GeForce GTX 750 vs Radeon HD 4870 2GB

Intro

Compare all of that to the Radeon HD 4870 2GB, which features a GPU core clock speed of 750 MHz, and 2048 MB of GDDR5 memory running at 900 MHz through a 256-bit bus. It also features 800(160x5) SPUs, 40 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 4870 2GB		150 Watts
	Difference: 95 Watts (173%)

Memory Bandwidth

The Radeon HD 4870 2GB, in theory, should perform much faster than the GeForce GTX 750 overall. (explain)

Radeon HD 4870 2GB		115200 MB/sec
GeForce GTX 750		80000 MB/sec
	Difference: 35200 (44%)

Texel Rate

The GeForce GTX 750 will be a small bit (about 9%) more effective at texture filtering than the Radeon HD 4870 2GB. (explain)

GeForce GTX 750		32640 Mtexels/sec
Radeon HD 4870 2GB		30000 Mtexels/sec
	Difference: 2640 (9%)

Pixel Rate

The GeForce GTX 750 is a lot (about 36%) better at anti-aliasing than the Radeon HD 4870 2GB, and capable of handling higher resolutions better. (explain)

GeForce GTX 750		16320 Mpixels/sec
Radeon HD 4870 2GB		12000 Mpixels/sec
	Difference: 4320 (36%)

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 maximum amount of data (counted in MB per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This number is calculated 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 video card will be at handling 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 the local memory per 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 - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.