GeForce GTX 660 Ti vs Radeon HD 6750

Intro

Compare all that to the Radeon HD 6750, which features GPU core speed of 725 MHz, and 512 MB of GDDR5 memory set to run at 1000 MHz through a 128-bit bus. It also is made up of 720 SPUs, 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		86 Watts
GeForce GTX 660 Ti		150 Watts
	Difference: 64 Watts (74%)

Memory Bandwidth

The GeForce GTX 660 Ti, in theory, should be a lot faster than the Radeon HD 6750 overall. (explain)

GeForce GTX 660 Ti		144000 MB/sec
Radeon HD 6750		64000 MB/sec
	Difference: 80000 (125%)

Texel Rate

The GeForce GTX 660 Ti will be quite a bit (more or less 293%) more effective at texture filtering than the Radeon HD 6750. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
Radeon HD 6750		26100 Mtexels/sec
	Difference: 76380 (293%)

Pixel Rate

The GeForce GTX 660 Ti will be quite a bit (more or less 89%) faster with regards to FSAA than the Radeon HD 6750, and also should be able to handle higher screen resolutions better. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
Radeon HD 6750		11600 Mpixels/sec
	Difference: 10360 (89%)

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 largest amount of information (counted in megabytes per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the bus width by its memory clock 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum number 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 clock 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 applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.