Geforce GTX 780 vs Radeon HD 4550 512MB

Intro

Compare those specifications to the Radeon HD 4550 512MB, which comes with core speeds of 600 MHz on the GPU, and 800 MHz on the 512 MB of GDDR3 RAM. It features 80(16x5) SPUs as well as 8 Texture Address Units and 4 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4550 512MB		25 Watts
Geforce GTX 780		250 Watts
	Difference: 225 Watts (900%)

Memory Bandwidth

In theory, the Geforce GTX 780 is 2153% quicker than the Radeon HD 4550 512MB overall, due to its higher bandwidth. (explain)

Geforce GTX 780		288384 MB/sec
Radeon HD 4550 512MB		12800 MB/sec
	Difference: 275584 (2153%)

Texel Rate

The Geforce GTX 780 will be much (approximately 3352%) more effective at AF than the Radeon HD 4550 512MB. (explain)

Geforce GTX 780		165696 Mtexels/sec
Radeon HD 4550 512MB		4800 Mtexels/sec
	Difference: 160896 (3352%)

Pixel Rate

If running with a high screen resolution is important to you, then the Geforce GTX 780 is superior to the Radeon HD 4550 512MB, and very much so. (explain)

Geforce GTX 780		41424 Mpixels/sec
Radeon HD 4550 512MB		2400 Mpixels/sec
	Difference: 39024 (1626%)

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 information (in units of megabytes per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better 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 most pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also 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 of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.