GeForce GTX 560 Ti 448 vs Radeon HD 7950 3GB

Intro

Compare those specifications to the Radeon HD 7950 3GB, which has GPU core speed of 800 MHz, and 3072 MB of GDDR5 memory set to run at 1250 MHz through a 384-bit bus. It also is comprised of 1792 Stream Processors, 112 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7950 3GB		200 Watts
GeForce GTX 560 Ti 448		210 Watts
	Difference: 10 Watts (5%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7950 3GB is 67% faster than the GeForce GTX 560 Ti 448 overall, due to its greater bandwidth. (explain)

Radeon HD 7950 3GB		240000 MB/sec
GeForce GTX 560 Ti 448		144000 MB/sec
	Difference: 96000 (67%)

Texel Rate

The Radeon HD 7950 3GB will be quite a bit (about 119%) better at anisotropic filtering than the GeForce GTX 560 Ti 448. (explain)

Radeon HD 7950 3GB		89600 Mtexels/sec
GeForce GTX 560 Ti 448		40992 Mtexels/sec
	Difference: 48608 (119%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 560 Ti 448 is superior to the Radeon HD 7950 3GB, though only just barely. (explain)

GeForce GTX 560 Ti 448		29280 Mpixels/sec
Radeon HD 7950 3GB		25600 Mpixels/sec
	Difference: 3680 (14%)

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: Bandwidth is the max amount of data (in units of megabytes per second) that can be transferred across the external memory interface in a second. It is worked out by multiplying the interface width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total amount 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 applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.