GeForce GTX 650 vs Radeon HD 6750

Intro

Compare all that to the Radeon HD 6750, which uses a 40 nm design. AMD has set the core speed at 725 MHz. The GDDR5 RAM works at a frequency of 1000 MHz on this particular model. It features 720 SPUs along with 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

In theory, the GeForce GTX 650 will be 25% quicker than the Radeon HD 6750 overall, because of its higher data rate. (explain)

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

Texel Rate

The GeForce GTX 650 will be quite a bit (about 30%) faster with regards to 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

If running with a high resolution is important to you, then the GeForce GTX 650 is superior to the Radeon HD 6750, and very much so. (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 largest amount of data (measured in megabytes per second) that can be moved over the external memory interface in one second. The number is calculated by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total 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 in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.