Radeon R5 M255 vs Radeon R7 250

Intro

Compare those specifications to the Radeon R7 250, which uses a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 memory runs at a frequency of 1150 MHz on this particular card. It features 384 SPUs as well as 24 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R7 250 will be 360% quicker than the Radeon R5 M255 overall, due to its greater data rate. (explain)

Radeon R7 250		73600 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 57600 (360%)

Texel Rate

The Radeon R7 250 is much (approximately 28%) more effective at texture filtering than the Radeon R5 M255. (explain)

Radeon R7 250		24000 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 5200 (28%)

Pixel Rate

The Radeon R7 250 will be a little bit (about 6%) more effective at AA than the Radeon R5 M255, and also should be able to handle higher screen resolutions while still performing well. (explain)

Radeon R7 250		8000 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 480 (6%)

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 data (measured in MB per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on 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 potential to reach the max fill rate.