GeForce GTX 750 vs Radeon HD 7950 3GB

Intro

Compare those specs to the Radeon HD 7950 3GB, which features core speeds of 800 MHz on the GPU, and 1250 MHz on the 3072 MB of GDDR5 RAM. It features 1792 SPUs as well as 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

Performance-wise, the Radeon HD 7950 3GB should in theory be quite a bit better than the GeForce GTX 750 in general. (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 (about 175%) faster with regards to AF 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 is a lot (more or less 57%) more effective at FSAA than the GeForce GTX 750, and should be capable of handling higher resolutions without losing too much performance. (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: Bandwidth is the max amount of data (measured in megabytes per second) that can be moved past the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. 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 rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.