Radeon R9 290X vs Radeon R9 M290X

Intro

Compare that to the Radeon R9 M290X, which features a clock speed of 850 MHz and a GDDR5 memory frequency of 1200 MHz. It also makes use of a 256-bit bus, and makes use of a 28 nm design. It is made up of 1280 SPUs, 80 TAUs, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M290X		100 Watts
Radeon R9 290X		300 Watts
	Difference: 200 Watts (200%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 290X should perform quite a bit faster than the Radeon R9 M290X in general. (explain)

Radeon R9 290X		320000 MB/sec
Radeon R9 M290X		153600 MB/sec
	Difference: 166400 (108%)

Texel Rate

The Radeon R9 290X should be much (more or less 107%) better at AF than the Radeon R9 M290X. (explain)

Radeon R9 290X		140800 Mtexels/sec
Radeon R9 M290X		68000 Mtexels/sec
	Difference: 72800 (107%)

Pixel Rate

The Radeon R9 290X will be much (more or less 88%) better at full screen anti-aliasing than the Radeon R9 M290X, and will be capable of handling higher resolutions better. (explain)

Radeon R9 290X		51200 Mpixels/sec
Radeon R9 M290X		27200 Mpixels/sec
	Difference: 24000 (88%)

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: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of 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.