Radeon HD 4670 512MB vs Radeon R7 M260X

Intro

Compare those specs to the Radeon R7 M260X, which features GPU core speed of 825 MHz, and 2048 MB of GDDR5 memory running at 1000 MHz through a 128-bit bus. It also features 384 SPUs, 24 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R7 M260X will be 100% faster than the Radeon HD 4670 512MB overall, due to its greater data rate. (explain)

Radeon R7 M260X		64000 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 32000 (100%)

Texel Rate

The Radeon HD 4670 512MB will be much (about 21%) better at texture filtering than the Radeon R7 M260X. (explain)

Radeon HD 4670 512MB		24000 Mtexels/sec
Radeon R7 M260X		19800 Mtexels/sec
	Difference: 4200 (21%)

Pixel Rate

The Radeon R7 M260X should be a little bit (more or less 10%) faster with regards to full screen anti-aliasing than the Radeon HD 4670 512MB, and able to handle higher screen resolutions without losing too much performance. (explain)

Radeon R7 M260X		6600 Mpixels/sec
Radeon HD 4670 512MB		6000 Mpixels/sec
	Difference: 600 (10%)

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 transported across the external memory interface in a second. It is calculated by multiplying the interface width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better 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 can be applied in one second. This number is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.