Radeon R7 250 vs Radeon R9 M280X

Intro

Compare those specs to the Radeon R9 M280X, which features GPU clock speed of 900 MHz, and 4096 MB of GDDR5 memory set to run at 1375 MHz through a 128-bit bus. It also is comprised of 896 SPUs, 56 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250		65 Watts
Radeon R9 M280X		75 Watts
	Difference: 10 Watts (15%)

Memory Bandwidth

The Radeon R9 M280X should in theory perform just a bit faster than the Radeon R7 250 in general. (explain)

Radeon R9 M280X		88000 MB/sec
Radeon R7 250		73600 MB/sec
	Difference: 14400 (20%)

Texel Rate

The Radeon R9 M280X will be a lot (more or less 110%) more effective at texture filtering than the Radeon R7 250. (explain)

Radeon R9 M280X		50400 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 26400 (110%)

Pixel Rate

The Radeon R9 M280X is a lot (more or less 80%) more effective at AA than the Radeon R7 250, and will be capable of handling higher screen resolutions better. (explain)

Radeon R9 M280X		14400 Mpixels/sec
Radeon R7 250		8000 Mpixels/sec
	Difference: 6400 (80%)

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: Memory bandwidth is the max amount of data (in units of MB per second) that can be transported over the external memory interface within a second. It's calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.