GeForce GTX 650 vs Radeon HD 6750 1GB

Intro

Compare those specifications to the Radeon HD 6750 1GB, which comes with GPU core speed of 725 MHz, and 1024 MB of GDDR5 memory set to run at 1000 MHz through a 128-bit bus. It also is made up of 720 Stream Processors, 36 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
Radeon HD 6750 1GB		86 Watts
	Difference: 22 Watts (34%)

Memory Bandwidth

The GeForce GTX 650 should theoretically be much faster than the Radeon HD 6750 1GB overall. (explain)

GeForce GTX 650		80000 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 16000 (25%)

Texel Rate

The GeForce GTX 650 should be quite a bit (more or less 30%) more effective at texture filtering than the Radeon HD 6750 1GB. (explain)

GeForce GTX 650		33856 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 7756 (30%)

Pixel Rate

The GeForce GTX 650 should be quite a bit (approximately 46%) more effective at full screen anti-aliasing than the Radeon HD 6750 1GB, and able to handle higher screen resolutions better. (explain)

GeForce GTX 650		16928 Mpixels/sec
Radeon HD 6750 1GB		11600 Mpixels/sec
	Difference: 5328 (46%)

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 (counted in megabytes per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the bus width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. 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 texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of 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 colour ROPs by the clock 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 many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.