GeForce GTX 560 Ti 448 vs Radeon HD 4870 2GB

Intro

Compare those specs to the Radeon HD 4870 2GB, which makes use of a 55 nm design. AMD has set the core speed at 750 MHz. The GDDR5 memory works at a speed of 900 MHz on this specific card. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4870 2GB		150 Watts
GeForce GTX 560 Ti 448		210 Watts
	Difference: 60 Watts (40%)

Memory Bandwidth

Theoretically, the GeForce GTX 560 Ti 448 should be a lot faster than the Radeon HD 4870 2GB in general. (explain)

GeForce GTX 560 Ti 448		144000 MB/sec
Radeon HD 4870 2GB		115200 MB/sec
	Difference: 28800 (25%)

Texel Rate

The GeForce GTX 560 Ti 448 will be a lot (about 37%) more effective at anisotropic filtering than the Radeon HD 4870 2GB. (explain)

GeForce GTX 560 Ti 448		40992 Mtexels/sec
Radeon HD 4870 2GB		30000 Mtexels/sec
	Difference: 10992 (37%)

Pixel Rate

The GeForce GTX 560 Ti 448 is quite a bit (more or less 144%) faster with regards to anti-aliasing than the Radeon HD 4870 2GB, and also capable of handling higher resolutions more effectively. (explain)

GeForce GTX 560 Ti 448		29280 Mpixels/sec
Radeon HD 4870 2GB		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 maximum amount of information (counted in MB per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total texture units of the card 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip 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 Raster Operations Pipelines by the clock 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 rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.