Radeon R9 290X vs Radeon R9 M275X

Intro

Compare all that to the Radeon R9 M275X, which features GPU core speed of 900 MHz, and 2048 MB of GDDR5 RAM set to run at 1125 MHz through a 128-bit bus. It also is comprised of 640 Stream Processors, 40 Texture Address Units, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M275X		50 Watts
Radeon R9 290X		300 Watts
	Difference: 250 Watts (500%)

Memory Bandwidth

The Radeon R9 290X, in theory, should be a lot faster than the Radeon R9 M275X in general. (explain)

Radeon R9 290X		320000 MB/sec
Radeon R9 M275X		72000 MB/sec
	Difference: 248000 (344%)

Texel Rate

The Radeon R9 290X is much (approximately 291%) better at texture filtering than the Radeon R9 M275X. (explain)

Radeon R9 290X		140800 Mtexels/sec
Radeon R9 M275X		36000 Mtexels/sec
	Difference: 104800 (291%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 290X is the winner, and very much so. (explain)

Radeon R9 290X		51200 Mpixels/sec
Radeon R9 M275X		14400 Mpixels/sec
	Difference: 36800 (256%)

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 over the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 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 applied per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write 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 called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.