Radeon R9 290X vs Radeon R9 M275X

Intro

Compare that to the Radeon R9 M275X, which features a core clock frequency of 900 MHz and a GDDR5 memory frequency of 1125 MHz. It also uses a 128-bit memory bus, and makes use of a 28 nm design. It is made up of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

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 should in theory be a lot faster than the Radeon R9 M275X overall. (explain)

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

Texel Rate

The Radeon R9 290X is a lot (about 291%) more effective at anisotropic 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 a high resolution is important to you, then the Radeon R9 290X is superior to the Radeon R9 M275X, 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 (counted in megabytes per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the bus width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 once 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 AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.