GeForce GTX 650 vs Radeon HD 6750

Intro

Compare all that to the Radeon HD 6750, which features GPU clock speed of 725 MHz, and 512 MB of GDDR5 memory running at 1000 MHz through a 128-bit bus. It also features 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		86 Watts
	Difference: 22 Watts (34%)

Memory Bandwidth

The GeForce GTX 650, in theory, should be much faster than the Radeon HD 6750 in general. (explain)

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

Texel Rate

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

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

Pixel Rate

The GeForce GTX 650 is a lot (about 46%) more effective at full screen anti-aliasing than the Radeon HD 6750, and capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 650		16928 Mpixels/sec
Radeon HD 6750		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: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher 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 texture map elements (texels) that are processed per second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.