GeForce GTX 580 vs Radeon HD 5670

Intro

Compare all that to the Radeon HD 5670, which features a clock speed of 775 MHz and a GDDR5 memory speed of 1000 MHz. It also features a 128-bit memory bus, and makes use of a 40 nm design. It is comprised of 400(80x5) SPUs, 20 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670		61 Watts
GeForce GTX 580		244 Watts
	Difference: 183 Watts (300%)

Memory Bandwidth

In theory, the GeForce GTX 580 should be 201% faster than the Radeon HD 5670 in general, due to its greater data rate. (explain)

GeForce GTX 580		192384 MB/sec
Radeon HD 5670		64000 MB/sec
	Difference: 128384 (201%)

Texel Rate

The GeForce GTX 580 is a lot (about 219%) faster with regards to anisotropic filtering than the Radeon HD 5670. (explain)

GeForce GTX 580		49408 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 33908 (219%)

Pixel Rate

The GeForce GTX 580 is quite a bit (approximately 498%) faster with regards to anti-aliasing than the Radeon HD 5670, and able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 580		37056 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 30856 (498%)

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 information (measured in MB per second) that can be transported over the external memory interface in a second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount 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 worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.