GeForce GTX 780 Ti vs Radeon HD 7950 3GB

Intro

Compare those specs to the Radeon HD 7950 3GB, which uses a 28 nm design. AMD has set the core frequency at 800 MHz. The GDDR5 memory works at a frequency of 1250 MHz on this particular model. It features 1792 SPUs as well as 112 TAUs and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7950 3GB		200 Watts
GeForce GTX 780 Ti		250 Watts
	Difference: 50 Watts (25%)

Memory Bandwidth

The GeForce GTX 780 Ti should theoretically be quite a bit faster than the Radeon HD 7950 3GB in general. (explain)

GeForce GTX 780 Ti		336000 MB/sec
Radeon HD 7950 3GB		240000 MB/sec
	Difference: 96000 (40%)

Texel Rate

The GeForce GTX 780 Ti should be much (approximately 134%) more effective at anisotropic filtering than the Radeon HD 7950 3GB. (explain)

GeForce GTX 780 Ti		210000 Mtexels/sec
Radeon HD 7950 3GB		89600 Mtexels/sec
	Difference: 120400 (134%)

Pixel Rate

The GeForce GTX 780 Ti should be a lot (approximately 64%) better at AA than the Radeon HD 7950 3GB, and able to handle higher resolutions better. (explain)

GeForce GTX 780 Ti		42000 Mpixels/sec
Radeon HD 7950 3GB		25600 Mpixels/sec
	Difference: 16400 (64%)

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 MB per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's 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 amount of texture map elements (texels) that are processed in one second. This number 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.