Geforce GTX 670 vs Radeon HD 4870 1GB

Intro

Compare all of that to the Radeon HD 4870 1GB, which uses a 55 nm design. AMD has set the core speed at 750 MHz. The GDDR5 memory is set to run at a frequency of 900 MHz on this model. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4870 1GB		150 Watts
Geforce GTX 670		170 Watts
	Difference: 20 Watts (13%)

Memory Bandwidth

Theoretically, the Geforce GTX 670 should perform a lot faster than the Radeon HD 4870 1GB in general. (explain)

Geforce GTX 670		192000 MB/sec
Radeon HD 4870 1GB		115200 MB/sec
	Difference: 76800 (67%)

Texel Rate

The Geforce GTX 670 is a lot (approximately 242%) better at anisotropic filtering than the Radeon HD 4870 1GB. (explain)

Geforce GTX 670		102480 Mtexels/sec
Radeon HD 4870 1GB		30000 Mtexels/sec
	Difference: 72480 (242%)

Pixel Rate

The Geforce GTX 670 should be a lot (more or less 144%) more effective at anti-aliasing than the Radeon HD 4870 1GB, and also should be able to handle higher screen resolutions while still performing well. (explain)

Geforce GTX 670		29280 Mpixels/sec
Radeon HD 4870 1GB		12000 Mpixels/sec
	Difference: 17280 (144%)

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 largest amount of data (measured in MB per second) that can be transported over the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.