Geforce GTX 780 vs Radeon HD 6750 1GB

Intro

Compare those specs to the Radeon HD 6750 1GB, which uses a 40 nm design. AMD has clocked the core speed at 725 MHz. The GDDR5 RAM is set to run at a frequency of 1000 MHz on this particular card. It features 720 SPUs along with 36 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 1GB		86 Watts
Geforce GTX 780		250 Watts
	Difference: 164 Watts (191%)

Memory Bandwidth

The Geforce GTX 780, in theory, should perform a lot faster than the Radeon HD 6750 1GB in general. (explain)

Geforce GTX 780		288384 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 224384 (351%)

Texel Rate

The Geforce GTX 780 should be a lot (approximately 535%) faster with regards to AF than the Radeon HD 6750 1GB. (explain)

Geforce GTX 780		165696 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 139596 (535%)

Pixel Rate

The Geforce GTX 780 will be quite a bit (approximately 257%) faster with regards to FSAA than the Radeon HD 6750 1GB, and capable of handling higher screen resolutions while still performing well. (explain)

Geforce GTX 780		41424 Mpixels/sec
Radeon HD 6750 1GB		11600 Mpixels/sec
	Difference: 29824 (257%)

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 (measured in megabytes per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the video 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 number of pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.