Radeon R9 280X vs Radeon R9 M295X

Intro

Compare those specifications to the Radeon R9 M295X, which makes use of a 28 nm design. AMD has clocked the core frequency at 750 MHz. The GDDR5 memory runs at a speed of 1375 MHz on this model. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X		125 Watts
Radeon R9 280X		250 Watts
	Difference: 125 Watts (100%)

Memory Bandwidth

Performance-wise, the Radeon R9 280X should in theory be much superior to the Radeon R9 M295X overall. (explain)

Radeon R9 280X		288000 MB/sec
Radeon R9 M295X		176000 MB/sec
	Difference: 112000 (64%)

Texel Rate

The Radeon R9 280X is a bit (about 13%) better at AF than the Radeon R9 M295X. (explain)

Radeon R9 280X		108800 Mtexels/sec
Radeon R9 M295X		96000 Mtexels/sec
	Difference: 12800 (13%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R9 280X is a better choice, though only just barely. (explain)

Radeon R9 280X		27200 Mpixels/sec
Radeon R9 M295X		24000 Mpixels/sec
	Difference: 3200 (13%)

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 max amount of information (measured in megabytes per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the 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 processed per second. This figure is calculated by multiplying the total texture units by the core clock 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.