GeForce GTX 750 vs Radeon HD 3850 1GB

Intro

Compare all that to the Radeon HD 3850 1GB, which comes with GPU core speed of 668 MHz, and 1024 MB of GDDR3 memory running at 828 MHz through a 256-bit bus. It also is made up of 320(64x5) Stream Processors, 16 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750		55 Watts
Radeon HD 3850 1GB		75 Watts
	Difference: 20 Watts (36%)

Memory Bandwidth

In theory, the GeForce GTX 750 should perform much faster than the Radeon HD 3850 1GB overall. (explain)

GeForce GTX 750		80000 MB/sec
Radeon HD 3850 1GB		52992 MB/sec
	Difference: 27008 (51%)

Texel Rate

The GeForce GTX 750 is a lot (more or less 205%) faster with regards to AF than the Radeon HD 3850 1GB. (explain)

GeForce GTX 750		32640 Mtexels/sec
Radeon HD 3850 1GB		10688 Mtexels/sec
	Difference: 21952 (205%)

Pixel Rate

The GeForce GTX 750 will be quite a bit (about 53%) faster with regards to AA than the Radeon HD 3850 1GB, and also capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 750		16320 Mpixels/sec
Radeon HD 3850 1GB		10688 Mpixels/sec
	Difference: 5632 (53%)

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 (in units of megabytes per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, the result 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 number of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total amount of texture units 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 processed per second.

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