GeForce GTX 750 vs Radeon HD 3870 1GB

Intro

Compare those specifications to the Radeon HD 3870 1GB, which uses a 55 nm design. AMD has set the core frequency at 775 MHz. The GDDR4 RAM works at a frequency of 1125 MHz on this particular card. It features 320(64x5) SPUs along with 16 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750		55 Watts
Radeon HD 3870 1GB		106 Watts
	Difference: 51 Watts (93%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 750 will be 11% quicker than the Radeon HD 3870 1GB in general, because of its higher data rate. (explain)

GeForce GTX 750		80000 MB/sec
Radeon HD 3870 1GB		72000 MB/sec
	Difference: 8000 (11%)

Texel Rate

The GeForce GTX 750 should be much (more or less 163%) more effective at texture filtering than the Radeon HD 3870 1GB. (explain)

GeForce GTX 750		32640 Mtexels/sec
Radeon HD 3870 1GB		12400 Mtexels/sec
	Difference: 20240 (163%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 750 is superior to the Radeon HD 3870 1GB, by a large margin. (explain)

GeForce GTX 750		16320 Mpixels/sec
Radeon HD 3870 1GB		12400 Mpixels/sec
	Difference: 3920 (32%)

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 information (in units of MB per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the bus width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.