Radeon HD 4850 512MB vs Radeon R7 M260X

Intro

Compare those specs to the Radeon R7 M260X, which features a clock speed of 825 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 128-bit memory bus, and makes use of a 28 nm design. It is comprised of 384 SPUs, 24 TAUs, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon R7 M260X should theoretically be just a bit superior to the Radeon HD 4850 512MB overall. (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 quite a bit (approximately 26%) faster with regards to anisotropic filtering 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 a lot (approximately 52%) faster with regards to full screen anti-aliasing than the Radeon R7 M260X, and also able to handle higher screen resolutions better. (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: Memory bandwidth is the largest amount of information (counted in MB per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory speed. In the case of DDR memory, it should be multiplied by 2 once again. If 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 higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units 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 fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.