GeForce GTX 550 Ti vs Radeon HD 4670 512MB

Intro

Compare those specs to the Radeon HD 4670 512MB, which uses a 55 nm design. AMD has clocked the core speed at 750 MHz. The GDDR4/GDDR3/DDR3/DDR2 memory works at a speed of 1000 MHz on this specific card. It features 320(64x5) SPUs as well as 32 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 512MB		70 Watts
GeForce GTX 550 Ti		116 Watts
	Difference: 46 Watts (66%)

Memory Bandwidth

In theory, the GeForce GTX 550 Ti should be 208% faster than the Radeon HD 4670 512MB in general, because of its greater data rate. (explain)

GeForce GTX 550 Ti		98496 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 66496 (208%)

Texel Rate

The GeForce GTX 550 Ti should be just a bit (about 20%) faster with regards to AF than the Radeon HD 4670 512MB. (explain)

GeForce GTX 550 Ti		28800 Mtexels/sec
Radeon HD 4670 512MB		24000 Mtexels/sec
	Difference: 4800 (20%)

Pixel Rate

The GeForce GTX 550 Ti will be a lot (more or less 260%) more effective at full screen anti-aliasing than the Radeon HD 4670 512MB, and also will be able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 550 Ti		21600 Mpixels/sec
Radeon HD 4670 512MB		6000 Mpixels/sec
	Difference: 15600 (260%)

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 (in units of MB per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory speed. 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 card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.