Geforce GTX 680 vs Radeon HD 4550 256MB

Intro

Compare that to the Radeon HD 4550 256MB, which features a clock speed of 600 MHz and a DDR3 memory frequency of 800 MHz. It also uses a 64-bit memory bus, and uses a 55 nm design. It is made up of 80(16x5) SPUs, 8 Texture Address Units, and 4 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4550 256MB		25 Watts
Geforce GTX 680		195 Watts
	Difference: 170 Watts (680%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 680 should perform quite a bit faster than the Radeon HD 4550 256MB overall. (explain)

Geforce GTX 680		192256 MB/sec
Radeon HD 4550 256MB		12800 MB/sec
	Difference: 179456 (1402%)

Texel Rate

The Geforce GTX 680 is quite a bit (approximately 2583%) more effective at AF than the Radeon HD 4550 256MB. (explain)

Geforce GTX 680		128768 Mtexels/sec
Radeon HD 4550 256MB		4800 Mtexels/sec
	Difference: 123968 (2583%)

Pixel Rate

If using a high resolution is important to you, then the Geforce GTX 680 is a better choice, by far. (explain)

Geforce GTX 680		32192 Mpixels/sec
Radeon HD 4550 256MB		2400 Mpixels/sec
	Difference: 29792 (1241%)

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 maximum amount of data (in units of MB per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, the result 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.