Radeon HD 4670 512MB vs Radeon R7 M260

Intro

Compare those specifications to the Radeon R7 M260, which makes use of a 28 nm design. AMD has clocked the core frequency at 715 MHz. The DDR3 RAM is set to run at a speed of 1000 MHz on this particular model. It features 384 SPUs as well as 24 TAUs and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 4670 512MB should be 100% quicker than the Radeon R7 M260 in general, because of its higher bandwidth. (explain)

Radeon HD 4670 512MB		32000 MB/sec
Radeon R7 M260		16000 MB/sec
	Difference: 16000 (100%)

Texel Rate

The Radeon HD 4670 512MB is quite a bit (approximately 40%) better at anisotropic filtering than the Radeon R7 M260. (explain)

Radeon HD 4670 512MB		24000 Mtexels/sec
Radeon R7 M260		17160 Mtexels/sec
	Difference: 6840 (40%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 4670 512MB is superior to the Radeon R7 M260, but not by far. (explain)

Radeon HD 4670 512MB		6000 Mpixels/sec
Radeon R7 M260		5720 Mpixels/sec
	Difference: 280 (5%)

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 (counted in MB per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics 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 maximum amount of pixels that the graphics chip could possibly record to its local memory per 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 - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.