Radeon R7 M265 vs Radeon R9 M290X

Intro

Compare all of that to the Radeon R9 M290X, which features core clock speeds of 850 MHz on the GPU, and 1200 MHz on the 4096 MB of GDDR5 RAM. It features 1280 SPUs as well as 80 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R9 M290X will be 380% quicker than the Radeon R7 M265 overall, due to its greater data rate. (explain)

Radeon R9 M290X		153600 MB/sec
Radeon R7 M265		32000 MB/sec
	Difference: 121600 (380%)

Texel Rate

The Radeon R9 M290X should be a lot (more or less 291%) faster with regards to AF than the Radeon R7 M265. (explain)

Radeon R9 M290X		68000 Mtexels/sec
Radeon R7 M265		17400 Mtexels/sec
	Difference: 50600 (291%)

Pixel Rate

The Radeon R9 M290X should be a lot (about 369%) better at anti-aliasing than the Radeon R7 M265, and able to handle higher screen resolutions without slowing down too much. (explain)

Radeon R9 M290X		27200 Mpixels/sec
Radeon R7 M265		5800 Mpixels/sec
	Difference: 21400 (369%)

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 MB per second) that can be transferred over the external memory interface within a second. It's worked out by multiplying the bus width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better 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 can be applied per second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, 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 that the graphics card could possibly write to its 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 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 lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.