Radeon HD 4850 512MB vs Radeon R7 M260X

Intro

Compare all of that to the Radeon R7 M260X, which features a clock speed of 825 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 128-bit memory bus, and uses a 28 nm design. It features 384 SPUs, 24 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon R7 M260X should perform a bit faster than the Radeon HD 4850 512MB in general. (explain)

Radeon R7 M260X		64000 MB/sec
Radeon HD 4850 512MB		63552 MB/sec
	Difference: 448 (1%)

Texel Rate

The Radeon HD 4850 512MB will be much (approximately 26%) more effective at AF than the Radeon R7 M260X. (explain)

Radeon HD 4850 512MB		25000 Mtexels/sec
Radeon R7 M260X		19800 Mtexels/sec
	Difference: 5200 (26%)

Pixel Rate

The Radeon HD 4850 512MB will be much (approximately 52%) faster with regards to FSAA than the Radeon R7 M260X, and will be capable of handling higher screen resolutions more effectively. (explain)

Radeon HD 4850 512MB		10000 Mpixels/sec
Radeon R7 M260X		6600 Mpixels/sec
	Difference: 3400 (52%)

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 data (counted in MB per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the 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 are applied in one second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs 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 also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.