GeForce GTX 650 Ti vs Radeon HD 6950 2GB

Intro

Compare those specifications to the Radeon HD 6950 2GB, which uses a 40 nm design. AMD has clocked the core frequency at 800 MHz. The GDDR5 memory is set to run at a frequency of 1250 MHz on this specific card. It features 1408 SPUs as well as 88 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 Ti		110 Watts
Radeon HD 6950 2GB		200 Watts
	Difference: 90 Watts (82%)

Memory Bandwidth

In theory, the Radeon HD 6950 2GB should be much faster than the GeForce GTX 650 Ti overall. (explain)

Radeon HD 6950 2GB		160000 MB/sec
GeForce GTX 650 Ti		86400 MB/sec
	Difference: 73600 (85%)

Texel Rate

The Radeon HD 6950 2GB should be a bit (approximately 19%) faster with regards to AF than the GeForce GTX 650 Ti. (explain)

Radeon HD 6950 2GB		70400 Mtexels/sec
GeForce GTX 650 Ti		59392 Mtexels/sec
	Difference: 11008 (19%)

Pixel Rate

The Radeon HD 6950 2GB should be quite a bit (approximately 72%) better at anti-aliasing than the GeForce GTX 650 Ti, and also should be able to handle higher screen resolutions more effectively. (explain)

Radeon HD 6950 2GB		25600 Mpixels/sec
GeForce GTX 650 Ti		14848 Mpixels/sec
	Difference: 10752 (72%)

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 largest amount of data (in units of MB per second) that can be transferred across the external memory interface in a second. The number is worked out by multiplying the interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the card will be at 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 chip can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.