Radeon HD 4550 512MB vs Radeon R7 240

Intro

Compare that to the Radeon R7 240, which has GPU clock speed of 730 MHz, and 2048 MB of DDR3 RAM set to run at 900 MHz through a 128-bit bus. It also is comprised of 320 Stream Processors, 20 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4550 512MB		25 Watts
Radeon R7 240		30 Watts
	Difference: 5 Watts (20%)

Memory Bandwidth

Performance-wise, the Radeon R7 240 should in theory be quite a bit superior to the Radeon HD 4550 512MB in general. (explain)

Radeon R7 240		28800 MB/sec
Radeon HD 4550 512MB		12800 MB/sec
	Difference: 16000 (125%)

Texel Rate

The Radeon R7 240 is a lot (more or less 204%) faster with regards to anisotropic filtering than the Radeon HD 4550 512MB. (explain)

Radeon R7 240		14600 Mtexels/sec
Radeon HD 4550 512MB		4800 Mtexels/sec
	Difference: 9800 (204%)

Pixel Rate

The Radeon R7 240 is much (approximately 143%) better at AA than the Radeon HD 4550 512MB, and also capable of handling higher resolutions better. (explain)

Radeon R7 240		5840 Mpixels/sec
Radeon HD 4550 512MB		2400 Mpixels/sec
	Difference: 3440 (143%)

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 (counted in MB per second) that can be moved over the external memory interface in one second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the card will be at handling 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 that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of 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 output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.