GeForce GTX 260 216SP 55 nm vs Radeon HD 4870 512MB

Intro

Compare those specs to the Radeon HD 4870 512MB, which comes with core speeds of 750 MHz on the GPU, and 900 MHz on the 512 MB of GDDR5 RAM. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4870 512MB		150 Watts
GeForce GTX 260 216SP 55 nm		171 Watts
	Difference: 21 Watts (14%)

Memory Bandwidth

The Radeon HD 4870 512MB should theoretically be a bit faster than the GeForce GTX 260 216SP 55 nm in general. (explain)

Radeon HD 4870 512MB		115200 MB/sec
GeForce GTX 260 216SP 55 nm		111888 MB/sec
	Difference: 3312 (3%)

Texel Rate

The GeForce GTX 260 216SP 55 nm is a lot (about 38%) faster with regards to anisotropic filtering than the Radeon HD 4870 512MB. (explain)

GeForce GTX 260 216SP 55 nm		41472 Mtexels/sec
Radeon HD 4870 512MB		30000 Mtexels/sec
	Difference: 11472 (38%)

Pixel Rate

The GeForce GTX 260 216SP 55 nm should be much (approximately 34%) better at AA than the Radeon HD 4870 512MB, and will be able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 260 216SP 55 nm		16128 Mpixels/sec
Radeon HD 4870 512MB		12000 Mpixels/sec
	Difference: 4128 (34%)

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: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be moved past the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 number of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.