Radeon R9 280X vs Radeon R9 M295X

Intro

Compare all of that to the Radeon R9 M295X, which uses a 28 nm design. AMD has clocked the core speed at 750 MHz. The GDDR5 memory works at a frequency of 1375 MHz on this specific card. It features 2048 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

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 theoretically be quite a bit superior to the Radeon R9 M295X in general. (explain)

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

Texel Rate

The Radeon R9 280X will be a small bit (more or less 13%) more effective 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

The Radeon R9 280X will be a bit (approximately 13%) better at full screen anti-aliasing than the Radeon R9 M295X, and also able to handle higher screen resolutions while still performing well. (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 maximum amount of data (in units of megabytes per second) that can be moved past the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, 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 most pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units 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 output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.