GeForce GTX 750 vs Radeon HD 7950 3GB

Intro

Compare that to the Radeon HD 7950 3GB, which comes with a core clock speed of 800 MHz and a GDDR5 memory speed of 1250 MHz. It also makes use of a 384-bit memory bus, and uses a 28 nm design. It is comprised of 1792 SPUs, 112 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750		55 Watts
Radeon HD 7950 3GB		200 Watts
	Difference: 145 Watts (264%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7950 3GB is 200% faster than the GeForce GTX 750 overall, because of its higher bandwidth. (explain)

Radeon HD 7950 3GB		240000 MB/sec
GeForce GTX 750		80000 MB/sec
	Difference: 160000 (200%)

Texel Rate

The Radeon HD 7950 3GB should be quite a bit (approximately 175%) more effective at anisotropic filtering than the GeForce GTX 750. (explain)

Radeon HD 7950 3GB		89600 Mtexels/sec
GeForce GTX 750		32640 Mtexels/sec
	Difference: 56960 (175%)

Pixel Rate

The Radeon HD 7950 3GB will be quite a bit (more or less 57%) more effective at FSAA than the GeForce GTX 750, and will be able to handle higher resolutions without slowing down too much. (explain)

Radeon HD 7950 3GB		25600 Mpixels/sec
GeForce GTX 750		16320 Mpixels/sec
	Difference: 9280 (57%)

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 maximum amount of information (counted in MB per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out 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 filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.