GeForce GTX 650 vs Radeon HD 5550

Intro

Compare all of that to the Radeon HD 5550, which features GPU clock speed of 550 MHz, and 512 MB of DDR2 memory set to run at 400 MHz through a 128-bit bus. It also features 320(64x5) Stream Processors, 16 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 650 should in theory perform quite a bit faster than the Radeon HD 5550 in general. (explain)

GeForce GTX 650		80000 MB/sec
Radeon HD 5550		12800 MB/sec
	Difference: 67200 (525%)

Texel Rate

The GeForce GTX 650 is a lot (approximately 285%) more effective at AF than the Radeon HD 5550. (explain)

GeForce GTX 650		33856 Mtexels/sec
Radeon HD 5550		8800 Mtexels/sec
	Difference: 25056 (285%)

Pixel Rate

The GeForce GTX 650 is much (about 285%) faster with regards to anti-aliasing than the Radeon HD 5550, and will be able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 650		16928 Mpixels/sec
Radeon HD 5550		4400 Mpixels/sec
	Difference: 12528 (285%)

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 max amount of information (measured in MB per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total texture units 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the card's clock speed. 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 rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.