Radeon R7 M260 vs Radeon R9 M390X

Intro

Compare those specs to the Radeon R9 M390X, which features a clock frequency of 723 MHz and a GDDR5 memory speed of 1250 MHz. It also uses a 256-bit memory bus, and makes use of a 28 nm design. It is made up of 2048 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon R9 M390X should in theory be much superior to the Radeon R7 M260 overall. (explain)

Radeon R9 M390X		160000 MB/sec
Radeon R7 M260		16000 MB/sec
	Difference: 144000 (900%)

Texel Rate

The Radeon R9 M390X is quite a bit (more or less 439%) better at texture filtering than the Radeon R7 M260. (explain)

Radeon R9 M390X		92544 Mtexels/sec
Radeon R7 M260		17160 Mtexels/sec
	Difference: 75384 (439%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 M390X is superior to the Radeon R7 M260, by a large margin. (explain)

Radeon R9 M390X		23136 Mpixels/sec
Radeon R7 M260		5720 Mpixels/sec
	Difference: 17416 (304%)

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 data (measured in megabytes per second) that can be transferred over the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.