Radeon HD 4550 512MB vs Radeon R7 250

Intro

Compare that to the Radeon R7 250, which features GPU core speed of 1000 MHz, and 1024 MB of GDDR5 memory set to run at 1150 MHz through a 128-bit bus. It also is comprised of 384 SPUs, 24 TAUs, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4550 512MB		25 Watts
Radeon R7 250		65 Watts
	Difference: 40 Watts (160%)

Memory Bandwidth

In theory, the Radeon R7 250 should be 475% faster than the Radeon HD 4550 512MB in general, due to its greater bandwidth. (explain)

Radeon R7 250		73600 MB/sec
Radeon HD 4550 512MB		12800 MB/sec
	Difference: 60800 (475%)

Texel Rate

The Radeon R7 250 is quite a bit (approximately 400%) more effective at texture filtering than the Radeon HD 4550 512MB. (explain)

Radeon R7 250		24000 Mtexels/sec
Radeon HD 4550 512MB		4800 Mtexels/sec
	Difference: 19200 (400%)

Pixel Rate

The Radeon R7 250 should be a lot (more or less 233%) faster with regards to AA than the Radeon HD 4550 512MB, and will be able to handle higher resolutions more effectively. (explain)

Radeon R7 250		8000 Mpixels/sec
Radeon HD 4550 512MB		2400 Mpixels/sec
	Difference: 5600 (233%)

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 maximum amount of data (counted in MB per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total number of texture units of the card by the core 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 can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.