one second. This is calculated by multiplying the total amount of texture units by the core clock 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 in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.