Radeon R7 250X 2GB vs Radeon R9 M280X

Intro

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M280X		75 Watts
Radeon R7 250X 2GB		95 Watts
	Difference: 20 Watts (27%)

Memory Bandwidth

The Radeon R9 M280X should in theory perform a lot faster than the Radeon R7 250X 2GB overall. (explain)

Radeon R9 M280X		88000 MB/sec
Radeon R7 250X 2GB		72000 MB/sec
	Difference: 16000 (22%)

Texel Rate

The Radeon R9 M280X should be quite a bit (approximately 26%) more effective at anisotropic filtering than the Radeon R7 250X 2GB. (explain)

Radeon R9 M280X		50400 Mtexels/sec
Radeon R7 250X 2GB		40000 Mtexels/sec
	Difference: 10400 (26%)

Pixel Rate

The Radeon R7 250X 2GB will be a small bit (approximately 11%) more effective at FSAA than the Radeon R9 M280X, and should be capable of handling higher screen resolutions while still performing well. (explain)

Radeon R7 250X 2GB		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 (in units of MB per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number 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 fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.