Radeon R7 250X vs Radeon R9 M280X

Intro

Compare those specifications to the Radeon R9 M280X, which features a core clock frequency of 900 MHz and a GDDR5 memory frequency of 1375 MHz. It also features a 128-bit memory bus, and uses a 28 nm design. It is made up of 896 SPUs, 56 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M280X		75 Watts
Radeon R7 250X		95 Watts
	Difference: 20 Watts (27%)

Memory Bandwidth

The Radeon R9 M280X, in theory, should be quite a bit faster than the Radeon R7 250X in general. (explain)

Radeon R9 M280X		88000 MB/sec
Radeon R7 250X		72000 MB/sec
	Difference: 16000 (22%)

Texel Rate

The Radeon R9 M280X is quite a bit (more or less 26%) more effective at AF than the Radeon R7 250X. (explain)

Radeon R9 M280X		50400 Mtexels/sec
Radeon R7 250X		40000 Mtexels/sec
	Difference: 10400 (26%)

Pixel Rate

The Radeon R7 250X is a bit (approximately 11%) faster with regards to anti-aliasing than the Radeon R9 M280X, and capable of handling higher resolutions without losing too much performance. (explain)

Radeon R7 250X		16000 Mpixels/sec
Radeon R9 M280X		14400 Mpixels/sec
	Difference: 1600 (11%)

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 information (counted in megabytes per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.