Radeon R9 M275X vs Radeon R9 M290X

Intro

Compare all of that to the Radeon R9 M290X, which has a clock frequency of 850 MHz and a GDDR5 memory frequency of 1200 MHz. It also features a 256-bit memory bus, and uses a 28 nm design. It features 1280 SPUs, 80 Texture Address Units, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M275X		50 Watts
Radeon R9 M290X		100 Watts
	Difference: 50 Watts (100%)

Memory Bandwidth

The Radeon R9 M290X should theoretically perform quite a bit faster than the Radeon R9 M275X overall. (explain)

Radeon R9 M290X		153600 MB/sec
Radeon R9 M275X		72000 MB/sec
	Difference: 81600 (113%)

Texel Rate

The Radeon R9 M290X should be much (about 89%) faster with regards to AF than the Radeon R9 M275X. (explain)

Radeon R9 M290X		68000 Mtexels/sec
Radeon R9 M275X		36000 Mtexels/sec
	Difference: 32000 (89%)

Pixel Rate

The Radeon R9 M290X should be much (approximately 89%) more effective at AA than the Radeon R9 M275X, and will be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon R9 M290X		27200 Mpixels/sec
Radeon R9 M275X		14400 Mpixels/sec
	Difference: 12800 (89%)

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 largest amount of data (in units of megabytes per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core clock speed. 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 lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.