Radeon R7 M260 vs Radeon R9 M270X

Intro

Compare those specs to the Radeon R9 M270X, which has a core clock speed of 725 MHz and a GDDR5 memory speed of 1125 MHz. It also uses a 128-bit bus, and uses a 28 nm design. It is made up of 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M270X should in theory perform quite a bit faster than the Radeon R7 M260 overall. (explain)

Radeon R9 M270X		72000 MB/sec
Radeon R7 M260		16000 MB/sec
	Difference: 56000 (350%)

Texel Rate

The Radeon R9 M270X is a lot (about 69%) more effective at texture filtering than the Radeon R7 M260. (explain)

Radeon R9 M270X		29000 Mtexels/sec
Radeon R7 M260		17160 Mtexels/sec
	Difference: 11840 (69%)

Pixel Rate

The Radeon R9 M270X is much (more or less 103%) faster with regards to full screen anti-aliasing than the Radeon R7 M260, and should be capable of handling higher resolutions without losing too much performance. (explain)

Radeon R9 M270X		11600 Mpixels/sec
Radeon R7 M260		5720 Mpixels/sec
	Difference: 5880 (103%)

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 maximum amount of information (measured in megabytes per second) that can be transported past the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better 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 can be processed per second. This is worked out by multiplying the total number of texture units of the card by the core clock 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 applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units 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 fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.