Geforce GTX 780 vs Radeon HD 6950 2GB

Intro

Compare those specifications to the Radeon HD 6950 2GB, which comes with a GPU core clock speed of 800 MHz, and 2048 MB of GDDR5 memory running at 1250 MHz through a 256-bit bus. It also features 1408 Stream Processors, 88 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6950 2GB		200 Watts
Geforce GTX 780		250 Watts
	Difference: 50 Watts (25%)

Memory Bandwidth

In theory, the Geforce GTX 780 is 80% quicker than the Radeon HD 6950 2GB in general, due to its greater bandwidth. (explain)

Geforce GTX 780		288384 MB/sec
Radeon HD 6950 2GB		160000 MB/sec
	Difference: 128384 (80%)

Texel Rate

The Geforce GTX 780 should be much (about 135%) faster with regards to anisotropic filtering than the Radeon HD 6950 2GB. (explain)

Geforce GTX 780		165696 Mtexels/sec
Radeon HD 6950 2GB		70400 Mtexels/sec
	Difference: 95296 (135%)

Pixel Rate

The Geforce GTX 780 should be a lot (approximately 62%) faster with regards to AA than the Radeon HD 6950 2GB, and should be capable of handling higher screen resolutions better. (explain)

Geforce GTX 780		41424 Mpixels/sec
Radeon HD 6950 2GB		25600 Mpixels/sec
	Difference: 15824 (62%)

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 maximum amount of information (in units of MB per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the video 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 number of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units 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 is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.